Fix #14790 Performance regression (hang) in 2.21dev (#8587)

Author: chrchr-github

lib/tokenlist.cpp

@@ -609,7 +609,7 @@ static bool iscpp11init_impl(const Token * const tok)
     if (Token::Match(nameToken, "]|*")) {
         const Token* tok2 = nameToken;
         if (tok2->link()) {
-            while (tok2 && tok2->link())
+            while (tok2 && precedes(tok2->link(), nameToken))
                 tok2 = tok2->link()->previous();
         }
         else

test/testtokenize.cpp

@@ -8712,6 +8712,10 @@ class TestTokenizer : public TestFixture {
                         "{ 1",
                         Token::Cpp11init::CPP11INIT);
 
+        testIsCpp11init("void f() { g([] { if (int x = 1; x) {} }); }", // #14790
+                        "{ int",
+                        Token::Cpp11init::NOINIT); // don't hang
+
         ASSERT_NO_THROW(tokenizeAndStringify("template<typename U> struct X {};\n" // don't crash
                                              "template<typename T> auto f(T t) -> X<decltype(t + 1)> {}\n"));
         ASSERT_EQUALS("[test.cpp:2:22]: (debug) auto token with no type. [autoNoType]\n", errout_str());