Bug 6177 – Regression(2.053): ICE backend/cgcs.c: struct with destructor in assoc. array or typesafe variadic functions

I am hitting what I believe is a dmd bug when I try to insert into an AA that points to a struct that contains a struct with a destructor. The following code yields an error: struct Parent { struct Child { AnotherStruct another; } struct AnotherStruct { ~this() {} } void fun() { map[0] = Selection.init; } Child[int] map; } void main() {} --- dmd -w map_test.d Internal error: backend/cgcs.c 162 Note: I am using the latest master.

Where is Selection?

(In reply to comment #1) > Where is Selection? Oops, Sorry. It should be Child.init. Was trying to simplify my Select/Socket project that uses struct for RAII and forgot to remove all the domain specific references...

Reduced: ----------------------------------------- struct Bug6177 { ~this() {} } void main() { cast(void) [0: Bug6177.init]; } ----------------------------------------- Internal error: backend/cgcs.c 162 ----------------------------------------- Strangely, the error does not appear when -O *is* supplied.

This is a regression introduced somewhere between 2.052 and 2.053 (for Mac OS X).

(In reply to comment #3) > Strangely, the error does not appear when -O *is* supplied. Very nice, my code compiles with -O. I'll use that as a work around for now!

The regression was introduced in commit 0857. https://github.com/D-Programming-Language/dmd/commit/085715a2cdf3c6c490654b2fa1a48ae58858d2d9

I'm getting the very same ICE with the following code: struct F { ~this() {} } struct G { this(F[] p...) {} } void main() { F c; G g = G(c); } DMD v2.054

I'm getting this when trying to compile the Juno library with the latest DMD source. The crash there seems to reduce to: //////////////// struct foo { ~this() { } } void bar(foo[] args...) { } void main() { bar(); } //////////////// It's ok if i compile it with -O.