I'm a little bit confused by following situation:

I have code, say around 8000 lines. Now, I'm facing a build error which just says

dmd failed with exit code -11,

(same for ldc2, with some lines of stack information, which do not belong to my code)

0  ldc2                     0x0000000106fcc4e7 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1  ldc2                     0x0000000106fcb9ea llvm::sys::RunSignalHandlers() + 83
2  ldc2                     0x0000000106fcc90e SignalHandler(int) + 239
3  libsystem_platform.dylib 0x00007fff5992af5a _sigtramp + 26
4  libsystem_platform.dylib 0x000000015fcde600 _sigtramp + 104543936
ldc2 failed with exit code -11.

As I'm compiling rather often, I know exactly which line in my code causes this error. As the compiler refuses to exit normally, I'm not sure, if the line is buggy (so, whether I'm trying to compile, something, what is not compilable) or, I'm facing an ICE. In both cases, I'm ready to rewrite my code a little bit to get around the error, as I need a solution quite fast.

My assumption is, that I built a kind of loop, which the compiler does not know how to get along. But in order to rewrite it, I have to know, what I have to rewrite... So, despite I know exactly the culprit line in my code, I don't have any information about how to solve the problem.

What I'm trying now is to use dustmite. But this, lasts for about 8 hours now and is already at depth 20. Lacking experience with this tool, I'm not sure, if this is normal... The last time I tried to use it elsewhere, I got a final depth of 13, but also an empty file as its analysis result.

The command for dustmite was
dub dustmite ../dust --compiler-status=-11 --combined

Yes... the builds were also done with dub. So,
dub build
and
dub build --compiler=ldc2
respectively.

Any help is appreciated :)
Alex

On Saturday, 4 August 2018 at 12:21:36 UTC, Alex wrote:
>
Ok. Dustmite finished. But the result is again an empty file... :(

On Saturday, 4 August 2018 at 12:21:36 UTC, Alex wrote:
> I'm a little bit confused by following situation:
>
> I have code, say around 8000 lines. Now, I'm facing a build error which just says
>
> dmd failed with exit code -11,
>
> (same for ldc2, with some lines of stack information, which do not belong to my code)
>
> 0  ldc2                     0x0000000106fcc4e7 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
> 1  ldc2                     0x0000000106fcb9ea llvm::sys::RunSignalHandlers() + 83
> 2  ldc2                     0x0000000106fcc90e SignalHandler(int) + 239
> 3  libsystem_platform.dylib 0x00007fff5992af5a _sigtramp + 26
> 4  libsystem_platform.dylib 0x000000015fcde600 _sigtramp + 104543936
> ldc2 failed with exit code -11.
>

Is this the entire stack trace? If dmd is also affected chances it is a frontend bug.

> As I'm compiling rather often, I know exactly which line in my code causes this error. As the compiler refuses to exit normally, I'm not sure, if the line is buggy (so, whether I'm trying to compile, something, what is not compilable) or, I'm facing an ICE.

You are.

>In both cases, I'm ready to rewrite my code a
> little bit to get around the error, as I need a solution quite fast.
>
> My assumption is, that I built a kind of loop, which the compiler does not know how to get along. But in order to rewrite it, I have to know, what I have to rewrite... So, despite I know exactly the culprit line in my code, I don't have any information about how to solve the problem.
>
> What I'm trying now is to use dustmite. But this, lasts for about 8 hours now and is already at depth 20. Lacking experience with this tool, I'm not sure, if this is normal... The last time I tried to use it elsewhere, I got a final depth of 13, but also an empty file as its analysis result.
>
> The command for dustmite was
> dub dustmite ../dust --compiler-status=-11 --combined
>
> Yes... the builds were also done with dub. So,
> dub build
> and
> dub build --compiler=ldc2
> respectively.
>
> Any help is appreciated :)
> Alex

A complete stack trace would be a good start.
If you can do enough manual bisection (git or semi-random deletion of potions of code) to post the code that would also be good.

You're most likely hitting an ICE in the front-end (as both compilers crash). What you can always do is invoke the compiler in a GDB session. That's especially useful with an LDC CI build (download: https://github.com/ldc-developers/ldc/releases/tag/CI), as it features debuginfos and enabled LLVM/LDC assertions.

Please file an issue once you narrowed it down a little, ideally with a small reproducible test case.

On Saturday, 4 August 2018 at 13:29:36 UTC, kinke wrote:
> [...] as it features debuginfos

Sorry, scrach that (it used to for the Windows CI build but doesn't anymore).

