Fixed #446 (memory leak false positive when variable is static)

src/checkmemoryleak.cpp

@@ -1654,6 +1654,13 @@ void CheckMemoryLeakInFunction::check()
             if (sz < 1)
                 sz = 1;
 
+            if (!Token::Match(tok, "[{};] %type%"))
+                continue;
+
+            // Don't check static variables
+            if (tok->next()->str() == "static")
+                continue;
+
             if (Token::Match(tok, "[{};] %type% * const| %var% [;=]"))
             {
                 const int varname_tok = (tok->tokAt(3)->str() != "const" ? 3 : 4);

test/testmemleak.cpp

@@ -131,6 +131,8 @@ private:
         TEST_CASE(simple11);
         TEST_CASE(new_nothrow);
 
+        TEST_CASE(staticvar);
+
         TEST_CASE(alloc_alloc_1);
 
         TEST_CASE(use1);
@@ -478,6 +480,21 @@ private:
         ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: p\n", errout.str());
     }
 
+
+    void staticvar()
+    {
+        check("int f()\n"
+              "{\n"
+              "    static char *s = 0;\n"
+              "    free(s);\n"
+              "    s = malloc(100);\n"
+              "    return 123;\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
+    }
+
+
+
     void alloc_alloc_1()
     {
         check("void foo()\n"