struct Foo { float a, b; Foo opUnary(string op)() const { return this; } Foo opBinary(string op)(float) { return this; } } auto f1(T)(T a) { return 1; } auto f2(T)(T a) { return a * f1(a); } void main() {} unittest { auto a = Foo(0, 1); assert(f2(-a) == a); } I've reduce the code as much I thought possible, removal of anything else stops the ICE occuring. When compiling the above code, with the following command line arguments: `dmd -unittest -inline test.d` Displays `Internal error: backend/symbol.c 1036` Confirmed with Arch Linux and OSX.
Confirmed on Git HEAD (511b24a457)
Further reduced: struct Foo { float a, b; Foo opUnary(string op)() const { return this; } } auto f1(T)(T a) { return a; } auto f2(T)(T a) { return f1(a); } void main() {} unittest { auto a = Foo(0, 1); assert(f2(-a) == a); }
Does not require -unittest struct Foo { int a; float b; Foo func()() const { return this; } } auto f1()(Foo a) { return a; } void main() { auto a = Foo(0, 1); cast(void)(f1(a.func!()()) == a); } Produces this ast for main: Foo a = Foo(0, 1.00000F); cast(void)((Foo __inlineretval2 = Foo a = Foo __inlineretval1 = ref Foo this = a ; , (assert(&this, "null this") , this); , __inlineretval1; , a; , __inlineretval2).a == a.a && (Foo __inlineretval3 = Foo a = Foo __inlineretva l1 = ref Foo this = a; , (assert(&this, "null this") , this); , __inlineretval1; , a; , __inlineretval3).b == a.b); return 0; The most suspect thing is that __inlineretval1 is declared twice - the crash in symbol.c happens on this symbol with assert(s->Ssymnum == -1); - ie the symbol is already numbered.
https://github.com/D-Programming-Language/dmd/pull/3672
Commits pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/fe9bdcce89530fdefcff743bf50b6b6f9d913a7a fix Issue 11201 - ICE: (symbol.c) -inline stops compilation https://github.com/D-Programming-Language/dmd/commit/7ec843a6f5232e8eb53991c6b11b790d2cd61278 Merge pull request #3672 from 9rnsr/fix11201 Issue 11201 - ICE: (symbol.c) -inline stops compilation