From 7881b99547453f07d557b9254c972111d438c672 Mon Sep 17 00:00:00 2001
From: chrchr-github <78114321+chrchr-github@users.noreply.github.com>
Date: Fri, 10 Mar 2023 19:04:46 +0100
Subject: [PATCH] Fix #10259 debug: SymbolDatabase couldn't resolve all user
 defined types (#4879)

---
 lib/symboldatabase.cpp      |  2 ++
 test/testsymboldatabase.cpp | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index b93c7c67e..c17b03d6d 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -891,6 +891,8 @@ void SymbolDatabase::createSymbolDatabaseNeedInitialization()
             for (Scope& scope : scopeList) {
                 if (!scope.isClassOrStructOrUnion())
                     continue;
+                if (scope.classDef && Token::simpleMatch(scope.classDef->previous(), ">")) // skip uninstantiated template
+                    continue;
 
                 if (!scope.definedType) {
                     mBlankTypes.emplace_back();
diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index 47a21e319..0d4990bf3 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -267,6 +267,7 @@ private:
         TEST_CASE(namespaces2);
         TEST_CASE(namespaces3);  // #3854 - unknown macro
         TEST_CASE(namespaces4);
+        TEST_CASE(needInitialization);
 
         TEST_CASE(tryCatch1);
 
@@ -2790,6 +2791,20 @@ private:
         ASSERT_EQUALS(2U, fredAType->classDef->linenr());
     }
 
+    void needInitialization() { // #10259
+        const auto oldSettings = settings1;
+        settings1.debugwarnings = true;
+
+        GET_SYMBOL_DB("template <typename T>\n"
+                      "struct A {\n"
+                      "    using type = T;\n"
+                      "    type t_;\n"
+                      "};\n");
+        ASSERT_EQUALS("", errout.str());
+
+        settings1 = oldSettings;
+    }
+
     void tryCatch1() {
         const char str[] = "void foo() {\n"
                            "    try { }\n"