Uninitialized variables: Fixed false positive when there is assignment in condition

lib/checkuninitvar.cpp

@@ -33,6 +33,16 @@ namespace {
 
 //---------------------------------------------------------------------------
 
+
+// Skip [ .. ]
+static const Token * skipBrackets(const Token *tok)
+{
+    while (tok && tok->str() == "[")
+        tok = tok->link()->next();
+    return tok;
+}
+
+
 /// @addtogroup Checks
 /// @{
 
@@ -860,7 +870,7 @@ private:
         if (tok.varId() && Token::Match(&tok, "%var% <|<=|==|!=|)"))
             use(checks, &tok);
 
-        else if (Token::Match(&tok, "!| %var% ["))
+        else if (Token::Match(&tok, "!| %var% [") && !Token::simpleMatch(skipBrackets(tok.next()), "="))
             use_array_or_pointer_data(checks, tok.str() == "!" ? tok.next() : &tok);
 
         else if (Token::Match(&tok, "!| %var% (")) {

test/testuninitvar.cpp

@@ -688,6 +688,12 @@ private:
                        "}\n");
         ASSERT_EQUALS("", errout.str());
 
+        checkUninitVar("void f() {\n"
+                       "   char a[10];\n"
+                       "   if (a[0] = x){}\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
+
         checkUninitVar("int foo(int x)\n"
                        "{\n"
                        "    int i;\n"