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Bryan C. Mills 2ed6a54a39 cmd/go: retain extra roots to disambiguate imports in 'go mod tidy'
We don't normally keep explicit requirements for test dependencies of
packages loaded from other modules when the required version is
already the selected version in the module graph. However, in some
cases we may need to keep an explicit requirement in order to make use
of lazy module loading to disambiguate an otherwise-ambiguous import.

Note that there is no Go version guard for this change: in the cases
where the behavior of 'go mod tidy' has changed, previous versions of
Go would produce go.mod files that break successive calls to
'go mod tidy'. Given that, I suspect that any existing user in the
wild affected by this bug either already has a workaround in place
using redundant import statements (in which case the change does not
affect them) or is running 'go mod tidy -e' to force past the error
(in which case a change in behavior to a non-error should not be
surprising).

Fixes #60313.

Change-Id: Idf294f72cbe3904b871290d79e4493595a0c7bfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/496635
Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-05-22 21:07:10 +00:00
.github doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
api cmp: new package 2023-05-19 17:41:52 +00:00
doc doc: add slog to release notes 2023-05-22 00:43:01 +00:00
lib/time lib/time: update to 2023c/2023c 2023-05-03 20:14:11 +00:00
misc wasm: remove redundant calls to setTimeout and clearTimeout 2023-05-22 17:47:47 +00:00
src cmd/go: retain extra roots to disambiguate imports in 'go mod tidy' 2023-05-22 21:07:10 +00:00
test cmd/compile: constant-fold loads from constant dictionaries and types 2023-05-19 18:10:11 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore cmd/dist: refactor generated cgo-support logic 2023-04-20 17:26:46 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: introduce GOROOT/go.env and move proxy/sumdb config there 2023-01-17 23:10:39 +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: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

The Go Programming Language

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