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									 Matt Layher | 1ae7c7b29e | singleflight: copy from internal/singleflight in standard library Updates golang/go#17338
Change-Id: Icf1972cdec0bbc9b3142141d9e706c07f312efc0
Reviewed-on: https://go-review.googlesource.com/30292
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org> | 2016-10-04 23:36:20 +00:00 |  |