splitfields(s, '') is illegal
diff --git a/Lib/string.py b/Lib/string.py
index 94e9157..f358ac4 100644
--- a/Lib/string.py
+++ b/Lib/string.py
@@ -63,10 +63,14 @@
# Split a list into fields separated by a given string
# NB: splitfields(s, ' ') is NOT the same as split(s)!
+# splitfields(s, '') is illegal
+splitfields_error = 'string.splitfields called with empty separator'
def splitfields(s, sep):
res = []
- ns = len(s)
nsep = len(sep)
+ if nsep == 0:
+ raise splitfields_error
+ ns = len(s)
i = j = 0
while j+nsep <= ns:
if s[j:j+nsep] == sep:
diff --git a/Lib/stringold.py b/Lib/stringold.py
index 94e9157..f358ac4 100644
--- a/Lib/stringold.py
+++ b/Lib/stringold.py
@@ -63,10 +63,14 @@
# Split a list into fields separated by a given string
# NB: splitfields(s, ' ') is NOT the same as split(s)!
+# splitfields(s, '') is illegal
+splitfields_error = 'string.splitfields called with empty separator'
def splitfields(s, sep):
res = []
- ns = len(s)
nsep = len(sep)
+ if nsep == 0:
+ raise splitfields_error
+ ns = len(s)
i = j = 0
while j+nsep <= ns:
if s[j:j+nsep] == sep: