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Jay Conrod 10156b6783 cmd/go: avoid link errors when -coverpkg covers main packages 
The -coverpkg lets users specify a list of packages that should have
coverage instrumentation. This may include packages not transitively
imported by tests. For each tested package, the synthetic main package
imports all covered packages so they can be registered with
testing.RegisterCover. This makes it possible for a main package to
import another main package.

When we compile a package with p.Internal.BuildInfo set (set on main
packages by Package.load in module mode), we set
runtime/debug.modinfo. Multiple main packages may be passed to the
linker because of the above scenario, so this causes duplicate symbol
errors.

This change copies p.Internal.BuildInfo to the synthetic main package
instead of the internal test package. Additionally, it forces main
packages imported by the synthetic test main package to be recompiled
for testing. Recompiled packages won't have p.Internal.BuildInfo set.

Fixes #30374

Change-Id: I06f028d55905039907940ec89d2835f5a1040203
Reviewed-on: https://go-review.googlesource.com/c/go/+/164877
Run-TryBot: Jay Conrod <jayconrod@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2019-03-08 15:34:40 +00:00
.github .github: don't render author-facing text in ISSUE_TEMPLATE 2018-11-02 04:47:34 +00:00
api text/scanner: don't liberally consume (invalid) floats or underbars 2019-02-20 20:23:28 +00:00
doc doc: add missing paragraph break in Effective Go 2019-03-07 04:46:03 +00:00
lib/time time: read 64-bit data if available 2019-02-26 23:10:35 +00:00
misc misc: fix typos in various docs 2019-03-07 07:30:06 +00:00
src cmd/go: avoid link errors when -coverpkg covers main packages 2019-03-08 15:34:40 +00:00
test cmd/compile: change the condition flags of floating-point comparisons in arm64 backend 2019-03-07 21:23:52 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: change email address for Elias Naur 2019-01-23 15:05:26 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS CONTRIBUTORS: second round of updates for Go 1.12 2019-01-30 18:01:19 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE
PATENTS
README.md README: linkify some paths 2018-06-06 18:07:01 +00:00
robots.txt

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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