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-rw-r--r--pygments/lexer.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/pygments/lexer.py b/pygments/lexer.py
index 2648b07b..ab7fdf2f 100644
--- a/pygments/lexer.py
+++ b/pygments/lexer.py
@@ -627,6 +627,8 @@ def do_insertions(insertions, tokens):
# leftover tokens
if insleft:
+ # no normal tokens, set realpos to zero
+ realpos = realpos or 0
for p, t, v in itokens:
yield realpos, t, v
realpos += len(v)