runtime: Stack crashes in runtime.gentraceback on darwin-amd64 #6061
Description
runtime.Stack crashes now on darwin-amd64. Linux is fine. $ hg id 2fb249d994cb tip $ go test -v -run=ClientInsecure net/http === RUN TestClientInsecureTransport exit status 3 FAIL net/http 0.150s This doesn't break the build dashboard, because the dashboard runs the tests in -short mode, and this failure is only triggered in long mode. GOTRACEBACK doesn't seem to help here. In gdb on the Mac, it says: Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000 [Switching to process 56394 thread 0x1703] 0x00000000000205bd in runtime.gentraceback (pc0=Unhandled dwarf expression opcode 0x9c ) at /Users/bradfitz/go/src/pkg/runtime/traceback_x86.c:47 47 frame.pc = *(uintptr*)frame.sp;