@Rogi - you seem to have a problem with your keyboard - the 'h' and 'e' keys seem to have been swapped.

The docs are wrong regardless - I don't think anyone would suggest the behaviour match the docs regarding SystemError - having Py_Main return on SystemError would be backwards incompatible.

Given the discussion in those docs about SystemError, I'm confident that the person who wrote the docs was simply attempting to document the actual implementation and made an error.  The implementation has, as far as I know, always worked the way it does (ie, there has never been a regression in this).  So IMO there are 2 issues:

* The documentation should be made to reflect the actual and historic behaviour.  The fact it doesn't is a clear bug and it should be addressed ASAP and without changing the behaviour so people are not misled in the future.  This change should be easy and non-controversial.

* You may have a desire to change the actual and historic implementation, which I can understand.  However, this should be tackled in a new "feature request".  If the feature request is accepted, then both the behaviour and the docs should be changed to match the new agreed behaviour.  This change would be harder and may well be controversial, depending on a perception on how many people rely on the current behaviour regardless of what the docs say.