commit cb0de68a089fd2b05bcf87c4f487b30b96392b5e
author Kyle Lemons <kyle@kylelemons.net> Mon Feb 06 14:10:03 2012 +1100
committer Rob Pike <r@golang.org> Mon Feb 06 14:10:03 2012 +1100
tree 531a90da9203c804d6f9115b00de9990b59af7f4
parent 5be24046c7b40d0ed522cba8d38c45e406269b28

            cmd/go: build: print import errors when invoked on files

      This fix makes the goFilesPackage helper function print the errors from
      package imports and exit similar to how the packagesForBuild function does.

      Without this change, when invoking "go build *.go" with, for example,
      an old import path, the following stack trace is generated:

      panic: runtime error: invalid memory address or nil pointer dereference

      goroutine 1 [running]:
      go/build.(*Tree).PkgDir(...)
              /opt/go/src/pkg/go/build/path.go:52 +0xfb
      main.(*builder).action(...)
              /opt/go/src/cmd/go/build.go:327 +0xb8
      main.(*builder).action(...)
              /opt/go/src/cmd/go/build.go:335 +0x208
      main.runBuild(...)
              /opt/go/src/cmd/go/build.go:129 +0x386
      main.main()
              /opt/go/src/cmd/go/main.go:126 +0x2d8

Fixes #2865.

R=rsc, dvyukov, r
CC=golang-dev
https://golang.org/cl/5624052