test+fix

Author: danmar

lib/checkother.cpp

@@ -3692,7 +3692,7 @@ void CheckOther::checkUnusedLabel()
 
 void CheckOther::unusedLabelError(const Token* tok, bool inSwitch, bool hasIfdef)
 {
-    if (tok && !mSettings->severity.isEnabled(inSwitch ? Severity::warning : Severity::style))
+    if (tok && !mSettings->severity.isEnabled(inSwitch ? Severity::warning : Severity::style) && !mSettings->isPremiumEnabled("unusedLabel"))
         return;
 
     std::string id = "unusedLabel";

test/cli/premium_test.py

@@ -199,3 +199,16 @@ def test_hash(tmpdir):
 
     _, _, stderr = cppcheck(args)
     assert '<error id="a-id" severity="error" msg="bug" verbose="bug" hash="123" ' in stderr
+
+
+def test_misra_unusedLabel(tmpdir):
+    """ #14467 - unusedLabel should be activated by --premium=misra-c-20xx """
+    test_file = os.path.join(tmpdir, 'test.c')
+    with open(test_file, 'wt') as f:
+        f.write('void foo() {\n'
+                'L1:\n'
+                '}\n')
+
+    exe = __copy_cppcheck_premium(tmpdir)
+    _, _, stderr = cppcheck(['--premium=misra-c-2012', 'test.c'], cppcheck_exe=exe, cwd=tmpdir)
+    assert "test.c:2:1: style: Label 'L1' is not used. [unusedLabel]" in stderr