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Fatih Arslan bc6db94186 go/ast/astutil: do not merge if import path is last line
DeleteNamedImport assumes the import declaration is in the form of:

    import (
      "foo"
    )

If an import path is deleted there might be a blank line-sized hole:

    import (

    )

It'll merge the black hole with the last line to change it to:

    import (
    )

However the import declaration might be in the following form as well:

    import (
      "foo")

Whic means after deleting the import path, it changes to:

    import (
    )

In this case it still tries to merge the line with a non existing line,
causing token.File.MergeLine to panic.

We fix the issue by checking that the import path line is not the last
line to avoid panicing.

Fixes golang/go#20229

Change-Id: I37537a4eaa83d14db59a2926d7bb14c27167a2e4
Reviewed-on: https://go-review.googlesource.com/44372
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-05-29 01:35:25 +00:00
benchmark/parse benchmark/parse: fix cosmetic defect in error str. 2015-02-02 17:07:43 +00:00
blog blog/atom: support atom:link as in RFC4287 4.2.7 2017-02-04 21:42:09 +00:00
cmd cmd/toolstash: use "go env GOROOT" instead of runtime.GOROOT() 2017-05-09 20:09:15 +00:00
container/intsets Revert "x/tools/container/intsets: remove unused function" 2017-03-01 14:51:44 +00:00
cover cover: fixed broken error message 2016-03-08 18:20:19 +00:00
go go/ast/astutil: do not merge if import path is last line 2017-05-29 01:35:25 +00:00
godoc Revert "godoc: use "IsPredeclared" of go/doc" 2017-05-15 17:14:06 +00:00
imports imports: wait for fastWalk workers to finish before returning (take 2) 2017-04-25 17:30:35 +00:00
playground playground/socket: deflake test, remove sleep 2016-12-11 02:33:14 +00:00
present present: fix misspelled log message 2017-05-08 18:52:03 +00:00
refactor refactor/rename: add line number to ambiguityError 2017-05-10 14:27:37 +00:00
third_party cmd/heapview: dowgrade to customelements v0 2016-08-05 20:49:36 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore dashboard: rearrange tree, in prep for packagification 2015-01-15 02:58:11 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
CONTRIBUTING.md doc: add CONTRIBUTING.md 2015-02-18 23:43:38 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README x/tools: s/oracle/guru/g in various comments 2016-10-13 18:54:04 +00:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00

README

This subrepository holds the source for various packages and tools that support
the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.
Others, including the Go guru and the test coverage tool, can be fetched with "go get".

Packages include a type-checker for Go and an implementation of the
Static Single Assignment form (SSA) representation for Go programs.

To submit changes to this repository, see http://golang.org/doc/contribute.html.