Fix #14966 internalError for valid typedef (#8783)

Author: chrchr-github

lib/tokenize.cpp

@@ -566,11 +566,18 @@ namespace {
             const auto checkForRecursion = [this]() {
                 if (Token::Match(mTypedefToken, "typedef %name% %name% ;"))
                     return;
+                int nBraces = 0;
                 for (const Token *tok = mTypedefToken; tok != mEndToken; tok = tok->next()) {
+                    if (tok->str() == "{")
+                        ++nBraces;
+                    else if (tok->str() == "}")
+                        --nBraces;
                     if (tok == mNameToken)
                         continue;
                     if (tok->str() != mNameToken->str())
                         continue;
+                    if (nBraces > 0 && Token::simpleMatch(tok->next(), ";"))
+                        continue;
                     if (Token::Match(tok->previous(), "struct|class|enum|union"))
                         continue;
                     throw InternalError(tok, "recursive typedef encountered");

test/testsimplifytypedef.cpp

@@ -3879,6 +3879,9 @@ class TestSimplifyTypedef : public TestFixture {
     void simplifyTypedef164() {
         const char code[] = "typedef struct D{x;}y y;";
         ASSERT_THROW_INTERNAL(tok(code), INTERNAL);
+
+        const char code2[] = "typedef struct { int t; } t;"; // #14966
+        ASSERT_EQUALS("struct t { int t ; } ;", tok(code2));
     }
 
     void simplifyTypedefFunction1() {