diff options
| -rw-r--r-- | pygments/lexer.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/pygments/lexer.py b/pygments/lexer.py index 0c28cf3e..bffec0f1 100644 --- a/pygments/lexer.py +++ b/pygments/lexer.py @@ -364,7 +364,11 @@ class RegexLexerMeta(LexerMeta): assert type(tdef) is tuple, "wrong rule def %r" % tdef - rex = re.compile(tdef[0], rflags).match + try: + rex = re.compile(tdef[0], rflags).match + except Exception, err: + raise ValueError("uncompilable regex %r in state %r of %r: %s" % + (tdef[0], state, cls, err)) assert type(tdef[1]) is _TokenType or callable(tdef[1]), \ 'token type must be simple type or callable, not %r' % tdef[1] |