Exception generated intermittently by using Prompt #50
Comments
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I've never seen that particular crash before. What version of Windows, what version of Go? I've got two theories, neither one of which is particularly likely:
The first one should be easy to test by installing the hotfix. The second one is slightly trickier to test; the Go runtime doesn't have a way to pin memory, so the long-term fix probably involves calls to HeapAlloc. |
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I just updated to Go 1.5 on one of my Windows machines, and I haven't been able to reproduce the issue with a simple test case. Do you have a complete standalone program that reproduces the crash? |
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Hi Peter We are using go 1.4.2, windows 7 We can't currently upgrade 1.4.2 at this time. We can't reliably reproduce the problem it appears to happen some what randomly either right away or after many hours of use. We have a small console program that makes use of a modified version of this library https://github.com/gobs/cmd. Which internally calls liner. Their example calls Prompt just like we are. After that you can interact with the prompt and after some time we get the stack trace I posted in this initial issue. |
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How long is "some time"? Are there particular commands that trigger the stack trace? I just spent a few minutes feeding your example garbage input, and I haven't seen a stack trace yet. |
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A long time can be somewhere around 12 hours of idleness then enter a normal command and boom. Like I said we don't have a particular use case to reproduce this. |
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Please try the new "heap" branch and let me know if it fixes the issue. |
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@neitzj Ping? |
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Peter. Hi I was away on vacation. I will pull the heap branch and give this On Mon, Oct 5, 2015 at 8:08 AM, Peter Harris notifications@github.com
Jonathan Neitz Suite 208, 1210 – 20th Ave SE Mountain Daylight Time (GMT – 6:00) Office: *+1 403 270 7159 <%2B1%C2%A0403%20270%207159>* Fax: *+1 403 270 2771 <%2B1%C2%A0403%20270%202771>* web: http://www.calgaryscientific.com http://www.calgaryscientific.com/ If you believe you have received this electronic transmission in error, |
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@neitzj Ping? |
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No response for months. I've never been able to reproduce this. All usages in liner conform to the most recently published guidelines (C never holds onto a pointer, and there are no pointers embedded in any memory passed to C). Therefore, I presume this was caused by something else. Please re-open if you have more evidence. |
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FWIW, I encountered a similar looking crash to this in delve: go-delve/delve#2869. |
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Possibly fixed by 8b893ef |
Hi we are making use of your liner library in a command line tool we are working. We have noticed that we are getting intermittent crashes with the following stack trace. I was hoping you might be able to shed some light on the problem. Thanks.
pureweb >Exception 0xc0000005 0x1 0xc082063988 0x7720c4d0
PC=0x7720c4d0
signal arrived during cgo execution
syscall.(_Proc).Call(0xc08208bf20, 0xc0820479c0, 0x4, 0x4, 0x1, 0x0, 0x0, 0x0)
c:/go/src/syscall/dll_windows.go:136 +0x5c2
syscall.(_LazyProc).Call(0xc082005ef0, 0xc0820479c0, 0x4, 0x4, 0x1, 0x0, 0x0, 0x
0)
c:/go/src/syscall/dll_windows.go:279 +0x74
github.com/peterh/liner.(_State).readNext(0xc0820680a0, 0x0, 0x0, 0x0, 0x0)
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/github.com/peterh/liner/inp
ut_windows.go:160 +0x182
github.com/peterh/liner.(_State).Prompt(0xc0820680a0, 0x7787b0, 0x9, 0x0, 0x0, 0
x0, 0x0)
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/github.com/peterh/liner/lin
e.go:492 +0x358
github.com/gobs/cmd.(*Cmd).CmdLoop(0xc082068000)
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/github.com/gobs/cmd/cmd.go:
564 +0xb1
main.main()
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/calgaryscientific.com/purew
eb-cli/main.go:70 +0xaaa
goroutine 5 [syscall, 1110 minutes]:
os/signal.loop()
c:/go/src/os/signal/signal_unix.go:21 +0x26
created by os/signal.init-+1
c:/go/src/os/signal/signal_unix.go:27 +0x3c
goroutine 13 [chan receive, 1110 minutes]:
main.func-+001()
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/calgaryscientific.com/purew
eb-cli/main.go:57 +0x74
created by main.main
E:/bamboobuilds/PWEB-PMGN-WIN/src/gocode/src/calgaryscientific.com/purew
eb-cli/main.go:62 +0xa30
goroutine 56 [IO wait, 127 minutes]:
net.(_pollDesc).Wait(0xc08207a170, 0x72, 0x0, 0x0)
c:/go/src/net/fd_poll_runtime.go:84 +0x4e
net.(_ioSrv).ExecIO(0xc082040148, 0xc08207a060, 0x75a5b0, 0x7, 0x7f8090, 0x0, 0x
0, 0x0)
c:/go/src/net/fd_windows.go:188 +0x305
net.(_netFD).Read(0xc08207a000, 0xc082011000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
c:/go/src/net/fd_windows.go:470 +0x180
net.(_conn).Read(0xc082040168, 0xc082011000, 0x1000, 0x1000, 0x0, 0x0, 0x0)
c:/go/src/net/net.go:121 +0xe3
net/http.noteEOFReader.Read(0x283998, 0xc082040168, 0xc082028058, 0xc082011000,
0x1000, 0x1000, 0x6bb9a0, 0x0, 0x0)
c:/go/src/net/http/transport.go:1270 +0x75
net/http.(_noteEOFReader).Read(0xc082007480, 0xc082011000, 0x1000, 0x1000, 0xc08
2012000, 0x0, 0x0)
:125 +0xdb
bufio.(_Reader).fill(0xc082042de0)
c:/go/src/bufio/bufio.go:97 +0x1d5
bufio.(_Reader).Peek(0xc082042de0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0)
c:/go/src/bufio/bufio.go:132 +0xf7
net/http.(_persistConn).readLoop(0xc082028000)
c:/go/src/net/http/transport.go:842 +0xab
created by net/http.(*Transport).dialConn
c:/go/src/net/http/transport.go:660 +0xca6
goroutine 57 [select, 127 minutes]:
net/http.(_persistConn).writeLoop(0xc082028000)
c:/go/src/net/http/transport.go:945 +0x424
created by net/http.(_Transport).dialConn
c:/go/src/net/http/transport.go:661 +0xcc3
rax 0x1
rbx 0x1
rcx 0x7746ddda
rdx 0x0
rdi 0x0
rsi 0x0
rbp 0x8f8820
rsp 0x6fcd0
r8 0x6fc98
r9 0x8f8820
r10 0x0
r11 0x246
r12 0xc082063988
r13 0xc0820639ac
r14 0x20
r15 0x10
rip 0x7720c4d0
rflags 0x10246
cs 0x33
fs 0x53
gs 0x2b
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