cmd/go: use normal code 2 for 'no such tool'

Exit code 3 is unprecedented and inconsistent with other failures here,
such as having no tool directory.

Fixes #17145

Change-Id: Ie7ed56494d4511a600214666ce3a726d63a8fd8e
Reviewed-on: https://go-review.googlesource.com/31253
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

diff --git a/src/cmd/go/tool.go b/src/cmd/go/tool.go
index b829037ec58030ca3118e81aa99119fa74f4b36d..38110cfd3fb7c016b0779ca758693c1732d6371c 100644 (file)
--- a/src/cmd/go/tool.go
+++ b/src/cmd/go/tool.go
@@ -60,7 +60,7 @@ func tool(toolName string) string {
                } else {
                        fmt.Fprintf(os.Stderr, "go tool: no such tool %q\n", toolName)
                }
-               setExitStatus(3)
+               setExitStatus(2)
                exit()
        }
        return toolPath