t/deep_nesting.t not testing intended?

[scop]

t/deep_nesting.t documents:

XML-Parser/t/deep_nesting.t

Lines 5 to 6 in 835610c

	# Test for deeply nested elements to exercise st_serial_stack reallocation.
	# This catches off-by-one errors in the stack growth check (GH #39).

However, it does not seem to do what it says on the tin. I cannot provoke a failure with any XML::Parser version using this file. Tested e.g. from git tags 2.46 and 2.47 which should have the issue fixed in #39 (Ubuntu 25.10 amd64, perl 5.40.1), no failure. Not even bumping $depth to 6_000_000 provokes one for me.