Hi Robert, I have published the test case on github. Please find the links. Please let me know if you need any information. I am ready to provide and support.
https://github.com/MariappanBalraj/test_cgo_panic https://github.com/MariappanBalraj/test_cgo_panic.git https://github.com/MariappanBalraj/test_cgo_panic/archive/refs/heads/main.zip Best Regards Mariappan On Mon, Apr 3, 2023 at 9:50 AM Robert Engels <reng...@ix.netcom.com> wrote: > I would start by publishing a small reproducible test case on github that > fully compiles that demonstrates the issue. > > On Apr 2, 2023, at 10:59 PM, mariappan balraj <mariappan.bal...@gmail.com> > wrote: > > > Hello Go Experts, > > It is good if someone can help on this? > > Best Regards > Mariappan > On Sat, Apr 1, 2023 at 7:45 AM mariappan balraj < > mariappan.bal...@gmail.com> wrote: > >> Hello Go experts, >> >> Could someone please help to resolve this issue? >> >> Best Regards >> Mariappan >> >> On Thu, Mar 30, 2023 at 2:52 PM mariappan balraj < >> mariappan.bal...@gmail.com> wrote: >> >>> Hello Go Experts, >>> >>> When panic() is called from Go function, in the below call sequence, >>> runtime.unwindm() [which is defer function of runtime.cgocallbackg1] is >>> called. This function is unwinding the system stack. Later, as part of the >>> function addOneOpenDeferFrame(), systemstack() is called to run a function >>> in the system stack. This will use the stack which is allocated for C >>> function calls. This makes stack unwinding impossible in case of panic() is >>> called. Can someone please help me to fix this issue? >>> >>> (dlv) bt >>> 0 0x00000000004054e6 in runtime.unwindm >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:326 >>> 1 0x0000000000405446 in runtime.cgocallbackg1.func3 >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:304 >>> 2 0x00000000004340c8 in runtime.deferCallSave >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:796 >>> 3 0x0000000000433fa5 in runtime.runOpenDeferFrame >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:769 >>> 4 0x0000000000434332 in runtime.gopanic >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:884 >>> 5 0x00000000004642a7 in main.Test4 >>> at ./export.go:7 >>> at ./export.go:7 >>> 6 0x000000000046431c in _cgoexp_78b81bbf688e_Test4 >>> at _cgo_gotypes.go:61 >>> 7 0x000000000040535b in runtime.cgocallbackg1 >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:315 >>> 8 0x0000000000405079 in runtime.cgocallbackg >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:234 >>> 9 0x0000000000461b0f in runtime.cgocallbackg >>> at <autogenerated>:1 >>> 10 0x000000000045f3f4 in runtime.cgocallback >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:998 >>> 11 0x00000000004641bd in crosscall2 >>> at >>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgo/asm_amd64.s:30 >>> 12 0x0000000000464386 in C.Test4 >>> at /tmp/go-build/_cgo_export.c:33 >>> 13 0x0000000000464432 in C.test1 >>> at ./hello.go:9 >>> 14 0x000000000046444d in C.test2 >>> at ./hello.go:14 >>> 15 0x0000000000464468 in C.test3 >>> 15 0x0000000000464468 in C.test3 >>> at ./hello.go:19 >>> 16 0x00000000004644a7 in C._cgo_78b81bbf688e_Cfunc_test3 >>> at /tmp/go-build/cgo-gcc-prolog:49 >>> 17 0x000000000045f2e4 in runtime.asmcgocall >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:848 >>> 18 0x000000000046448a in