Bug 22242 – ICE when an overload is aliased back into a mixin

Compiling this causes a segfault: mixin template Foo() { alias foo = typeof(this).foo; // (1) void foo(int a) { ubyte b; foo(b); } } struct S { void foo(ubyte a) { } mixin Foo f; alias foo = f.foo; } void main() { } It is order-dependent: if (1) is placed after foo's definition, the code compiles.

The segfault is caused by infinite recursion in dmd.func.overloadApply, which overflows the stack. Specifically, it is caused by this recursive call: https://github.com/dlang/dmd/blob/717a966b8c85751390ebc5fbc77302c1d876a0a5/src/dmd/func.d#L2758 ...which does not account for the possibility that a FuncAliasDeclaration's funcalias member may point to itself.

This seems to have been fixed in the latest version of the compiler. Closing as WORKSFORME. Please reopen if you can reproduce.