When running the unittest program for druntime.

---
Program received signal SIGSEGV, Segmentation fault.
__memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:101

backtrace:
#0  __memset_avx2 () at ../sysdeps/x86_64/multiarch/memset-avx2.S:101
#1  0x00000000004d45a0 in gc.gc.GC.malloc(ulong, uint, ulong*, const(TypeInfo)) (this=..., size=8, bits=0, alloc_size=0x7fffffffd428, ti=0x714050 <TypeInfo_PS2rt3aaA4Impl.init$>) at ../../../../dev/libphobos/libd
runtime/gc/gc.d:459
#2  0x00000000004c5948 in gc_qalloc (sz=8, ba=0, ti=0x714050 <TypeInfo_PS2rt3aaA4Impl.init$>) at ../../../../dev/libphobos/libdruntime/gc/proxy.d:196
#3  0x00000000004450de in core.memory.GC.qalloc(ulong, uint, const(TypeInfo)) (sz=8, ba=0, ti=0x714050 <TypeInfo_PS2rt3aaA4Impl.init$>) at ../../../../dev/libphobos/libdruntime/core/memory.d:368
#4  0x0000000000420e31 in _d_newitemT (_ti=0x714050 <TypeInfo_PS2rt3aaA4Impl.init$>) at ../../../../dev/libphobos/libdruntime/rt/lifetime.d:1096
#5  0x0000000000411f6c in _aaGetX (aa=0x7ffff7ed2090, keyti=0x7191a0 <ClassInfo for core.thread.Thread>, valuesize=8, pkey=0x7fffffffd598) at ../../../../dev/libphobos/libdruntime/rt/aaA.d:172