Bug 12271 – Undefined reference linker error with __traits(compiles) that returns false.

I haven't been able to reduce this further, and while I assume it's the __traits(compiles) that causes this, I could be wrong. Note that the __traits(compiles) should always fail. Sample: struct Symbol { } struct TypeMetadata { } void createMetadata(Type)() { if(__traits(compiles, getType!Type)) { } } void getType(T)() { Symbol = getSymbol!T; } Symbol getSymbol(Args...)() { Symbol result(); return result; } void main() { createMetadata!TypeMetadata; } Output: ogivm:~$ rdmd -v test.d binary /usr/bin/dmd version v2.065-devel-0f04b0b config /usr/bin/dmd.conf parse test importall test import object (/home/kapps/dev/druntime/import/object.di) semantic test entry main test.d semantic2 test semantic3 test code test function D main function test.createMetadata!(TypeMetadata).createMetadata function test.getSymbol!(TypeMetadata).getSymbol gcc /tmp/.rdmd-1000/rdmd-test.d-65EE17DBD03E4141D553B0B773C006B9/objs/test.o -o /tmp/.rdmd-1000/rdmd-test.d-65EE17DBD03E4141D553B0B773C006B9/test.tmp -m64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/i386-linux-gnu -Xlinker --no-warn-search-mismatch -Xlinker --export-dynamic -l:libphobos2.a -lpthread -lm -lrt /tmp/.rdmd-1000/rdmd-test.d-65EE17DBD03E4141D553B0B773C006B9/objs/test.o: In function `_D4test35__T9getSymbolTS4test12TypeMetadataZ9getSymbolFNaZS4test6Symbol': test.d:(.text._D4test35__T9getSymbolTS4test12TypeMetadataZ9getSymbolFNaZS4test6Symbol+0x8): undefined reference to `_D4test35__T9getSymbolTS4test12TypeMetadataZ9getSymbolFNaZS4test6Symbol6resultMFZS4test6Symbol' collect2: error: ld returned 1 exit status --- errorlevel 1

This appears to be fixed in git master.