Fixed #11907 (False positive: uninitialized member (mutable member, const method call)) (#5384)

Author: danmar

lib/checkclass.cpp

@@ -988,6 +988,14 @@ void CheckClass::initializeVarList(const Function &func, std::list<const Functio
                 else if (!member->isConst() && !member->isStatic()) {
                     assignAllVar(usage);
                 }
+
+                // const method, assume it assigns all mutable members
+                else if (member->isConst()) {
+                    for (Usage& i: usage) {
+                        if (i.var->isMutable())
+                            i.assign = true;
+                    }
+                }
             }
 
             // not member function

test/testconstructors.cpp

@@ -116,6 +116,7 @@ class TestConstructors : public TestFixture {
         TEST_CASE(initvar_chained_assign);      // BUG 2270433
         TEST_CASE(initvar_2constructors);       // BUG 2270353
         TEST_CASE(initvar_constvar);
+        TEST_CASE(initvar_mutablevar);
         TEST_CASE(initvar_staticvar);
         TEST_CASE(initvar_brace_init);
         TEST_CASE(initvar_union);
@@ -1194,6 +1195,18 @@ class TestConstructors : public TestFixture {
     }
 
 
+    void initvar_mutablevar() {
+        check("class Foo {\n"
+              "public:\n"
+              "    Foo() { update(); }\n"
+              "private:\n"
+              "    void update() const;\n"
+              "    mutable int x;\n"
+              "};");
+        ASSERT_EQUALS("", errout.str());
+    }
+
+
     void initvar_staticvar() {
         check("class Fred\n"
               "{\n"