February 11, 2019 [Issue 19666] New: Compiler executes illegal instruction casting array to struct pointer | ||||
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https://issues.dlang.org/show_bug.cgi?id=19666 Issue ID: 19666 Summary: Compiler executes illegal instruction casting array to struct pointer Product: D Version: D2 Hardware: x86_64 OS: Linux Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nobody@puremagic.com Reporter: andy.pj.hanson@gmail.com ``` struct StoreAny { enum size_t maxSize = (void*).sizeof; enum size_t maxAlign = (void*).alignof; align(maxAlign) ubyte[maxSize] store; @trusted this(T)(T value) { static assert(T.sizeof <= maxSize && T.alignof <= maxAlign); *(cast(T*) store) = value; } @trusted T as(T)() { return *(cast(T*) store); } } struct SomeStruct { int x; } enum StoreAny someEnum = StoreAny(SomeStruct()); void main() { } ``` Compiling this code causes the compiler to terminate with SIGILL. There is no error if I instantiate with a primitive, e.g. `StoreAny(0)`. -- |
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