Issue #28950: Disallow -j0 combined with -T/-l in regrtest.
diff --git a/Lib/test/libregrtest/cmdline.py b/Lib/test/libregrtest/cmdline.py
index 891b00c..d621f5f 100644
--- a/Lib/test/libregrtest/cmdline.py
+++ b/Lib/test/libregrtest/cmdline.py
@@ -301,9 +301,9 @@
if ns.single and ns.fromfile:
parser.error("-s and -f don't go together!")
- if ns.use_mp and ns.trace:
+ if ns.use_mp is not None and ns.trace:
parser.error("-T and -j don't go together!")
- if ns.use_mp and ns.findleaks:
+ if ns.use_mp is not None and ns.findleaks:
parser.error("-l and -j don't go together!")
if ns.failfast and not (ns.verbose or ns.verbose3):
parser.error("-G/--failfast needs either -v or -W")