tree f95aab838a9c08f9ea6f4836ef7828402525ed3f
parent 7c8a9615c0512815060489a491265c275127b79f
author hagen1778 <hagen1778@gmail.com> 1505842091 +0300
committer Joe Tsai <thebrokentoaster@gmail.com> 1505853324 +0000

log: fix data race on log.Output

There was unprotected access to Logger.flag in log.Output which
could lead to data race in cases when log.SetFlags called simultaneously.
For example, "hot" switching on/off debug-mode for Logger by log.SetFlags
while application still writing logs.

Fixes #21935

Change-Id: I36be25f23cad44cde62ed1af28a30d276400e1b8
Reviewed-on: https://go-review.googlesource.com/64710
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>