Fixed issue #4890: Handle empty text search pattern in
Tkinter.Text.search
diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index 8a9d8a4..fded249 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -3032,7 +3032,8 @@
forwards=None, backwards=None, exact=None,
regexp=None, nocase=None, count=None, elide=None):
"""Search PATTERN beginning from INDEX until STOPINDEX.
- Return the index of the first character of a match or an empty string."""
+ Return the index of the first character of a match or an
+ empty string."""
args = [self._w, 'search']
if forwards: args.append('-forwards')
if backwards: args.append('-backwards')
@@ -3041,7 +3042,7 @@
if nocase: args.append('-nocase')
if elide: args.append('-elide')
if count: args.append('-count'); args.append(count)
- if pattern[0] == '-': args.append('--')
+ if pattern and pattern[0] == '-': args.append('--')
args.append(pattern)
args.append(index)
if stopindex: args.append(stopindex)