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cmd/go: bad error when GOROOT not set correctly #34769

rsc opened this issue Oct 8, 2019 · 0 comments


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commented Oct 8, 2019

Bad GOROOT is not diagnosed particularly well:

$ go build
$ GOROOT=/nonexist go build
go: cannot find GOROOT directory: /nonexist
$ GOROOT=/ go build
build cannot load bytes: malformed module path "bytes": missing dot in first path element

The first error is great. The second error is not. It should diagnose the bad GOROOT setting not complain about malformed module paths.

FWIW GOPATH mode is bad too but differently:

$ GOROOT=/ GO111MODULE=off go build
pw.go:16:2: cannot find package "bytes" in any of:
	/src/bytes (from $GOROOT)
	/Users/rsc/src/bytes (from $GOPATH)
../../../ cannot find package "crypto" in any of:
	/src/crypto (from $GOROOT)
	/Users/rsc/src/crypto (from $GOPATH)
pw.go:17:2: cannot find package "crypto/rand" in any of:
	/src/crypto/rand (from $GOROOT)
	/Users/rsc/src/crypto/rand (from $GOPATH)
(many lines cut)
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