$ go version
go version devel +8cd191b Sat May 30 12:21:56 2015 +0000 linux/amd64
$ uname -a | awk '$2="host"'
Linux host 3.13.0-52-generic #86~precise1-Ubuntu SMP Tue May 5 18:08:21 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I have a process that receives data over a few hundred concurrent TCP connections and writes them to files. It's been crashing on recent versions of tip (it was stable on 1.4.1).
fatal error: deferproc: d.panic != nil after newdefer
runtime stack:
runtime.throw(0x8e46f0, 0x28)
/usr/local/go/src/runtime/panic.go:527 +0x96
runtime.deferproc.func1()
/usr/local/go/src/runtime/panic.go:74 +0x7f
runtime.systemstack(0xc208016000)
/usr/local/go/src/runtime/asm_amd64.s:262 +0x7c
runtime.mstart()
/usr/local/go/src/runtime/proc1.go:656
goroutine 1368 [running]:
runtime.systemstack_switch()
/usr/local/go/src/runtime/asm_amd64.s:216 fp=0xc208b97328 sp=0xc208b97320
runtime.deferproc(0xc200000008, 0x929568)
/usr/local/go/src/runtime/panic.go:80 +0xbb fp=0xc208b97380 sp=0xc208b97328
net.(*netFD).Read(0xc20bb53f10, 0xc208c3505a, 0xfa6, 0xfa6, 0x0, 0x0, 0x0)
/usr/local/go/src/net/fd_unix.go:224 +0xde fp=0xc208b97450 sp=0xc208b97380
net.(*conn).Read(0xc208932b10, 0xc208c3505a, 0xfa6, 0xfa6, 0x0, 0x0, 0x0)
/usr/local/go/src/net/net.go:124 +0xe7 fp=0xc208b974b8 sp=0xc208b97450
bufio.(*Scanner).Scan(0xc20b525a00, 0xc208010420)
/usr/local/go/src/bufio/scan.go:180 +0x87a fp=0xc208b97678 sp=0xc208b974b8
redacted(0xc20800c5f0, 0x7f1b5fc07fe8, 0xc208932b10, 0xc208010420)
/redacted.go:99 +0x93 fp=0xc208b977c0 sp=0xc208b97678
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:1670 +0x1 fp=0xc208b977c8 sp=0xc208b977c0
created by redacted
/redacted.go:81 +0x21e
goroutine 1 [chan receive, 14 minutes]:
main.main()
/redacted.go:230 +0xe7b
goroutine 5 [chan send]:
redacted(0xc20809e000)
/redacted.go:199 +0x1f0
created by redacted.init.1
/redacted.go:184 +0x6e
[snip]
I have a process that receives data over a few hundred concurrent TCP connections and writes them to files. It's been crashing on recent versions of tip (it was stable on 1.4.1).