Fix #12393 Stack overflow in accumulateStructMembers() (#5926)

Author: chrchr-github

lib/symboldatabase.cpp

@@ -7201,6 +7201,8 @@ static const Token* parsedecl(const Token* type,
         if (!type->originalName().empty())
             valuetype->originalTypeName = type->originalName();
         type = type->next();
+        if (type && type->link() && type->str() == "<")
+            type = type->link()->next();
     }
 
     // Set signedness for integral types..

test/testsymboldatabase.cpp

@@ -225,6 +225,7 @@ class TestSymbolDatabase : public TestFixture {
         TEST_CASE(VariableValueType4); // smart pointer type
         TEST_CASE(VariableValueType5); // smart pointer type
         TEST_CASE(VariableValueTypeReferences);
+        TEST_CASE(VariableValueTypeTemplate);
 
         TEST_CASE(findVariableType1);
         TEST_CASE(findVariableType2);
@@ -1370,6 +1371,26 @@ class TestSymbolDatabase : public TestFixture {
         }
     }
 
+    void VariableValueTypeTemplate() {
+        {
+            GET_SYMBOL_DB("template <class T>\n" // #12393
+                          "struct S {\n"
+                          "    struct U {\n"
+                          "        S<T>* p;\n"
+                          "    };\n"
+                          "    U u;\n"
+                          "};\n");
+            const Variable* const p = db->getVariableFromVarId(1);
+            ASSERT_EQUALS(p->name(), "p");
+            ASSERT(p->valueType());
+            ASSERT(p->valueType()->pointer == 1);
+            ASSERT(p->valueType()->constness == 0);
+            ASSERT(p->valueType()->reference == Reference::None);
+            ASSERT_EQUALS(p->scope()->className, "U");
+            ASSERT_EQUALS(p->typeScope()->className, "S");
+        }
+    }
+
     void findVariableType1() {
         GET_SYMBOL_DB("class A {\n"
                       "public:\n"

test/testtype.cpp

@@ -403,6 +403,16 @@ class TestType : public TestFixture {
               "    long long j = *(p++);\n"
               "}\n", settings);
         ASSERT_EQUALS("", errout.str());
+
+        check("template <class T>\n" // #12393
+              "struct S {\n"
+              "    S& operator=(const S&) { return *this; }\n"
+              "    struct U {\n"
+              "        S<T>* p;\n"
+              "    };\n"
+              "    U u;\n"
+              "};\n", settings);
+        ASSERT_EQUALS("", errout.str()); // don't crash
     }
 
     void longCastReturn() {