Exceptions now use a toString(sink) method for formatting instead of the toString() method inherited from Object. However, the exceptions defined in core.exception (and possibly exceptions in Phobos as well) were not updated to use this new method. Many of the exceptions have a toString() method for custom output, and this is no longer working.
Please change all relevant exceptions to use toString(sink) instead of toString(). Also, consider removing toString() from Throwable, since its presence is misleading.
Comment #1 by robert.schadek — 2024-12-07T13:33:27Z