Bug 17124 – dmd segfaults on __traits(getMember, ...)

// test.d alias BS = BSPu; alias BS = BSPr; template BSPu() { } template BSPr() { } enum blah = is(typeof(__traits(getMember, test, "BS"))); running `dmd test.d` segfaults, here's the backtrace: * thread #1: tid = 0x42286e, 0x000000010008072e dmd`resolvePropertiesOnly(Scope*, Expression*) + 798, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x8) frame #0: 0x000000010008072e dmd`resolvePropertiesOnly(Scope*, Expression*) + 798 dmd`resolvePropertiesOnly: -> 0x10008072e <+798>: cmpb $0x5, 0x8(%rcx) 0x100080732 <+802>: jne 0x100080797 ; <+903> 0x100080734 <+804>: cmpl $0x0, 0x7c(%rdi) 0x100080738 <+808>: jne 0x10008074c ; <+828> (lldb) bt all * thread #1: tid = 0x42286e, 0x000000010008072e dmd`resolvePropertiesOnly(Scope*, Expression*) + 798, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x8) * frame #0: 0x000000010008072e dmd`resolvePropertiesOnly(Scope*, Expression*) + 798 frame #1: 0x00000001000f1555 dmd`TypeTypeof::resolve(Loc, Scope*, Expression**, Type**, Dsymbol**, bool) + 213 frame #2: 0x00000001000f1841 dmd`TypeTypeof::semantic(Loc, Scope*) + 65 frame #3: 0x00000001000e25b2 dmd`Type::trySemantic(Loc, Scope*) + 66 frame #4: 0x000000010009184e dmd`IsExp::semantic(Scope*) + 182 frame #5: 0x00000001000cbdbe dmd`ExpInitializer::inferType(Scope*) + 38 frame #6: 0x000000010003742e dmd`VarDeclaration::semantic(Scope*) + 334 frame #7: 0x00000001000585de dmd`Module::semantic(Scope*) + 118 frame #8: 0x00000001000df926 dmd`D4ddmd4mars7tryMainFmPPxaZi + 13494 frame #9: 0x0000000100003273 dmd`_Dmain + 39 frame #10: 0x00000001002438cc dmd`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv + 40 frame #11: 0x00000001002437f4 dmd`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv + 32 frame #12: 0x0000000100243871 dmd`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZv + 45 frame #13: 0x00000001002437f4 dmd`D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ7tryExecMFMDFZvZv + 32 frame #14: 0x0000000100243767 dmd`_d_run_main + 459 frame #15: 0x000000010000330c dmd`main + 16 frame #16: 0x00000001000018b4 dmd`start + 52

Neither 2.073 nor 2.074 alpha, with linux x86_64, crash with your code. Did you forget a line of code or something else ?

Can't reproduce it, either. Reopen, if new information.

how to fix it?

This issue needed : https://github.com/huntlabs/hunt-framework/issues/153

See here: https://issues.dlang.org/show_bug.cgi?id=21008.

I also cannot reproduce this. Why was this reopened?