Fixed #8184 (Syntax error: case outside switch)

lib/tokenize.cpp

@@ -8207,6 +8207,16 @@ const Token * Tokenizer::findGarbageCode() const
         }
     }
 
+    // case keyword must be inside switch
+    for (const Token *tok = tokens(); tok; tok = tok->next()) {
+        if (Token::simpleMatch(tok, "switch (") && Token::simpleMatch(tok->linkAt(1), ") {"))
+            tok = tok->linkAt(1)->linkAt(1);
+        else if (tok->str() == "(")
+            tok = tok->link();
+        else if (tok->str() == "case")
+            return tok;
+    }
+
     for (const Token *tok = tokens(); tok ; tok = tok->next()) {
         if (!Token::simpleMatch(tok, "for (")) // find for loops
             continue;

test/testgarbage.cpp

@@ -224,6 +224,7 @@ private:
         TEST_CASE(templateSimplifierCrashes);
         TEST_CASE(syntaxErrorFirstToken); // Make sure syntax errors are detected and reported
         TEST_CASE(syntaxErrorLastToken); // Make sure syntax errors are detected and reported
+        TEST_CASE(syntaxErrorCase);
         TEST_CASE(enumTrailingComma);
     }
 
@@ -1482,6 +1483,11 @@ private:
         // ASSERT_THROW(  , InternalError)
     }
 
+    void syntaxErrorCase() {
+        // case must be inside switch block
+        ASSERT_THROW(checkCode("void f() { switch (a) {}; case 1: }"), InternalError);
+    }
+
     void enumTrailingComma() {
         ASSERT_THROW(checkCode("enum ssl_shutdown_t {ssl_shutdown_none = 0,ssl_shutdown_close_notify = , } ;"), InternalError); // #8079
     }