Uninitialized variables: better handling of 'a[b[..]]' when b is not initialized

lib/checkother.cpp

@@ -1992,9 +1992,9 @@ private:
                 return &tok;
             }
 
-            if (Token::Match(tok.previous(), "[;{}] %var% ="))
+            if (Token::Match(tok.previous(), "[;{}] %var% =|["))
             {
-                // using same variable rhs?
+                // check variable usages in rhs/index
                 for (const Token *tok2 = tok.tokAt(2); tok2; tok2 = tok2->next())
                 {
                     if (Token::Match(tok2, ";|)|="))

test/testother.cpp

@@ -1603,6 +1603,13 @@ private:
     // arrays..
     void uninitvar_arrays()
     {
+        checkUninitVar("int f()\n"
+                       "{\n"
+                       "    char a[10];\n"
+                       "    a[a[0]] = 0;\n"
+                       "}\n");
+        ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: a\n", errout.str());
+
         checkUninitVar("int f()\n"
                        "{\n"
                        "    char a[10];\n"