Fix #13637 Stack overflow in findShadowed() (danmar#7306)

Author: chrchr-github

lib/symboldatabase.cpp

@@ -3396,8 +3396,11 @@ void SymbolDatabase::addClassFunction(Scope *&scope, const Token *&tok, const To
                         const Token *closeParen = tok->linkAt(1);
                         if (closeParen) {
                             const Token *eq = TokenList::isFunctionHead(closeParen, ";");
-                            if (eq && Token::simpleMatch(eq->tokAt(-2), "= default ;")) {
-                                func->isDefault(true);
+                            if (eq && Token::Match(eq->tokAt(-2), "= default|delete ;")) {
+                                if (eq->strAt(-1) == "default")
+                                    func->isDefault(true);
+                                else
+                                    func->isDelete(true);
                                 return;
                             }
                             if (func->type == Function::eDestructor && destructor) {

test/testsymboldatabase.cpp

@@ -5727,6 +5727,24 @@ class TestSymbolDatabase : public TestFixture {
             ASSERT(it->isDefault());
             ASSERT_EQUALS(it->type, Function::Type::eDestructor);
         }
+        {
+            GET_SYMBOL_DB("struct S {\n" // #13637
+                          "    ~S();\n"
+                          "};\n"
+                          "S::~S() = delete;\n");
+            ASSERT_EQUALS(db->scopeList.size(), 2);
+            auto scope = db->scopeList.begin();
+            ASSERT(!scope->functionOf);
+            ++scope;
+            ASSERT_EQUALS(scope->className, "S");
+            ASSERT_EQUALS(scope->functionList.size(), 1);
+            auto it = scope->functionList.begin();
+            ASSERT_EQUALS(it->name(), "S");
+            ASSERT_EQUALS(it->tokenDef->linenr(), 2);
+            ASSERT(it->isDelete());
+            ASSERT(!it->isDefault());
+            ASSERT_EQUALS(it->type, Function::Type::eDestructor);
+        }
     }
 
     void symboldatabase109() { // #13553