From 185e56ded1ca512821d9a33999f8aecd93734d7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Tue, 14 Jan 2025 12:40:05 +0100
Subject: [PATCH 1/2] add test

---
 test/testsymboldatabase.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index f5a774ee821..42eee80787b 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -424,6 +424,7 @@ class TestSymbolDatabase : public TestFixture {
         TEST_CASE(symboldatabase106);
         TEST_CASE(symboldatabase107);
         TEST_CASE(symboldatabase108);
+        TEST_CASE(symboldatabase109); // #13553
 
         TEST_CASE(createSymbolDatabaseFindAllScopes1);
         TEST_CASE(createSymbolDatabaseFindAllScopes2);
@@ -5710,6 +5711,18 @@ class TestSymbolDatabase : public TestFixture {
         }
     }
 
+    void symboldatabase109() { // #13553
+        GET_SYMBOL_DB("extern \"C\" {\n"
+                      "class Base {\n"
+                      "public:\n"
+                      "    virtual void show(void) = 0;\n"
+                      "};\n"
+                      "}\n");
+        const Token *f = db ? Token::findsimplematch(tokenizer.tokens(), "show") : nullptr;
+        ASSERT(f != nullptr);
+        ASSERT(f && f->function() && f->function()->hasVirtualSpecifier());
+    }
+
     void createSymbolDatabaseFindAllScopes1() {
         GET_SYMBOL_DB("void f() { union {int x; char *p;} a={0}; }");
         ASSERT(db->scopeList.size() == 3);

From 5c6e8d57bf54a572658bffc0ff2f0bf1d24f7725 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludvig=20Gunne=20Lindstr=C3=B6m?=
 <ludviggunnelindstrom@gmail.com>
Date: Tue, 14 Jan 2025 12:40:15 +0100
Subject: [PATCH 2/2] fix #13553

---
 lib/symboldatabase.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 2ad9d487599..6488f1aeeee 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -2639,6 +2639,9 @@ const Token *Function::setFlags(const Token *tok1, const Scope *scope)
     if (tok1->isInline())
         isInlineKeyword(true);
 
+    if (tok1->isExternC())
+        isExtern(true);
+
     // look for end of previous statement
     while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:")) {
         tok1 = tok1->previous();
@@ -2647,7 +2650,7 @@ const Token *Function::setFlags(const Token *tok1, const Scope *scope)
             isInlineKeyword(true);
 
         // extern function
-        if (tok1->isExternC() || tok1->str() == "extern") {
+        if (tok1->str() == "extern") {
             isExtern(true);
         }