tree 0343b376bfd51ba7a3dbb645ed40c53c6e620edb
parent 383b2e75a7a4198c42f8f87833eefb772868a56f
author Rich Hong <hong.rich@gmail.com> 1601325158 -0400
committer Alberto Donizetti <alb.donizetti@gmail.com> 1631633908 +0000

internal/language: fix canonicalization of extlang

parseTag tries to replace <lang>-<extlang> with <extlang>, but <extlang>
itself can also be replaced with its canonical form which can be a
different length than the original <extlang>. The existing
implementation assumes that the length of <extlang> is 3 and would leave
scanner positions in an incorrect state if the length of <extlang> is
not 3.

Fixes golang/go#41617

Change-Id: Ie0da320530e2545f9b521e7b8cf503d854c50b45
Reviewed-on: https://go-review.googlesource.com/c/text/+/260177
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
Trust: Cherry Mui <cherryyz@google.com>
Trust: Marcel van Lohuizen <mpvl@golang.org>
Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>