Fix #12501 Crash in autoVariables() with local function declaration (#6114)

Author: chrchr-github

lib/tokenize.cpp

@@ -4824,7 +4824,7 @@ void Tokenizer::setVarIdPass1()
             }
 
             // function declaration inside executable scope? Function declaration is of form: type name "(" args ")"
-            if (scopeStack.top().isExecutable && Token::Match(tok, "%name% [,)]")) {
+            if (scopeStack.top().isExecutable && Token::Match(tok, "%name% [,)[]")) {
                 bool par = false;
                 const Token *start, *end;
 
@@ -4844,7 +4844,7 @@ void Tokenizer::setVarIdPass1()
                 }
 
                 // search end of function declaration
-                for (end = tok->next(); Token::Match(end, "%name%|*|&|,"); end = end->next()) {}
+                for (end = tok->next(); Token::Match(end, "%name%|*|&|,|[|]|%num%"); end = end->next()) {}
 
                 // there are tokens which can't appear at the begin of a function declaration such as "return"
                 const bool isNotstartKeyword = start->next() && notstart.find(start->next()->str()) != notstart.end();

test/testvarid.cpp

@@ -1497,6 +1497,22 @@ class TestVarID : public TestFixture {
             const char expected[] = "1: bool f ( X x@1 , int = 3 ) ;\n";
             ASSERT_EQUALS(expected, actual);
         }
+
+        {
+            const std::string actual = tokenize("int main() {\n"
+                                                "    int a[2];\n"
+                                                "    extern void f(int a[2]);\n"
+                                                "    f(a);\n"
+                                                "    a[0] = 0;\n"
+                                                "}\n", "test.cpp");
+            const char expected[] = "1: int main ( ) {\n"
+                                    "2: int a@1 [ 2 ] ;\n"
+                                    "3: extern void f ( int a [ 2 ] ) ;\n"
+                                    "4: f ( a@1 ) ;\n"
+                                    "5: a@1 [ 0 ] = 0 ;\n"
+                                    "6: }\n";
+            ASSERT_EQUALS(expected, actual);
+        }
     }
 
     void varid_sizeof() {