Merge

mypy/checker.py

@@ -5805,8 +5805,8 @@ def has_no_custom_eq_checks(t: Type) -> bool:
         # Restrict the type of the variable to True-ish/False-ish in the if and else branches
         # respectively
         original_vartype = self.lookup_type(node)
-        if not in_boolean_context:
-            # We don't check `:=` values in expresions like `(a := A())`,
+        if in_boolean_context:
+            # We don't check `:=` values in expressions like `(a := A())`,
             # because they produce two error messages.
             self._check_for_truthy_type(original_vartype, node)
         vartype = try_expanding_sum_type_to_union(original_vartype, "builtins.bool")