Set the env variable to only include the correct gopath in the test.
Fixesgolang/go#20805
Change-Id: I496ed5c60278e508016f915cf53a115cc3c222ae
Reviewed-on: https://go-review.googlesource.com/47410
Reviewed-by: Alan Donovan <adonovan@google.com>
Previous implementation will overwrite files the import "C" with the
cgo preprocessing and renaming. Rename will now emit an error when
rename must edit files that import "C". Will also emit more useful
error when using -offset in a "C" importing file.
Fixesgolang/go#17839
Change-Id: I072100b22197ec145b56d727feca58be7529e359
Reviewed-on: https://go-review.googlesource.com/45930
Reviewed-by: Alan Donovan <adonovan@google.com>