runtime: TestSmhasherAvalanche fails intermittently

[donaldgraham]

What does 'go version' print?
go version devel +2b8ee33fbca8 Tue May 06 11:40:43 2014 +1000 linux/amd64

What steps reproduce the problem?
Set GOMAXPROCS to 4.
Run the attached script from src/pkg/runtime.  The script simply runs
TestSmhasherAvalanche repeatedly until it fails.  Mine fails after about an hour.

What happened?
--- FAIL: TestSmhasherAvalanche (39.94 seconds)
    hash_test.go:412: bad bias for bytes2 bit 7 -> bit 8: 48487/100000

What should have happened instead?
=== RUN TestSmhasherAvalanche
--- PASS: TestSmhasherAvalanche (39.34 seconds)

Please provide any additional information below.

Attachments:

1. TestSmhasherAvalanche.sh (113 bytes)

[donaldgraham]

Comment 1:

I've run my script a few more times, and I've observed that it can take up to 4 hours
for the test to fail.

[ianlancetaylor]

Comment 2:

Labels changed: added repo-main, release-go1.3maybe.

Owner changed to @randall77.

[gopherbot]

Comment 3:

CL https://golang.org/cl/98170043 mentions this issue.

[randall77]

Comment 4:

This issue was closed by revision 711d1ad.

Status changed to Fixed.