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cmd/go: `go build -race -n` escapes $WORK incorrectly #37012

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dfava opened this issue Feb 4, 2020 · 7 comments
Closed

cmd/go: `go build -race -n` escapes $WORK incorrectly #37012

dfava opened this issue Feb 4, 2020 · 7 comments

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@dfava
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@dfava dfava commented Feb 4, 2020

What version of Go are you using (go version)?

$ go version
go version go1.13.5 darwin/amd64

Does this issue reproduce with the latest release?

go build -race -n produces no output in the latest release.

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/danielsf/Library/Caches/go-build"
GOENV="/Users/danielsf/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/danielsf/Dropbox/edu/uio.no/favasynthesis/src/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/Cellar/go/1.13.5/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/rq/c7265gd14vlc3gzwwn9prm5h0000gn/T/go-build781677843=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

I ran go build -race -n file.go

$go build -race -n sortnp.go

runtime/race

mkdir -p $WORK/b017/
cd /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race
CGO_LDFLAGS='"-g" "-O2"' /usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/cgo -objdir $WORK/b017/ -importpath runtime/race -import_syscall=false -- -I $WORK/b017/ -g -O2 ./race.go
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
cd $WORK/b017
TERM='dumb' clang -I /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race/$WORK/b017/_x001.o -c _cgo_export.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
cd $WORK/b017
TERM='dumb' clang -I /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race/$WORK/b017/_x002.o -c race.cgo2.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
cd $WORK/b017
TERM='dumb' clang -I /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race/$WORK/b017/_cgo_main.o -c _cgo_main.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
cd /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race
TERM='dumb' clang -I . -fPIC -m64 -pthread -fmessage-length=0 -fno-common -o $WORK/b017/cgo.o $WORK/b017/_cgo_main.o $WORK/b017/_x001.o $WORK/b017/_x002.o race_darwin_amd64.syso -g -O2
TERM='dumb' /usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/cgo -dynpackage race -dynimport $WORK/b017/cgo.o -dynout $WORK/b017/_cgo_import.go
cat >$WORK/b017/importcfg << 'EOF' # internal

import config

packagefile runtime/cgo=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime/cgo.a
EOF
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/compile -o $WORK/b017/pkg.a -trimpath "$WORK/b017=>" -race -p runtime/race -std -installsuffix race -buildid Fprz1Z1KPcZIX5FOwJQI/Fprz1Z1KPcZIX5FOwJQI -goversion go1.13.5 -D "" -importcfg $WORK/b017/importcfg -pack ./doc.go $WORK/b017/_cgo_gotypes.go $WORK/b017/race.cgo1.go $WORK/b017/_cgo_import.go
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/pack r $WORK/b017/pkg.a $WORK/b017/_x001.o $WORK/b017/_x002.o ./race_darwin_amd64.syso # internal
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/buildid -w $WORK/b017/pkg.a # internal

command-line-arguments

mkdir -p $WORK/b001/
cat >$WORK/b001/importcfg << 'EOF' # internal

import config

packagefile math/rand=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/math/rand.a
packagefile sort=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/sort.a
packagefile runtime=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime.a
packagefile runtime/race=$WORK/b017/pkg.a
EOF
cd /Users/danielsf/Dropbox/edu/uio.no/favasynthesis/src/go/src
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/compile -o $WORK/b001/pkg.a -trimpath "$WORK/b001=>" -race -p main -complete -installsuffix race -buildid bFDuKt7LerJobydFWkD4/bFDuKt7LerJobydFWkD4 -goversion go1.13.5 -D _/Users/danielsf/Dropbox/edu/uio.no/favasynthesis/src/go/src -importcfg $WORK/b001/importcfg -pack ./sortnp.go
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/buildid -w $WORK/b001/pkg.a # internal
cat >$WORK/b001/importcfg.link << 'EOF' # internal
packagefile command-line-arguments=$WORK/b001/pkg.a
packagefile math/rand=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/math/rand.a
packagefile sort=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/sort.a
packagefile runtime=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime.a
packagefile runtime/race=$WORK/b017/pkg.a
packagefile math=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/math.a
packagefile sync=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/sync.a
packagefile internal/reflectlite=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/internal/reflectlite.a
packagefile internal/bytealg=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/internal/bytealg.a
packagefile internal/cpu=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/internal/cpu.a
packagefile runtime/internal/atomic=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime/internal/atomic.a
packagefile runtime/internal/math=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime/internal/math.a
packagefile runtime/internal/sys=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime/internal/sys.a
packagefile runtime/cgo=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/runtime/cgo.a
packagefile math/bits=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/math/bits.a
packagefile internal/race=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/internal/race.a
packagefile sync/atomic=/usr/local/Cellar/go/1.13.5/libexec/pkg/darwin_amd64_race/sync/atomic.a
EOF
mkdir -p $WORK/b001/exe/
cd .
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/link -o $WORK/b001/exe/a.out -importcfg $WORK/b001/importcfg.link -installsuffix race -buildmode=exe -buildid=ccVR6c_rQZXbuQvRXvvQ/bFDuKt7LerJobydFWkD4/bFDuKt7LerJobydFWkD4/ccVR6c_rQZXbuQvRXvvQ -race -extld=clang $WORK/b001/pkg.a
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/buildid -w $WORK/b001/exe/a.out # internal
mv $WORK/b001/exe/a.out sortnp

What did you expect to see? / What did you see instead?

