As noted in the issue: https://bugs.python.org/issue15870#msg402800 `PyType_FromSpec` assumes that the `name` passed is persistent for the program lifetime.  This seems wrong/unnecessary: We are creating a heap-type, a heap-type's name is stored as a unicode object anyway!

So, there is no reason to require the string be persistent, and a program that decides to build a custom name dynamically (for whatever reasons) would run into a crash when the name is accessed.

The code:

https://github.com/python/cpython/blob/0c50b8c0b8274d54d6b71ed7bd21057d3642f138/Objects/typeobject.c#L3427

Should be modified to point to to the `ht_name` (utf8) data instead.  My guess is, the simplest solution is calling `type_set_name`, even if that runs some unnecessary checks.

I understand that the FromSpec API is mostly designed to replace the static type definition rather than extend it, but it seems an unintentional/strange requirement.