tree a2bc5689fb5750b93a1cad31712d941cfa572d1c
parent 41a94eb788dfcbf5bbc4a947d165ddd74538965c
author Rebecca Stambler <rstambler@golang.org> 1553648531 -0400
committer Rebecca Stambler <rstambler@golang.org> 1553649286 +0000

internal/span: switch to an offset function that doesn't panic

go/token.File.Offset panics on invalid positions, which is causing
crashes on invalid ASTs.

Change-Id: I6c698760ae92f3076a056c3560bea2e8eeb528db
Reviewed-on: https://go-review.googlesource.com/c/tools/+/169443
Reviewed-by: Ian Cottrell <iancottrell@google.com>