On Saturday, 4 August 2018 at 13:26:01 UTC, Nicholas Wilson wrote:
>> 0  ldc2                     0x0000000106fcc4e7 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
>> 1  ldc2                     0x0000000106fcb9ea llvm::sys::RunSignalHandlers() + 83
>> 2  ldc2                     0x0000000106fcc90e SignalHandler(int) + 239
>> 3  libsystem_platform.dylib 0x00007fff5992af5a _sigtramp + 26
>> 4  libsystem_platform.dylib 0x000000015fcde600 _sigtramp + 104543936
>> ldc2 failed with exit code -11.
>>
> Is this the entire stack trace? If dmd is also affected chances it is a frontend bug.

Well, on MacOs - yes. On a Linux, it is longer:

/snap/ldc2/78/bin/ldc2(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x2a)[0x22914fa]
/snap/ldc2/78/bin/ldc2(_ZN4llvm3sys17RunSignalHandlersEv+0x3e)[0x228f5be]
/snap/ldc2/78/bin/ldc2[0x228f70c]
/snap/core/current/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fdb8258e390]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem18functionParametersFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd5mtype12TypeFunctionC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayC3dmd4func15FuncDeclarationPC3dmd5mtype4TypePC3dmd10expression10ExpressionZb+0xbf3)[0xa636d3]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x35e4)[0xa6fdb4]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem18resolvePropertiesXFPS3dmd6dscope5ScopeC3dmd10expression10ExpressionC3dmd10expression10ExpressionZC3dmd10expression10Expression+0xecc)[0xa625cc]
/snap/ldc2/78/bin/ldc2(_Z17resolvePropertiesP5ScopeP10Expression+0x11)[0x917511]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x6d)[0xa4903d]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14DebugStatement+0x5a)[0xa5c0fa]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0x502)[0xa4afe2]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0xee)[0xa4abce]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP16ForeachStatement+0x59ef)[0xa50c1f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP21UnrolledLoopStatement+0x7b)[0xa49dfb]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP16ForeachStatement+0x71d)[0xa4b94d]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_D3dmd10expression7resolveFKxS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x5fe)[0x8db2ee]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x877)[0xa66a17]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0xc0f)[0xa6d3df]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_D3dmd10expression7resolveFKxS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x5fe)[0x8db2ee]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x877)[0xa66a17]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0xc0f)[0xa6d3df]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x126)[0x903ca6]
/snap/ldc2/78/bin/ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc1b)[0x91a92b]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP8ScopeExp+0xf8)[0xa68cd8]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x58b)[0xa6cd5b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x126)[0x903ca6]
/snap/ldc2/78/bin/ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc1b)[0x91a92b]
/snap/ldc2/78/bin/ldc2(_D3dmd9dtemplate15functionResolveFPS3dmd11declaration5MatchC3dmd7dsymbol7DsymbolS3dmd7globals3LocPS3dmd6dscope5ScopePS3dmd4root5array45__T5ArrayTC3dmd4root10rootobject10RootObjectZ5ArrayC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayPPxaZv+0x175)[0x9185d5]
/snap/ldc2/78/bin/ldc2(_Z15resolveFuncCallRK3LocP5ScopeP7DsymbolP5ArrayIP10RootObjectEP4TypePS6_IP10ExpressionEi+0x10d)[0x8cc31d]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x1d8e)[0xa6e55e]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x1c76)[0xa6e446]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP15ReturnStatement+0x313)[0xa57003]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x126)[0x903ca6]
/snap/ldc2/78/bin/ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc1b)[0x91a92b]
/snap/ldc2/78/bin/ldc2(_D3dmd9dtemplate15functionResolveFPS3dmd11declaration5MatchC3dmd7dsymbol7DsymbolS3dmd7globals3LocPS3dmd6dscope5ScopePS3dmd4root5array45__T5ArrayTC3dmd4root10rootobject10RootObjectZ5ArrayC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayPPxaZv+0x175)[0x9185d5]
/snap/ldc2/78/bin/ldc2(_Z15resolveFuncCallRK3LocP5ScopeP7DsymbolP5ArrayIP10RootObjectEP4TypePS6_IP10ExpressionEi+0x10d)[0x8cc31d]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem18resolvePropertiesXFPS3dmd6dscope5ScopeC3dmd10expression10ExpressionC3dmd10expression10ExpressionZC3dmd10expression10Expression+0x9e0)[0xa620e0]
/snap/ldc2/78/bin/ldc2(_Z17resolvePropertiesP5ScopeP10Expression+0x11)[0x917511]
/snap/ldc2/78/bin/ldc2(_ZN16InferTypeVisitor5visitEP14ExpInitializer+0x6f)[0x97dc5f]
/snap/ldc2/78/bin/ldc2(_ZN22DsymbolSemanticVisitor5visitEP14VarDeclaration+0x30a)[0xa3125a]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP14DeclarationExp+0x91)[0xa70c51]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0x502)[0xa4afe2]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14WhileStatement+0xaa)[0xa4a62a]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_D3dmd10expression7resolveFKxS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x5fe)[0x8db2ee]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x877)[0xa66a17]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0xc0f)[0xa6d3df]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xdf)[0xa4a04f]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x686)[0xa53546]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_D3dmd10expression7resolveFKxS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x5fe)[0x8db2ee]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x877)[0xa66a17]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0xc0f)[0xa6d3df]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_D3dmd10expression7resolveFKxS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x5fe)[0x8db2ee]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x877)[0xa66a17]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0xff)[0xa7451f]
/snap/ldc2/78/bin/ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x108f)[0x8e07ff]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x299)[0x8d0409]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1b)[0xa7433b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0xff)[0xa7451f]
/snap/ldc2/78/bin/ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x108f)[0x8e07ff]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x299)[0x8d0409]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1b)[0xa7433b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xea)[0x98602a]
/snap/ldc2/78/bin/ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x27d)[0x8cd34d]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0xff)[0xa7451f]
/snap/ldc2/78/bin/ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x108f)[0x8e07ff]
/snap/ldc2/78/bin/ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x299)[0x8d0409]
/snap/ldc2/78/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1b)[0xa7433b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5b)[0xa4902b]
/snap/ldc2/78/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6c)[0xa493cc]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1618)[0x906328]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP20AggregateDeclaration+0x92)[0x90d402]
/snap/ldc2/78/bin/ldc2(_ZN16Semantic3Visitor5visitEP6Module+0x62)[0x904772]
/snap/ldc2/78/bin/ldc2(_Z13mars_mainBodyR5ArrayIPKcES3_+0x148f)[0x9ade9f]
/snap/ldc2/78/bin/ldc2(_Z7cppmainiPPc+0x1e5c)[0xb7003c]
/snap/ldc2/78/bin/ldc2(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv+0xf)[0x233fdef]
/snap/ldc2/78/bin/ldc2(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv+0x14)[0x233fd34]
/snap/ldc2/78/bin/ldc2(_d_run_main+0x1f9)[0x233fc69]
/snap/core/current/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fdb81510830]
/snap/ldc2/78/bin/ldc2(_start+0x29)[0x8b7ee9]

