cmd/go: GO15VENDOREXPERIMENT=1 breaks 'go run x.go' #11416
Description
It took me a while to figure out what's going on.
ok regexp/syntax 1.093s
--- FAIL: TestCgoCrashHandler (0.10s)
crash_test.go:85: building source: exit status 1
invalid vendoredImportPath: dir="/tmp/go-build823840384" root="." separator="/"
--- FAIL: TestCgoSignalDeadlock (0.03s)
crash_test.go:85: building source: exit status 1
invalid vendoredImportPath: dir="/tmp/go-build849881567" root="." separator="/"
--- FAIL: TestCgoTraceback (0.02s)
etc.