The output from go build -race -n file.go seems slightly incorrect.
Take the following line for example. I believe the tool ought to have printed $WORK/b017/ instead of /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race/$WORK/b017/.

TERM='dumb' clang -I /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race/$WORK/b017/_x001.o -c _cgo_export.c

I'm assuming that $WORK is a full path. It could also be that $WORK is a relative path from /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race. If that's the case, then the following lines would break, since $WORK is a relative path that is now referenced from /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race instead of /usr/local/Cellar/go/1.13.5/libexec/src/runtime/race:

cd /Users/danielsf/Dropbox/edu/uio.no/favasynthesis/src/go/src
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/compile -o $WORK/b001/_pkg_.a -trimpath "$WORK/b001=>" -race -p main -complete -installsuffix race -buildid bFDuKt7LerJobydFWkD4/bFDuKt7LerJobydFWkD4 -goversion go1.13.5 -D _/Users/danielsf/Dropbox/edu/uio.no/favasynthesis/src/go/src -importcfg $WORK/b001/importcfg -pack ./sortnp.go
/usr/local/Cellar/go/1.13.5/libexec/pkg/tool/darwin_amd64/buildid -w $WORK/b001/_pkg_.a # internal
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@bcmills bcmills commented Feb 4, 2020

This may be fixed (or at least changed) by CL 210937. Please try go1.14beta1 and see if the issue still reproduces.

@bcmills bcmills changed the title cmd/build: `go build -race -n` produces incorrect paths cmd/go: `go build -race -n` escapes $WORK incorrectly Feb 4, 2020
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@bcmills bcmills commented Feb 4, 2020

Actually, I think I see a related bug in (*Builder).showOutput.

@bcmills bcmills added this to the Go1.15 milestone Feb 4, 2020
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@bcmills bcmills commented Feb 4, 2020

Didn't actually see the bug, but I do see the symptom with a build from head.
The constant $WORK likely comes from here:

b.WorkDir = "$WORK"

The funky paths are probably coming from here:

if filepath.IsAbs(f) || strings.HasPrefix(f, "$WORK") {
return f
}
return filepath.Join(dir, f)

@bcmills bcmills modified the milestones: Go1.15, Backlog Feb 4, 2020
@bcmills bcmills added the help wanted label Feb 4, 2020
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@bcmills bcmills commented Feb 4, 2020

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@GrigoriyMikhalkin GrigoriyMikhalkin commented Feb 16, 2020

Here is reason why we getting such paths:

if !filepath.IsAbs(outfile) {

We could instead use mkAbs, so it would produce paths like ./_x001.o. Just tested go build -race -n locally, it seems like this change of paths doesn't break anything:

Output

#
# runtime/race
#

mkdir -p $WORK/b031/
cd /Users/grigoriy.mihalkin/Projects/go/src/runtime/race
CGO_LDFLAGS='"-g" "-O2"' /Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/cgo -objdir $WORK/b031/ -importpath runtime/race -import_syscall=false -- -I $WORK/b031/ -g -O2 ./race.go
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
OUT:  $WORK/b031/_x001.o
cd $WORK/b031
TERM='dumb' clang -I /Users/grigoriy.mihalkin/Projects/go/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o ./_x001.o -c _cgo_export.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
OUT:  $WORK/b031/_x002.o
cd $WORK/b031
TERM='dumb' clang -I /Users/grigoriy.mihalkin/Projects/go/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o ./_x002.o -c race.cgo2.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
OUT:  $WORK/b031/_cgo_main.o
cd $WORK/b031
TERM='dumb' clang -I /Users/grigoriy.mihalkin/Projects/go/src/runtime/race -fPIC -m64 -pthread -fmessage-length=0 -fno-common -I ./ -g -O2 -o ./_cgo_main.o -c _cgo_main.c
cd $WORK
clang -fno-caret-diagnostics -c -x c - -o /dev/null || true
clang -Qunused-arguments -c -x c - -o /dev/null || true
clang -fdebug-prefix-map=a=b -c -x c - -o /dev/null || true
clang -gno-record-gcc-switches -c -x c - -o /dev/null || true
cd /Users/grigoriy.mihalkin/Projects/go/src/runtime/race
TERM='dumb' clang -I . -fPIC -m64 -pthread -fmessage-length=0 -fno-common -o $WORK/b031/_cgo_.o $WORK/b031/_cgo_main.o $WORK/b031/_x001.o $WORK/b031/_x002.o race_darwin_amd64.syso -g -O2
TERM='dumb' /Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/cgo -dynpackage race -dynimport $WORK/b031/_cgo_.o -dynout $WORK/b031/_cgo_import.go
cat >$WORK/b031/importcfg << 'EOF' # internal
# import config
packagefile runtime/cgo=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime/cgo.a
EOF
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/compile -o $WORK/b031/_pkg_.a -trimpath "$WORK/b031=>" -race -p runtime/race -std -installsuffix race -buildid j5vTSDP92B_Tnz_iZhm7/j5vTSDP92B_Tnz_iZhm7 -D "" -importcfg $WORK/b031/importcfg -pack ./doc.go $WORK/b031/_cgo_gotypes.go $WORK/b031/race.cgo1.go $WORK/b031/_cgo_import.go
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/pack r $WORK/b031/_pkg_.a $WORK/b031/_x001.o $WORK/b031/_x002.o ./race_darwin_amd64.syso # internal
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/buildid -w $WORK/b031/_pkg_.a # internal

