--- thunderbird-91.11.0/xpcom/idl-parser/xpidl/xpidl.py.python-inline-flags	2022-06-28 04:39:56.000000000 +0200

+++ thunderbird-91.11.0/xpcom/idl-parser/xpidl/xpidl.py	2022-07-11 21:55:05.287553042 +0200

@@ -1563,13 +1563,13 @@ class IDLParser(object):

     t_ignore = " \t"

     def t_multilinecomment(self, t):

-        r"/\*(?s).*?\*/"

+        r"/\*(?s:.*?)\*/"

         t.lexer.lineno += t.value.count("\n")

         if t.value.startswith("/**"):

             self._doccomments.append(t.value)

     def t_singlelinecomment(self, t):

-        r"(?m)//.*?$"

+        r"(?m://.*?$)"

     def t_IID(self, t):

         return t

@@ -1582,7 +1582,7 @@ class IDLParser(object):

         return t

     def t_LCDATA(self, t):

-        r"(?s)%\{[ ]*C\+\+[ ]*\n(?P<cdata>.*?\n?)%\}[ ]*(C\+\+)?"

+        r"(?s:%\{[ ]*C\+\+[ ]*\n(?P<cdata>.*?\n?)%\}[ ]*(C\+\+)?)"

         t.type = "CDATA"

         t.value = t.lexer.lexmatch.group("cdata")

         t.lexer.lineno += t.value.count("\n")