C._cgo_78b81bbf688e_Cfunc_test3 >>> at /tmp/go-build/cgo-gcc-prolog:44 >>> 19 0x0000000000404f0a in runtime.cgocall >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:167 >>> 20 0x0000000000464245 in main._Cfunc_test3 >>> at _cgo_gotypes.go:39 >>> 21 0x00000000004642d7 in main.main >>> at ./hello.go:33 >>> 22 0x0000000000437073 in runtime.main >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/proc.go:250 >>> 23 0x000000000045f5e1 in runtime.goexit >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:1598 >>> >>> 254 func cgocallbackg1(fn, frame unsafe.Pointer, ctxt uintptr) { >>> 304 defer unwindm(&restore) >>> >>> 326 func unwindm(restore *bool) { >>> 327 if *restore { >>> 328 // Restore sp saved by cgocallback during >>> 329 // unwind of g's stack (see comment at top of file). >>> 330 mp := acquirem() >>> 331 sched := &mp.g0.sched >>> 332 sched.sp = *(*uintptr)(unsafe.Pointer(sched.sp + >>> alignUp(sys.MinFrameSize, sys.StackAlign))) >>> >>> (dlv) >>> > runtime.addOneOpenDeferFrame() >>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:642 (PC: >>> 0x433a45) >>> Warning: debugging optimized function >>> 637: func addOneOpenDeferFrame(gp *g, pc uintptr, sp unsafe.Pointer) { >>> 638: var prevDefer *_defer >>> 639: if sp == nil { >>> 640: prevDefer = gp._defer >>> 641: pc = prevDefer.framepc >>> => 642: sp = unsafe.Pointer(prevDefer.sp) >>> 643: } >>> 644: systemstack(func() { >>> 645: gentraceback(pc, uintptr(sp), 0, gp, 0, nil, >>> 0x7fffffff, >>> 646: func(frame *stkframe, unused >>> unsafe.Pointer) bool { >>> 647: if prevDefer != nil && >>> prevDefer.sp == frame.sp { >>> (dlv) bt >>> 0 0x0000000000433a45 in runtime.addOneOpenDeferFrame >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:642 >>> 1 0x0000000000434357 in runtime.gopanic >>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:886 >>> 2 0x00000000004642a7 in main.Test4 >>> at ./export.go:7 >>> >>> On Tue, Mar 28, 2023 at 4:14 PM mariappan balraj < >>> mariappan.bal...@gmail.com> wrote: >>> >>>> Hello Go Experts, >>>> >>>> I am observing system stack corruption when panic() is called from go >>>> function. When panic is called from Test4(), as part of >>>> runtime.systemstack_switch(), the RSP and RBP is set in such a way that it >>>> will corrupt the stack. >>>> >>>> Rbp = 0x00007ffdb188bd20===> This should be less than 0x7ffdb188bc50. >>>> But it is set to the value which is already used for CGO calls. So it is >>>> making the system stack to corrupt. When the core file is generated, it >>>> makes it unable to debug from the core file using dlv. Can someone please >>>> help on this issue? >>>> >>>> RBP 0x7ffdb188bc50 RA 0x45f3f4 runtime.cgocallback >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s 1003 >>>> RBP 0x7ffdb188bca0 RA 0x4641bd crosscall2 >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgo/asm_amd64.s 32 >>>> RBP 0x7ffdb188bcd0 RA 0x464386 C.Test4 /tmp/go-build/_cgo_export.c 35 >>>> RBP 0x7ffdb188bce0 RA 0x464432 C.test1 >>>> /home/soomohan/mbalraj/test/hello.go 10 >>>> RBP 0x7ffdb188bd00 RA 0x46444d C.test2 >>>> /home/soomohan/mbalraj/test/hello.go 15 >>>> RBP 0x7ffdb188bd20 RA 0x464468 C.test3 >>>> /home/soomohan/mbalraj/test/hello.go 20 >>>> RBP 0x7ffdb188bd50 RA 0x4644a7 C._cgo_78b81bbf688e_Cfunc_test3 >>>> /tmp/go-build/cgo-gcc-prolog 51 >>>> >>>> go version >>>> go version go1.20.2 linux/amd64 >>>> >>>> //hello.go >>>> package main >>>> >>>> /* >>>> #include <stdio.h> >>>> >>>> extern void Test4(void); >>>> >>>> void test1(void) { >>>> Test4(); >>>> } >>>> >>>> void test2(void) { >>>> int val = 2; >>>> test1(); >>>> } >>>> >>>> void test3(void) { >>>> int val = 3; >>>> test2(); >>>> } >>>> >>>> void test4(void) { >>>> printf("Test4()"); >>>> } >>>> */ >>>> import "C" >>>> >>>> func Test5() { >>>> C.test4() >>>> } >>>> >>>> func main() { >>>> C.test3() >>>> } >>>> >>>> //export.go >>>> package main >>>> >>>> import "C" >>>> >>>> //export Test4 >>>> func Test4() { >>>> panic("Panic inside Test4") >>>> //Test5() >>>> } >>>> >>>> I have written the following script test.start to debug this issue >>>> further in DLV. >>>> def command_goroutine_start_line(args): >>>> regs = registers().Regs >>>> rip = 0 >>>> for reg in regs: >>>> if reg.Name == "Rbp": >>>> rbp = int(reg.Value, 16) >>>> elif reg.Name == "Rip": >>>> rip = int(reg.Value, 16) >>>> >>>> da = disassemble(StartPC=rip, EndPC=rip+1).Disassemble >>>> print("RBP 0x%x RIP 0x%x %s %s %s" % (rbp, rip, >>>> da[0].Loc.Function.Name_, da[0].Loc.File, da[0].Loc.Line)) >>>> >>>> while True: >>>> mem = examine_memory(rbp, 8).Mem >>>> val = 0 >>>> for i in range(len(mem)): >>>> val <<= 8 >>>> val += mem[len(mem) - i - 1] >>>> prbp = val >>>> >>>> mem = examine_memory(rbp + 8, 8).Mem >>>> val = 0 >>>> for i in range(len(mem)): >>>> val <<= 8 >>>> val += mem[len(mem) - i - 1] >>>> ra = val >>>> >>>> da = disassemble(StartPC=ra, EndPC=ra+1).Disassemble >>>> print("RBP 0x%x RA 0x%x %s %s %s" % (prbp, ra, >>>> da[0].Loc.Function.Name_, da[0].Loc.File, da[0].Loc.Line)) >>>> if prbp == 0: >>>> break >>>> rbp = prbp >>>> >>>> def main(): >>>> dlv_command("config alias goroutine_start_line gsl") >>>> >>>> (dlv)bt >>>> RBP 0x0 RA 0x45f5e1 runtime.goexit >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s 1599 >>>> >>>> 0 0x0000000000433b04 in runtime.addOneOpenDeferFrame.func1 >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:646 >>>> 1 0x000000000045f0c0 in runtime.systemstack_switch >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:463 >>>> 2 0x0000000000433a89 in runtime.addOneOpenDeferFrame >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:644 >>>> 3 0x0000000000434357 in runtime.gopanic >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:886 >>>> 4 0x00000000004642a7 in main.Test4 >>>> at ./export.go:7 >>>> 5 0x000000000046431c in _cgoexp_78b81bbf688e_Test4 >>>> at _cgo_gotypes.go:61 >>>> 6 0x000000000040535b in runtime.cgocallbackg1 >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:315 >>>> 7 0x0000000000405079 in runtime.cgocallbackg >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:234 >>>> 8 0x0000000000461b0f in runtime.cgocallbackg >>>> at <autogenerated>:1 >>>> 9 0x000000000045f3f4 in runtime.cgocallback >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:998 >>>> 10 0x0000000000000001 in ??? >>>> at ?:-1 >>>> 11 0x0000000000464386 in C.Test4 >>>> at /tmp/go-build/_cgo_export.c:33 >>>> 12 0x0000000000464432 in C.test1 >>>> at ./hello.go:9 >>>> 13 0x000000000046444d in C.test2 >>>> at ./hello.go:14 >>>> 14 0x0000000000464468 in C.test3 >>>> at ./hello.go:19 >>>> 15 0x00000000004644a7 in C._cgo_78b81bbf688e_Cfunc_test3 >>>> 15 0x00000000004644a7 in C._cgo_78b81bbf688e_Cfunc_test3 >>>> at /tmp/go-build/cgo-gcc-prolog:49 >>>> 16 0x000000000045f2e4 in runtime.asmcgocall >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:848 >>>> 17 0x000000000046448a in C._cgo_78b81bbf688e_Cfunc_test3 >>>> at /tmp/go-build/cgo-gcc-prolog:44 >>>> 18 0x0000000000404f0a in runtime.cgocall >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:167 >>>> 19 0x0000000000464245 in main._Cfunc_test3 >>>> at _cgo_gotypes.go:39 >>>> 20 0x00000000004642d7 in main.main >>>> at ./hello.go:33 >>>> 21 0x0000000000437073 in runtime.main >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/proc.go:250 >>>> 22 0x000000000045f5e1 in runtime.goexit >>>> at >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:1598 >>>> >>>> (dlv)source test.star >>>> (dlv)gsl >>>> (dlv) gsl >>>> RBP 0xc000048c68 RIP 0x433b04 runtime.addOneOpenDeferFrame.func1 >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go 646 >>>> RBP 0xc000048d28 RA 0x434357 runtime.gopanic >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go 905 >>>> RBP 0xc000048d48 RA 0x4642a7 main.Test4 >>>> /home/soomohan/mbalraj/test/export.go 7 >>>> RBP 0xc000048d58 RA 0x46431c _cgoexp_78b81bbf688e_Test4 _cgo_gotypes.go >>>> 62 >>>> RBP 0xc000048e18 RA 0x40535b runtime.cgocallbackg1 >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go 323 >>>> RBP 0xc000048ea8 RA 0x405079 runtime.cgocallbackg >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go 240 >>>> RBP 0xc000048ed0 RA 0x461b0f runtime.cgocallbackg <autogenerated> 1 >>>> RBP 0x7ffdb188bc50 RA 0x45f3f4 runtime.cgocallback >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s 1003 >>>> RBP 0x7ffdb188bca0 RA 0x4641bd crosscall2 >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgo/asm_amd64.s 32 >>>> RBP 0x7ffdb188bcd0 RA 0x464386 C.Test4 /tmp/go-build/_cgo_export.c 35 >>>> RBP 0x7ffdb188bce0 RA 0x464432 C.test1 >>>> /home/soomohan/mbalraj/test/hello.go 10 >>>> RBP 0x7ffdb188bd00 RA 0x46444d C.test2 >>>> /home/soomohan/mbalraj/test/hello.go 15 >>>> RBP 0x7ffdb188bd20 RA 0x464468 C.test3 >>>> /home/soomohan/mbalraj/test/hello.go 20 >>>> RBP 0x7ffdb188bd50 RA 0x4644a7 C._cgo_78b81bbf688e_Cfunc_test3 >>>> /tmp/go-build/cgo-gcc-prolog 51 >>>> RBP 0xc000048f38 RA 0x45f2e4 runtime.asmcgocall >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s 852 >>>> RBP 0xc000048f60 RA 0x464245 main._Cfunc_test3 _cgo_gotypes.go 40 >>>> RBP 0xc000048f70 RA 0x4642d7 main.main >>>> /home/soomohan/mbalraj/test/hello.go 33 >>>> RBP 0xc000048fd0 RA 0x437073 runtime.main >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/proc.go 260 >>>> RBP 0x0 RA 0x45f5e1 runtime.goexit >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s 1599 >>>> >>>> (dlv)si >>>> >>>> (dlv)bt >>>> 0 0x000000000045587f in runtime.gentraceback >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/traceback.go:32 >>>> 1 0x000000000045f0c0 in runtime.systemstack_switch >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:463 >>>> 2 0x0000000000433a89 in runtime.addOneOpenDeferFrame >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:644 >>>> 3 0x0000000000434357 in runtime.gopanic >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:886 >>>> 4 0x00000000004642a7 in main.Test4 >>>> at ./export.go:7 >>>> 5 0x000000000046431c in _cgoexp_78b81bbf688e_Test4 >>>> at _cgo_gotypes.go:61 >>>> 6 0x000000000040535b in runtime.cgocallbackg1 >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:315 >>>> 7 0x0000000000405079 in runtime.cgocallbackg >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:234 >>>> 8 0x0000000000461b0f in runtime.cgocallbackg >>>> at <autogenerated>:1 >>>> 9 0x000000000045f3f4 in runtime.cgocallback >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:998 >>>> 10 0x0000000000000001 in ??? >>>> at ?:-1 >>>> 11 0x0000000000464386 in C.Test4 >>>> at /tmp/go-build/_cgo_export.c:33 >>>> 12 0x0000000000464432 in C.test1 >>>> at ./hello.go:9 >>>> 13 0x000000000046444d in C.test2 >>>> at ./hello.go:14 >>>> 14 0x0000000000464468 in C.test3 >>>> at ./hello.go:19 >>>> 15 0x0000000000433b4b in runtime.addOneOpenDeferFrame.func1 >>>> 15 0x0000000000433b4b in runtime.addOneOpenDeferFrame.func1 >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/panic.go:645 >>>> 16 0x000000000045f129 in runtime.systemstack >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:496 >>>> 17 0x0000000000461da5 in runtime.newproc >>>> at <autogenerated>:1 >>>> 18 0x00000000004cc720 in ??? >>>> at ?:-1 >>>> 19 0x000000000046431c in _cgoexp_78b81bbf688e_Test4 >>>> at _cgo_gotypes.go:61 >>>> 20 0x000000000040535b in runtime.cgocallbackg1 >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:315 >>>> 21 0x0000000000405079 in runtime.cgocallbackg >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:234 >>>> 22 0x0000000000461b0f in runtime.cgocallbackg >>>> at <autogenerated>:1 >>>> 23 0x000000000045f3f4 in runtime.cgocallback >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:998 >>>> 24 0x000000000045f0c0 in runtime.systemstack_switch >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:463 >>>> 25 0x0000000000404f0a in runtime.cgocall >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/cgocall.go:167 >>>> 26 0x0000000000464245 in main._Cfunc_test3 >>>> at _cgo_gotypes.go:39 >>>> 27 0x00000000004642d7 in main.main >>>> at ./hello.go:33 >>>> 28 0x0000000000437073 in runtime.main >>>> at /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/proc.go:250 >>>> 29 0x000000000045f5e1 in runtime.goexit >>>> at >>>> /home/soomohan/mbalraj/GO/go1.20.2/go/src/runtime/asm_amd64.s:1598 >>>> >>>> (dlv) regs >>>> (dlv) regs >>>> Rip = 0x000000000045587f >>>> Rsp = 0x00007ffdb188ba08 >>>> Rax = 0x000000000040535b >>>> Rbx = 0x000000c000048d68 >>>> Rcx = 0x0000000000000000 >>>> Rdx = 0x0000000000433b60 >>>> Rsi = 0x0000000000000000 >>>> Rdi = 0x000000c0000061a0 >>>> Rbp = 0x00007ffdb188bd20 >>>> R8 = 0x0000000000000000 >>>> R9 = 0x000000007fffffff >>>> R10 = 0x00007ffdb188bd80 >>>> R11 = 0x0000000000000000 >>>> R12 = 0x00007ffdb188ba88 >>>> R13 = 0x000000c000048c18 >>>> R14 = 0x00000000004cc720 >>>> R15 = 0x0000000000000000 >>>> Rflags = 0x0000000000000246 [PF ZF IF IOPL=0] >>>> Es = 0x0000000000000000 >>>> Cs = 0x0000000000000033 >>>> Ss = 0x000000000000002b >>>> Ds = 0x0000000000000000 >>>> Fs = 0x0000000000000000 >>>> Gs = 0x0000000000000000 >>>> Fs_base = 0x000015128ba66740 >>>> Gs_base = 0x0000000000000000 >>>> >>>> Best Regards >>>> Mariappan >>>> >>> -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/CAKKWi6TOAChrRs64UBrNJSPFdFkYHhWiHPsDzu%2BMKPck9BOhVQ%40mail.gmail.com > <https://groups.google.com/d/msgid/golang-nuts/CAKKWi6TOAChrRs64UBrNJSPFdFkYHhWiHPsDzu%2BMKPck9BOhVQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. 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