On Saturday, 4 August 2018 at 13:29:36 UTC, kinke wrote:
> You're most likely hitting an ICE in the front-end (as both compilers crash). What you can always do is invoke the compiler in a GDB session. That's especially useful with an LDC CI build (download: https://github.com/ldc-developers/ldc/releases/tag/CI), as it features debuginfos and enabled LLVM/LDC assertions.
>
> Please file an issue once you narrowed it down a little, ideally with a small reproducible test case.

Ok... the longest part was: how to get the compilation string from dub :)

so, got the equivalent to
dub build
(with dmd)
started with gdb under Ubuntu and received after 10-20 seconds:

Program received signal SIGSEGV, Segmentation fault.
0x00000000006045ce in _D3dmd13expressionsem18functionParametersFSQBp7globals3LocPSQCg6dscope5ScopeCQCx5mtype12TypeFunctionCQDvQy4TypePSQEh4root5array__T5ArrayTCQFg10expression10ExpressionZQBkCQGm4func15FuncDeclarationPQDsPQClZb ()

I'm not sure, how to shorten my code at this moment... So, if the traces don't help, let me know, I would spend some more time on this...

On Saturday, 4 August 2018 at 18:12:05 UTC, Alex wrote:
> /snap/ldc2/78/bin/ldc2(_start+0x29)[0x8b7ee9]

You haven't specified the DMD version you are using. Your LDC is 'outdated', so make sure to first check whether it still fails with an up-to-date version before potentially wasting time.

On Saturday, 4 August 2018 at 22:50:49 UTC, kinke wrote:
> On Saturday, 4 August 2018 at 18:12:05 UTC, Alex wrote:
>> /snap/ldc2/78/bin/ldc2(_start+0x29)[0x8b7ee9]
>
> You haven't specified the DMD version you are using. Your LDC is 'outdated', so make sure to first check whether it still fails with an up-to-date version before potentially wasting time.


