Add test for #11841 (#8621)

Co-authored-by: chrchr-github <noreply@github.com>

Author: chrchr-github

test/testsymboldatabase.cpp

@@ -430,6 +430,7 @@ class TestSymbolDatabase : public TestFixture {
         TEST_CASE(symboldatabase110);
         TEST_CASE(symboldatabase111); // [[fallthrough]]
         TEST_CASE(symboldatabase112); // explicit operator
+        TEST_CASE(symboldatabase113);
 
         TEST_CASE(createSymbolDatabaseFindAllScopes1);
         TEST_CASE(createSymbolDatabaseFindAllScopes2);
@@ -5864,6 +5865,33 @@ class TestSymbolDatabase : public TestFixture {
         ASSERT(f && f->function() && f->function()->isExplicit());
     }
 
+    void symboldatabase113() { // #11841
+        GET_SYMBOL_DB("template <typename T>\n"
+                      "struct S {\n"
+                      "  S();\n"
+                      "  int& g() { return a; }\n"
+                      "  struct I;\n"
+                      "private:\n"
+                      "  int a;\n"
+                      "};\n"
+                      "template <>\n"
+                      "struct S<int>::I{};\n");
+        ASSERT(db->scopeList.size() == 4);
+        auto it = db->scopeList.begin();
+        ++it;
+        ASSERT_EQUALS_ENUM(ScopeType::eStruct, it->type);
+        ASSERT_EQUALS("I", it->className);
+        ASSERT_EQUALS(0, it->varlist.size());
+        ++it;
+        ASSERT_EQUALS_ENUM(ScopeType::eStruct, it->type);
+        ASSERT_EQUALS("S < int >", it->className);
+        ASSERT_EQUALS(1, it->varlist.size());
+        ++it;
+        ASSERT_EQUALS_ENUM(ScopeType::eFunction, it->type);
+        ASSERT_EQUALS("g", it->className);
+        ASSERT_EQUALS(0, it->varlist.size());
+    }
+
     void createSymbolDatabaseFindAllScopes1() {
         GET_SYMBOL_DB("void f() { union {int x; char *p;} a={0}; }");
         ASSERT(db->scopeList.size() == 3);