pkg/osutil: return output with errors from Run

Turns out git bisect fails to communicate some outcomes (multiple potential commits),
and the only way to understand what happened is parsing plain English output.
Extracting the output from the error is quite unhandy.
So return it with the error.

Update #501

1 files changed, 1 insertions, 1 deletions

diff --git a/pkg/osutil/osutil.go b/pkg/osutil/osutil.go
index d8a1cbe84..7061b02d5 100644
--- a/pkg/osutil/osutil.go
+++ b/pkg/osutil/osutil.go
@@ -59,7 +59,7 @@ func Run(timeout time.Duration, cmd *exec.Cmd) ([]byte, error) {
 		if <-timedout {
 			text = fmt.Sprintf("timedout %q", cmd.Args)
 		}
-		return nil, &VerboseError{
+		return output.Bytes(), &VerboseError{
 			Title:  text,
 			Output: output.Bytes(),
 		}