Issue #17825: Cursor ^ is correctly positioned for SyntaxError and IndentationError.
diff --git a/Lib/traceback.py b/Lib/traceback.py
index b13bfe2..f33fced 100644
--- a/Lib/traceback.py
+++ b/Lib/traceback.py
@@ -227,11 +227,12 @@
if badline is not None:
lines.append(' %s\n' % badline.strip())
if offset is not None:
- caretspace = badline.rstrip('\n')[:offset].lstrip()
+ caretspace = badline.rstrip('\n')
+ offset = min(len(caretspace), offset) - 1
+ caretspace = caretspace[:offset].lstrip()
# non-space whitespace (likes tabs) must be kept for alignment
caretspace = ((c.isspace() and c or ' ') for c in caretspace)
- # only three spaces to account for offset1 == pos 0
- lines.append(' %s^\n' % ''.join(caretspace))
+ lines.append(' %s^\n' % ''.join(caretspace))
msg = value.msg or "<no detail available>"
lines.append("%s: %s\n" % (stype, msg))
return lines