Fix the new FnmatchMatcher for >100 patterns

2 files changed, 2 insertions, 1 deletions

diff --git a/coverage/files.py b/coverage/files.py
index 08ce1e84..80b69572 100644
--- a/coverage/files.py
+++ b/coverage/files.py
@@ -188,6 +188,7 @@ class FnmatchMatcher(object):
 
     def match(self, fpath):
         """Does `fpath` match one of our filename patterns?"""
+        #print("Matching %r against %r" % (self.re.pattern, fpath))
         return self.re.match(fpath) is not None
 
 
diff --git a/coverage/misc.py b/coverage/misc.py
index c88d4ecd..4b1dccb2 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -87,7 +87,7 @@ def bool_or_none(b):
 def join_regex(regexes):
     """Combine a list of regexes into one that matches any of them."""
     if len(regexes) > 1:
-        return "|".join("(%s)" % r for r in regexes)
+        return "|".join("(?:%s)" % r for r in regexes)
     elif regexes:
         return regexes[0]
     else: