runtime: incorrect backtrace for blocked goroutine

[gpaul]

What steps will reproduce the problem?
1. go run bad_stack.go
2. netstat -na | grep pprof
3. echo -e "GET /debug/pprof/goroutine?debug=1 HTTP/1.0\n" | socat STDIO
ABSTRACT:/pprof/<pid>
4. kill -s QUIT <pid>

What is the expected output?
The pprof stack should put the foo() routine at the select{}, but puts it at the next
line instead.

What do you see instead?

// Goroutine profile contains this:
1 @ 0x41205c 0x4120c6 0x403770 0x403858 0x400cab 0x410da0
#   0x400cab    main.foo+0x5b   /home/gustav/bad_stack2.go:27

Which compiler are you using (5g, 6g, 8g, gccgo)?
6g

Which operating system are you using?
Linux 3.4.7-1.fc16.x86_64 #1 SMP Mon Jul 30 16:37:23 UTC 2012 x86_64 x86_64 x86_64
GNU/Linux

Which version are you using?  (run 'go version')
edge

Please provide any additional information below.

Attachments:

1. bad_stack2.go (716 bytes)

[rsc]

Comment 1:

I tried to reproduce this on my Mac and could not. I have not tried on Linux yet.

Labels changed: added priority-later, go1.1, removed priority-triage.

Status changed to Accepted.

[rsc]

Comment 2:

Labels changed: added size-m.

[rsc]

Comment 3:

Labels changed: added suggested.

[rsc]

Comment 4:

This issue was closed by revision 318309a.

Status changed to Fixed.