DMD64 D Compiler v2.081.1


and the output for

LDC - the LLVM D compiler (1.8.0):
  based on DMD v2.078.3 and LLVM 5.0.1
  built with LDC - the LLVM D compiler (0.17.5)

is:

/usr/lib/x86_64-linux-gnu/libLLVM-5.0.so.1(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x2a)[0x7fb1945551fa]
/usr/lib/x86_64-linux-gnu/libLLVM-5.0.so.1(_ZN4llvm3sys17RunSignalHandlersEv+0x56)[0x7fb194553416]
/usr/lib/x86_64-linux-gnu/libLLVM-5.0.so.1(+0x7a754b)[0x7fb19455354b]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7fb193997890]
ldc2(_D3dmd13expressionsem18functionParametersFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd5mtype12TypeFunctionC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayC3dmd4func15FuncDeclarationPC3dmd5mtype4TypePC3dmd10expression10ExpressionZb+0xd1e)[0x560e820d100e]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x338b)[0x560e820dd2fb]
ldc2(_D3dmd13expressionsem18resolvePropertiesXFPS3dmd6dscope5ScopeC3dmd10expression10ExpressionC3dmd10expression10ExpressionZC3dmd10expression10Expression+0xcaa)[0x560e820cfb5a]
ldc2(_Z17resolvePropertiesP5ScopeP10Expression+0x11)[0x560e81fe5201]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x6e)[0x560e8219cd3e]
ldc2(_ZN24StatementSemanticVisitor5visitEP14DebugStatement+0x5d)[0x560e821b0d6d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0x707)[0x560e8219f197]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0xfd)[0x560e8219eb8d]
ldc2(_ZN24StatementSemanticVisitor5visitEP16ForeachStatement+0x5eb2)[0x560e821a5302]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP21UnrolledLoopStatement+0x87)[0x560e8219dc77]
ldc2(_ZN24StatementSemanticVisitor5visitEP16ForeachStatement+0x781)[0x560e8219fbd1]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_D3dmd10expression7resolveFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x45b)[0x560e82084feb]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x898)[0x560e820d3e08]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x160f)[0x560e820db57f]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_D3dmd10expression7resolveFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x45b)[0x560e82084feb]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x898)[0x560e820d3e08]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x160f)[0x560e820db57f]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x122)[0x560e8207c352]
ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc83)[0x560e82091233]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP8ScopeExp+0xf8)[0x560e820d63c8]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x58b)[0x560e820da4fb]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x122)[0x560e8207c352]
ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc83)[0x560e82091233]
ldc2(_D3dmd9dtemplate15functionResolveFPS3dmd11declaration5MatchC3dmd7dsymbol7DsymbolS3dmd7globals3LocPS3dmd6dscope5ScopePS3dmd4root5array45__T5ArrayTC3dmd4root10rootobject10RootObjectZ5ArrayC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0x183)[0x560e820a8a73]
ldc2(_Z15resolveFuncCall3LocP5ScopeP7DsymbolP5ArrayIP10RootObjectEP4TypePS4_IP10ExpressionEi+0xfd)[0x560e81fe97bd]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x1e30)[0x560e820dbda0]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x1d03)[0x560e820dbc73]
ldc2(_ZN24StatementSemanticVisitor5visitEP15ReturnStatement+0x328)[0x560e821abfb8]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x122)[0x560e8207c352]
ldc2(_D3dmd10dsymbolsem24templateInstanceSemanticFC3dmd9dtemplate16TemplateInstancePS3dmd6dscope5ScopePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0xc83)[0x560e82091233]
ldc2(_D3dmd9dtemplate15functionResolveFPS3dmd11declaration5MatchC3dmd7dsymbol7DsymbolS3dmd7globals3LocPS3dmd6dscope5ScopePS3dmd4root5array45__T5ArrayTC3dmd4root10rootobject10RootObjectZ5ArrayC3dmd5mtype4TypePS3dmd4root5array40__T5ArrayTC3dmd10expression10ExpressionZ5ArrayZv+0x183)[0x560e820a8a73]
ldc2(_Z15resolveFuncCall3LocP5ScopeP7DsymbolP5ArrayIP10RootObjectEP4TypePS4_IP10ExpressionEi+0xfd)[0x560e81fe97bd]
ldc2(_D3dmd13expressionsem18resolvePropertiesXFPS3dmd6dscope5ScopeC3dmd10expression10ExpressionC3dmd10expression10ExpressionZC3dmd10expression10Expression+0x824)[0x560e820cf6d4]
ldc2(_Z17resolvePropertiesP5ScopeP10Expression+0x11)[0x560e81fe5201]
ldc2(_ZN16InferTypeVisitor5visitEP14ExpInitializer+0x6e)[0x560e82124ede]
