Description
What version of Go are you using (go version)?
go version go1.10.1 linux/amd64
Does this issue reproduce with the latest release?
Yes (on go1.10.1).
But previous go1.10 works without the issue.
What operating system and processor architecture are you using (go env)?
It is (an ancient) CentOS 5 VM:
$ uname -a
Linux localhost.localdomain 2.6.18-398.el5 #1 SMP Tue Sep 16 20:50:52 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
From go env (~90% runs crashed with no stdout output, longest output below):
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/username/.cache/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
What did you do?
I run go version/go env (on the Centos5 VM) or go build hello_world.go (on the Centos5 VM or on some real machine running Centos5). Where hello_world.go comes from https://golang.org/ (almost, I used English word "world").
What did you expect to see?
I expect no crash and proper output of go version / go env and successful compilation with go build.
Or (may be) a note in release notes if such old kernel is not supported but even than I would not expect it to change in a point release (from 1.10 to 1.10.1).
Actually for go1.10 I see what was expected (on both the Centos 5 VM and the real machine running Centos 5).
What did you see instead?
On the real CentOS 5 machine go version works fine but go build has similar issue as described below.
On the CentOS 5 VM:
go version, 1 of 5 runs displays expected output but almost always crashes as below (with or without proper output).go env, ~90% runs crashes with no output, ~10% display some output and crashes (similar to below).go buildcrashes (similar to below).
Example crash of go version:
$ go version
runtime: epollwait on fd 4 failed with 38
fatal error: runtime: netpoll failed
runtime stack:
runtime.throw(0x8b4145, 0x17)
/usr/local/go/src/runtime/panic.go:616 +0x81
runtime.netpoll(0x76ecc806f00, 0x2b2300000000)
/usr/local/go/src/runtime/netpoll_epoll.go:75 +0x216
runtime.sysmon()
/usr/local/go/src/runtime/proc.go:4265 +0x424
runtime.mstart1(0x0)
/usr/local/go/src/runtime/proc.go:1227 +0xe7
runtime.mstart()
/usr/local/go/src/runtime/proc.go:1193 +0x76
goroutine 1 [chan receive, locked to thread]:
text/template/parse.(*lexer).nextItem(...)
/usr/local/go/src/text/template/parse/lex.go:195
text/template/parse.(*Tree).peek(...)
/usr/local/go/src/text/template/parse/parse.go:95
text/template/parse.(*Tree).parse(0xc4200b6100)
/usr/local/go/src/text/template/parse/parse.go:280 +0xb8f
text/template/parse.(*Tree).Parse(0xc4200b6100, 0x8c94da, 0x8f3, 0x0, 0x0, 0x0, 0x0, 0xc420198510, 0xc420051f00, 0x2, ...)
/usr/local/go/src/text/template/parse/parse.go:233 +0x226
text/template/parse.Parse(0x8aa77d, 0x4, 0x8c94da, 0x8f3, 0x0, 0x0, 0x0, 0x0, 0xc420051f00, 0x2, ...)
/usr/local/go/src/text/template/parse/parse.go:55 +0x108
text/template.(*Template).Parse(0xc420171940, 0x8c94da, 0x8f3, 0xc420051ef0, 0x1fad, 0x8a9d7a)
/usr/local/go/src/text/template/template.go:198 +0x118
goroutine 5 [runnable]:
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go:20
created by os/signal.init.0
/usr/local/go/src/os/signal/signal_unix.go:28 +0x41
goroutine 6 [runnable]:
text/template/parse.(*lexer).run(0xc4201adc70)
/usr/local/go/src/text/template/parse/lex.go:226
created by text/template/parse.lex
/usr/local/go/src/text/template/parse/lex.go:221 +0x15f