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Rob Findley 9afd158eb2 go/parser: parse an ast.IndexExpr for a[]
To be consistent with Go 1.16, and to preserve as much information in
the AST as possible, parse an ast.IndexExpr with BadExpr Index for the
invalid expression a[].

A go/types test had to be adjusted to account for an additional error
resulting from this change.

We don't have a lot of test coverage for parser error recovery, so
rather than write an ad-hoc test for this issue, add a new go/types test
that checks that the indexed operand is used.

Updates #46403

Change-Id: I21e6ff4179746aaa50e530d4091fded450e69824
Reviewed-on: https://go-review.googlesource.com/c/go/+/329791
Trust: Robert Findley <rfindley@google.com>
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-06-22 02:37:43 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api image: add RGBA64Image interface 2021-06-18 23:57:09 +00:00
doc cmd/go: add a -go flag to 'go mod graph' 2021-06-21 21:21:09 +00:00
lib/time lib/time, time/tzdata: update tzdata to 2021a 2021-01-25 16:08:46 +00:00
misc misc/cgo: generate Windows import libraries for clang 2021-06-13 23:53:43 +00:00
src go/parser: parse an ast.IndexExpr for a[] 2021-06-22 02:37:43 +00:00
test cmd/compile: better error message for invalid untyped operation 2021-06-16 06:05:23 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: update name 2021-06-01 17:08:12 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: update name 2021-06-01 17:08:12 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: pull gopher image from website 2021-02-16 18:25:10 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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