import/path: go build -trimpath no trim in root path

[ddatsh]

Go version

go version go1.23.1 windows/amd64

Output of go env in your module/workspace:

set GO111MODULE=auto
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\admin\AppData\Local\go-build
set GOENV=C:\Users\admin\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\admin\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\admin\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Users\admin\.g\go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=C:\Users\admin\.g\go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.23.1
set GODEBUG=
set GOTELEMETRY=local
set GOTELEMETRYDIR=C:\Users\admin\AppData\Roaming\go\telemetry
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=
set GOWORK=
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=Z:\TEMP\go-build3577254774=/tmp/go-build -gno-record-gcc-switches

What did you do?

package main

func f(x int) int {
	return 1 / x
}
func main() {
	f(0)
}

xx.go in root path like z:/
go build -trimpath xx.go

What did you see happen?

panic: runtime error: integer divide by zero

goroutine 1 [running]:
main.f(...)
        z:/xx.go:4
main.main()
        z:/xx.go:7 +0xa

What did you expect to see?

panic: runtime error: integer divide by zero

goroutine 1 [running]:
main.f(...)
        ./xx.go:4
main.main()
       ./xx.go:7 +0xa

[gabyhelp]

Related Issues and Documentation

• go/build: Default.Import fails for standard-library packages when built with -trimpath #51483 (closed)
• error gopath #66295 (closed)
• cmd/go: build_trimpath test doesn't correctly test executable reproducibility #35435 (closed)
• ”go build -race ./...“ Causing the program to not run correctly #63720 (closed)
• cmd/go: Unexpected behavior when building from a parent directory of a module #34300 (closed)
• cmd/go: -trimpath option fails if it contains whitespace #33223 (closed)
• cmd/build: -trimpath is ignored when forcefully passing -gcflags=-trimpath=$SOMETHING #66849 (closed)
• cmd/go: update -trimpath documentation #50402 (closed)
• cmd/go: TestScript/build_trimpath broken with gccgo 10.2.1 as of CL 266365 #43974 (closed)
• cmd/go: trimpath gcflag not trimming anything #30696 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[seankhliao]

you need to be in a module for trimpath to make sense.