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Keith Randall dd7cbf3a84 cmd/compile: fix map assignment with panicking right-hand side 
Make sure that when we're assigning to a map, we evaluate the
right-hand side before we attempt to insert into the map.

We used to evaluate the left-hand side to a pointer-to-slot-in-bucket
(which as a side effect does len(m)++), then evaluate the right-hand side,
then do the assignment. That clearly isn't correct when the right-hand side
might panic.

Fixes #22881

Change-Id: I42a62870ff4bf480568c9bdbf0bb18958962bdf0
Reviewed-on: https://go-review.googlesource.com/81817
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-12-05 00:10:10 +00:00
.github doc: add a link to the code of conduct 2017-11-13 16:48:04 +00:00
api api: update next.txt 2017-11-15 21:29:55 +00:00
doc cmd/go, cmd/dist: introduce GOMIPS environment variable 2017-11-30 16:57:08 +00:00
lib/time time: vendor tzdata-2017b and update test 2017-06-07 21:23:58 +00:00
misc misc/ios: dump logs for failing lldb sessions to stdout 2017-12-04 17:48:58 +00:00
src cmd/compile: fix map assignment with panicking right-hand side 2017-12-05 00:10:10 +00:00
test cmd/compile: fix map assignment with panicking right-hand side 2017-12-05 00:10:10 +00:00
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.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
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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