Issue #29392: Prevent crash when passing invalid arguments into msvcrt module.

1 files changed, 6 insertions, 2 deletions

diff --git a/Lib/locale.py b/Lib/locale.py
index 6d59cd8bab..4de0090ed9 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -302,12 +302,16 @@ def str(val):
 
 def delocalize(string):
     "Parses a string as a normalized number according to the locale settings."
+
+    conv = localeconv()
+
     #First, get rid of the grouping
-    ts = localeconv()['thousands_sep']
+    ts = conv['thousands_sep']
     if ts:
         string = string.replace(ts, '')
+
     #next, replace the decimal point with a dot
-    dd = localeconv()['decimal_point']
+    dd = conv['decimal_point']
     if dd:
         string = string.replace(dd, '.')
     return string