[BUG] Recursion limit exceeded in sire.base.wrap

[lohedges]

I'm intermittently seeing a recursion limit warning triggered by the sire.base.wrap function:

Exception ignored in: <function _xla_gc_callback at 0x7135fe122a20>
Traceback (most recent call last):
  File "/home/lester/miniconda3/envs/openbiosim/lib/python3.12/site-packages/sire/legacy/Base/__init__.py", line 39, in wrap
RecursionError: maximum recursion depth exceeded
Exception ignored in: <function _xla_gc_callback at 0x7135fe122a20>
Traceback (most recent call last):
  File "/home/lester/miniconda3/envs/openbiosim/lib/python3.12/site-packages/sire/legacy/Base/__init__.py", line 39, in wrap
RecursionError: maximum recursion depth exceeded

This is triggered by the following block of code, specifically where the return wrap(u) part:

sire/wrapper/Base/__init__.py

Lines 37 to 44 in d3a0e2c

	# is this a unit?
	try:
	u = _Units.GeneralUnit(value)
	if not u.is_dimensionless():
	return wrap(u)
	except Exception:
	pass

[lohedges]

The recursive wrap is needed, i.e. the tests fail without it. If I replace the pass in the exception block with raise, then I see:

import sire as sr
sr.base.wrap("1ps")

RecursionError: maximum recursion depth exceeded

So, it looks like on some setups we will be warned that the recursion depth is exceeded.