https://d.puremagic.com/issues/show_bug.cgi?id=12044

           Summary: Invalid code gen causes segfault
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: jcrapuchettes@gmail.com


--- Comment #0 from Jonathan Crapuchettes <jcrapuchettes@gmail.com> 2014-01-30 13:40:00 PST ---
The following code example was tested with 2.063.2 and executes without error. If compiled with 2.064.2 or 2.065.0-b2, the example compiles, but segfaults when run.

In the example, commenting or changing most of the lines will allow 2.064.2+ to produce code that does not segfault.

Backtrace output from gdb at point of segfault:
----------------
(gdb) bt
#0  0x000000000042d9eb in _d_arrayliteralTX ()
#1  0x0000000000429dcd in valid_sparse.main() (this=0x0) at valid_sparse.d:32
#2  0x000000000042a57f in valid_sparse.Test.__T8opBinaryVAyaa2_696eZ.opBinary()
(this=0x7fffffffdad8, fun=...) at valid_sparse.d:42
#3  0x0000000000429da2 in D main () at valid_sparse.d:26
#4  0x000000000042cf20 in rt.dmain2._d_run_main() ()
#5  0x000000000042ce7a in rt.dmain2._d_run_main() ()
#6  0x000000000042cee0 in rt.dmain2._d_run_main() ()
#7  0x000000000042ce7a in rt.dmain2._d_run_main() ()
#8  0x000000000042cdfb in _d_run_main ()
#9  0x000000000042ae25 in main ()

Example:
----------------
import std.array;
import std.traits;
import std.algorithm;

struct BasicNode(T) { T id; }
struct Hierarchy(Code)
{
    struct Node { Code id; }

    Node[] allNodes;

    bool opEquals(OtherH)(OtherH )
    {
        allNodes.map!("a.id").array;
    }
}

struct Test
{
    void opBinary(string op)(void delegate() fun)
    {
        fun();
    }
}

void main()
{
    Test() in
    {
        enum BlaEnum : ubyte { All }

        auto Blas = [EnumMembers!BlaEnum].map!(a => BasicNode!BlaEnum(a));

        Hierarchy!(BlaEnum) H_T;
    };
}

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Vladimir Panteleev <thecybershadow@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |thecybershadow@gmail.com


--- Comment #1 from Vladimir Panteleev <thecybershadow@gmail.com> 2014-01-31 04:45:14 EET ---
On Win32, it compiles and runs. On Win64 there is a linker error (duplicate
COMDAT).

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--- Comment #2 from Vladimir Panteleev <thecybershadow@gmail.com> 2014-01-31 05:02:24 EET ---
The linker error starts appearing after this pull:

https://github.com/D-Programming-Language/phobos/pull/1305

However, that pull likely uncovered the problem rather than introduced a regression.

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--- Comment #3 from Vladimir Panteleev <thecybershadow@gmail.com> 2014-02-04 23:14:56 EET ---
I reran the bisection on Linux/64, where I could reproduce the original problem. But the bisection identified the same change as the regression: https://github.com/D-Programming-Language/phobos/pull/1305

I'll try to reduce away the Phobos dependency.

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Vladimir Panteleev <thecybershadow@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code


--- Comment #4 from Vladimir Panteleev <thecybershadow@gmail.com> 2014-02-05 01:00:09 EET ---
Reduced test case:

//////////////////////////////////////////
struct S(T)
{
    void f()()
    {
        new T[1];
    }

    bool opEquals(O)(O)
    {
        f();
    }
}

void main()
{
    ()
    {
        enum E { e }
        auto arr = [E.e];
        S!E s;
    }
    ();
}
//////////////////////////////////////////

On Win64, this produces the error:
test.exe.obj : fatal error LNK1179: invalid or corrupt file: duplicate COMDAT
'_D45TypeInfo_AE4test4mainFZv9__lambda1FNaNbNfZv1E6__initZ'

As I suspected, the Phobos change only uncovered a compiler problem.

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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugzilla@digitalmars.com


--- Comment #5 from Walter Bright <bugzilla@digitalmars.com> 2014-02-14 01:52:49 PST ---
https://github.com/D-Programming-Language/dmd/pull/3257

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--- Comment #6 from github-bugzilla@puremagic.com 2014-02-14 17:45:08 PST ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/6a0618afd2c73dab691ed5d66366ec0529377abf fix Issue 12044 - Invalid code gen causes segfault

https://github.com/D-Programming-Language/dmd/commit/4529423afa9fdd437415652ebf5f7d436747910c Merge pull request #3257 from WalterBright/fix12044

fix Issue 12044 - Invalid code gen causes segfault

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Kenji Hara <k.hara.pg@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


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