container/stub: remove function call in handleExit

This gets inlined and does not cause problems usually but turns out -coverpkg uninlines it and breaks the recovery.

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/dispatcher_test.go

@@ -149,7 +149,7 @@ func checkSimple(t *testing.T, fname string, testCases []simpleTestCase) {
 			t.Helper()
 
 			k := &kstub{stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{s} }, tc.want)}
-			defer k.HandleExit()
+			defer stub.HandleExit(t)
 			if err := tc.f(k); !reflect.DeepEqual(err, tc.wantErr) {
 				t.Errorf("%s: error = %v, want %v", fname, err, tc.wantErr)
 			}
@@ -189,7 +189,7 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
 					func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{s} },
 					stub.Expect{Calls: slices.Concat(tc.early, []stub.Call{{Name: stub.CallSeparator}}, tc.apply)},
 				)}
-				defer k.HandleExit()
+				defer stub.HandleExit(t)
 				errEarly := tc.op.early(state, k)
 				k.Expects(stub.CallSeparator)
 				if !reflect.DeepEqual(errEarly, tc.wantErrEarly) {