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Joe Tsai af37332d16 io: fix Pipe regression with differing error types
Usage of atomic.Value has a subtle requirement that the
value be of the same concrete type. In prior usage, the intention
was to consistently store a value of the error type.
Since error is an interface, the underlying concrete can differ.

Fix this by creating a type-safe abstraction over atomic.Value
that wraps errors in a struct{error} type to ensure consistent types.

Change-Id: Ica74f2daba15e4cff48d2b4f830d2cb51c608fb6
Reviewed-on: https://go-review.googlesource.com/75594
Run-TryBot: Joe Tsai <thebrokentoaster@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2017-11-02 23:05:53 +00:00
.github .github: update ISSUE_TEMPLATE to be closer to 'go bug' 2017-08-19 04:06:10 +00:00
api api: update next.txt 2017-10-28 00:00:56 +00:00
doc spec: match syntax for method expressions with implementations 2017-10-25 22:49:03 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc go/printer: forbid empty line before first comment in block 2017-11-02 18:17:22 +00:00
src io: fix Pipe regression with differing error types 2017-11-02 23:05:53 +00:00
test cmd/compile: specialize map creation for small hint sizes 2017-11-02 17:03:45 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
CONTRIBUTING.md .github: recommend 'go bug' when filing an issue 2017-07-24 17:18:34 +00:00
CONTRIBUTORS A+C: final updates for Go 1.9 2017-07-18 01:47:54 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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