am fb74a21f: am f885d876: Merge change I2bdc7ec9 into eclair

Merge commit 'fb74a21f4792e08c1ebee5d0347698885e31d805'

* commit 'fb74a21f4792e08c1ebee5d0347698885e31d805':
  Speed up warn.py about 30x by precompiling all the regular expressions.