https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104743
--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> --- > --- Comment #1 from Iain Buclaw <ibuclaw at gdcproject dot org> --- > Does anything change if you compile the test with > `-ftrivial-auto-var-init=zero` ? No, the test fails just the same. gdb shows Thread 2 received signal SIGBUS, Bus error. [Switching to Thread 1 (LWP 1)] _d_newitemU (_ti=0xffffffff7f1f3000) at /vol/gcc/src/hg/master/local/libphobos/libdruntime/rt/lifetime.d:1110 1110 *cast(TypeInfo*)(p + itemSize) = null; // the GC might not have cleared this area (gdb) bt #0 _d_newitemU (_ti=0xffffffff7f1f3000) at /vol/gcc/src/hg/master/local/libphobos/libdruntime/rt/lifetime.d:1110 #1 0x000000010007bd64 in rt.aaA.allocEntry(scope const(rt.aaA.Impl*), scope const(void*)) (aa=0xffffffff7f1f2000, pkey=0xffffffff7f1f0000) at /vol/gcc/src/hg/master/local/libphobos/libdruntime/rt/aaA.d:214 #2 0x000000010007cd14 in _d_assocarrayliteralTX (ti=0x100071db8 <initializer for TypeInfo_HS7pr9615217__unittest_L20_C7FNfZ15ThrowingElementi>, keys=..., vals=...) at /vol/gcc/src/hg/master/local/libphobos/libdruntime/rt/aaA.d:767 #3 0x000000010007b57c in object.aaLiteral!(pr96152.__unittest_L20_C7().ThrowingElement, int).aaLiteral(pr96152.__unittest_L20_C7().ThrowingElement[], int[]) (keys=..., values=...) at /vol/gcc/src/hg/master/local/libphobos/libdruntime/object.d:2868 ... 1: x/i $pc => 0x100087080 <_d_newitemU+100>: clrx [ %o0 + %i2 ] (gdb) p/x $o0 + $i2 $3 = 0xffffffff7f1f0054 i.e. the address isn't properly 8-byte aligned as required on a strict-alignment target like SPARC.
