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Keith Randall authored
Don't write back parts of a slicing operation if they are unchanged from the source of the slice. For example: x.s = x.s[0:5] // don't write back pointer or cap x.s = x.s[:5] // don't write back pointer or cap x.s = x.s[:5:7] // don't write back pointer There is more to be done here, for example: x.s = x.s[:len(x.s):7] // don't write back ptr or len This CL can't handle that one yet. Fixes #14855 Change-Id: Id1e1a4fa7f3076dc1a76924a7f1cd791b81909bb Reviewed-on: https://go-review.googlesource.com/20954Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Keith Randall <khr@golang.org>
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