#
# command-line-arguments
#

mkdir -p $WORK/b001/
cat >$WORK/b001/importcfg << 'EOF' # internal
# import config
packagefile fmt=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/fmt.a
packagefile runtime=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime.a
packagefile runtime/race=$WORK/b031/_pkg_.a
EOF
cd /Users/grigoriy.mihalkin/Projects/t
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/compile -o $WORK/b001/_pkg_.a -trimpath "$WORK/b001=>" -race -p main -complete -installsuffix race -buildid fGZftERV3A-zKCGGaq20/fGZftERV3A-zKCGGaq20 -D _/Users/grigoriy.mihalkin/Projects/t -importcfg $WORK/b001/importcfg -pack ./main.go
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/buildid -w $WORK/b001/_pkg_.a # internal
cat >$WORK/b001/importcfg.link << 'EOF' # internal
packagefile command-line-arguments=$WORK/b001/_pkg_.a
packagefile fmt=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/fmt.a
packagefile runtime=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime.a
packagefile runtime/race=$WORK/b031/_pkg_.a
packagefile errors=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/errors.a
packagefile internal/fmtsort=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/fmtsort.a
packagefile io=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/io.a
packagefile math=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/math.a
packagefile os=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/os.a
packagefile reflect=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/reflect.a
packagefile strconv=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/strconv.a
packagefile sync=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/sync.a
packagefile unicode/utf8=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/unicode/utf8.a
packagefile internal/bytealg=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/bytealg.a
packagefile internal/cpu=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/cpu.a
packagefile runtime/internal/atomic=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime/internal/atomic.a
packagefile runtime/internal/math=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime/internal/math.a
packagefile runtime/internal/sys=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime/internal/sys.a
packagefile runtime/cgo=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/runtime/cgo.a
packagefile internal/reflectlite=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/reflectlite.a
packagefile sort=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/sort.a
packagefile math/bits=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/math/bits.a
packagefile internal/oserror=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/oserror.a
packagefile internal/poll=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/poll.a
packagefile internal/syscall/unix=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/syscall/unix.a
packagefile internal/testlog=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/testlog.a
packagefile sync/atomic=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/sync/atomic.a
packagefile syscall=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/syscall.a
packagefile time=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/time.a
packagefile unicode=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/unicode.a
packagefile internal/race=/Users/grigoriy.mihalkin/Projects/go/pkg/darwin_amd64_race/internal/race.a
EOF
mkdir -p $WORK/b001/exe/
cd .
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/link -o $WORK/b001/exe/a.out -importcfg $WORK/b001/importcfg.link -installsuffix race -buildmode=exe -buildid=TnqlTUar2C6IrNWJY9bJ/fGZftERV3A-zKCGGaq20/fGZftERV3A-zKCGGaq20/TnqlTUar2C6IrNWJY9bJ -race -extld=clang $WORK/b001/_pkg_.a
/Users/grigoriy.mihalkin/Projects/go/pkg/tool/darwin_amd64/buildid -w $WORK/b001/exe/a.out # internal

Should i make PR?

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@bcmills bcmills commented Feb 18, 2020

@GrigoriyMikhalkin, nice find! Please do send a PR for Go 1.15.

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@gopherbot gopherbot commented Feb 18, 2020

Change https://golang.org/cl/219919 mentions this issue: cmd/go: fixed outfile path in ccompile

@gopherbot gopherbot closed this in 8992f7c Feb 26, 2020
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