msetup: do not print bogus "Option ... is:" messages

get_non_matching_default_options is checking a string from
project_default_options against a validated value from
coredata.options.

Passing the string to validate_value ensures that the comparison
is sound; otherwise, "false" might be compared against False
and a bogus difference is printed.

mesonbuild/interpreter.py

@@ -2447,7 +2447,12 @@ class Interpreter(InterpreterBase):
     def get_non_matching_default_options(self) -> T.Iterator[T.Tuple[str, str, coredata.UserOption]]:
         for def_opt_name, def_opt_value in self.project_default_options.items():
             cur_opt_value = self.coredata.options.get(def_opt_name)
-            if cur_opt_value is not None and def_opt_value != cur_opt_value.value:
+            try:
+                if cur_opt_value is not None and cur_opt_value.validate_value(def_opt_value) != cur_opt_value.value:
+                    yield (str(def_opt_name), def_opt_value, cur_opt_value)
+            except mesonlib.MesonException:
+                # Since the default value does not validate, it cannot be in use
+                # Report the user-specified value as non-matching
                 yield (str(def_opt_name), def_opt_value, cur_opt_value)
 
     def build_func_dict(self):

run_unittests.py

@@ -4002,7 +4002,8 @@ class AllPlatformTests(BasePlatformTests):
 
         # Verify default values when passing no args that affect the
         # configuration, and as a bonus, test that --profile-self works.
-        self.init(testdir, extra_args=['--profile-self', '--fatal-meson-warnings'])
+        out = self.init(testdir, extra_args=['--profile-self', '--fatal-meson-warnings'])
+        self.assertNotIn('[default: true]', out)
         obj = mesonbuild.coredata.load(self.builddir)
         self.assertEqual(obj.options[OptionKey('default_library')].value, 'static')
         self.assertEqual(obj.options[OptionKey('warning_level')].value, '1')