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9cf2a6a77f
Some Go version managers like github.com/voidint/g use GOROOT symlinks,
which silently broke the way we patch the linker via go build -overlay.
Reproduced the original crash via the following testscript:
env GARBLE_CACHE=${WORK}/garble-cache
symlink goroot -> /usr/lib/go
env GOROOT=${WORK}/goroot
exec garble run main.go
-- main.go --
package main
import "fmt"
func main() {
fmt.Println("hello world")
}
We don't commit this testscript given how it's an expensive test
and for a relatively rare edge case whose fix is now well documented.
Moreover, as GOTOOLCHAIN is now available, I expect version managers
for Go to fade away with time.
While here, remove a debugging 'exec cat' from a testscript.
Fixes #915.