Make --show-traceback the default and add --no-show-traceback

mcepl · mcepl · commit e05d4784707a · 2026-04-28T22:04:05.000+02:00
Fixes: #21360 Signed-off-by: Matěj Cepl <mcepl@cepl.eu>
diff --git a/mypy/main.py b/mypy/main.py
@@ -1118,8 +1118,11 @@ def add_invertible_flag(
         title="Advanced options", description="Debug and customize mypy internals."
     )
     internals_group.add_argument("--pdb", action="store_true", help="Invoke pdb on fatal error")
-    internals_group.add_argument(
-        "--show-traceback", "--tb", action="store_true", help="Show traceback on fatal error"
+    add_invertible_flag(
+        "--show-traceback",
+        default=True,
+        help="Show traceback on fatal error",
+        group=internals_group,
     )
     internals_group.add_argument(
         "--raise-exceptions", action="store_true", help="Raise exception on fatal error"

Original file line number	Diff line number	Diff line change
`@@ -1118,8 +1118,11 @@ def add_invertible_flag(`
`1118`	`1118`	`title="Advanced options", description="Debug and customize mypy internals."`
`1119`	`1119`	`)`
`1120`	`1120`	`internals_group.add_argument("--pdb", action="store_true", help="Invoke pdb on fatal error")`
`1121`		`- internals_group.add_argument(`
`1122`		`- "--show-traceback", "--tb", action="store_true", help="Show traceback on fatal error"`
	`1121`	`+ add_invertible_flag(`
	`1122`	`+ "--show-traceback",`
	`1123`	`+ default=True,`
	`1124`	`+ help="Show traceback on fatal error",`
	`1125`	`+ group=internals_group,`
`1123`	`1126`	`)`
`1124`	`1127`	`internals_group.add_argument(`
`1125`	`1128`	`"--raise-exceptions", action="store_true", help="Raise exception on fatal error"`