ldc2(_ZN22DsymbolSemanticVisitor5visitEP14VarDeclaration+0x31c)[0x560e82086f9c]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP14DeclarationExp+0xa8)[0x560e820de6d8]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ForStatement+0x707)[0x560e8219f197]
ldc2(_ZN24StatementSemanticVisitor5visitEP14WhileStatement+0xaa)[0x560e8219e4ba]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_D3dmd10expression7resolveFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x45b)[0x560e82084feb]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x898)[0x560e820d3e08]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x160f)[0x560e820db57f]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN24StatementSemanticVisitor5visitEP14ScopeStatement+0xf2)[0x560e8219ded2]
ldc2(_ZN24StatementSemanticVisitor5visitEP11IfStatement+0x81d)[0x560e821a818d]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_D3dmd10expression7resolveFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x45b)[0x560e82084feb]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x898)[0x560e820d3e08]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP7CallExp+0x160f)[0x560e820db57f]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_D3dmd10expression7resolveFS3dmd7globals3LocPS3dmd6dscope5ScopeC3dmd7dsymbol7DsymbolbZC3dmd10expression10Expression+0x45b)[0x560e82084feb]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP13IdentifierExp+0x898)[0x560e820d3e08]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0x11a)[0x560e820e7fca]
ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x104e)[0x560e82151fae]
ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x29e)[0x560e820bf04e]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1e)[0x560e820e7dae]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0x11a)[0x560e820e7fca]
ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x104e)[0x560e82151fae]
ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x29e)[0x560e820bf04e]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1e)[0x560e820e7dae]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN15FuncDeclaration17functionSemantic3Ev+0xf1)[0x560e82042c21]
ldc2(_ZN15FuncDeclaration16functionSemanticEv+0x28d)[0x560e81ffd29d]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP9DotVarExp+0x11a)[0x560e820e7fca]
ldc2(_ZN10TypeStruct6dotExpEP5ScopeP10ExpressionP10Identifieri+0x104e)[0x560e82151fae]
ldc2(_D3dmd13expressionsem9semanticYFC3dmd10expression8DotIdExpPS3dmd6dscope5ScopeiZC3dmd10expression10Expression+0x29e)[0x560e820bf04e]
ldc2(_ZN25ExpressionSemanticVisitor5visitEP8DotIdExp+0x1e)[0x560e820e7dae]
ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x5c)[0x560e8219cd2c]
ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x6f)[0x560e8219d1ff]
ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1779)[0x560e8207e399]
ldc2(_ZN16Semantic3Visitor5visitEP20AggregateDeclaration+0x8e)[0x560e820863ee]
ldc2(_ZN16Semantic3Visitor5visitEP6Module+0x6d)[0x560e8207c9ad]
ldc2(_Z13mars_mainBodyR5ArrayIPKcES3_+0x1782)[0x560e82144af2]
ldc2(_Z7cppmainiPPc+0x2170)[0x560e8226a6a0]
ldc2(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv+0xf)[0x560e82344daf]
ldc2(_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv+0x14)[0x560e82344cf4]
ldc2(_d_run_main+0x203)[0x560e82344c13]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fb192c71b97]
ldc2(_start+0x2a)[0x560e81fde51a]
Segmentation fault (core dumped)
ldc2 failed with exit code 139.

On Saturday, 4 August 2018 at 18:12:05 UTC, Alex wrote:
> On Saturday, 4 August 2018 at 13:26:01 UTC, Nicholas Wilson wrote:
>>> 0  ldc2                     0x0000000106fcc4e7 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
>>> 1  ldc2                     0x0000000106fcb9ea llvm::sys::RunSignalHandlers() + 83
>>> 2  ldc2                     0x0000000106fcc90e SignalHandler(int) + 239
>>> 3  libsystem_platform.dylib 0x00007fff5992af5a _sigtramp + 26
>>> 4  libsystem_platform.dylib 0x000000015fcde600 _sigtramp + 104543936
>>> ldc2 failed with exit code -11.
>>>
>> Is this the entire stack trace? If dmd is also affected chances it is a frontend bug.
>
> Well, on MacOs - yes. On a Linux, it is longer:
>
> [snip]

That is a very long stacks trace and combined with the very short stack trace on OSX, this is probably a stack overflow.
1) Do you have any very deeply nested types/templates somewhere or somehow created a cyclic dependency in semantic analysis?
2) Can you try with a bigger stack (ulimit -s)? If it still fails then its probably 1.