gh-120225: fix crash in compiler on empty block at end of exception handler

[iritkatriel]

Fixes #120225.

It's not necessary to set a line number here. It can be propagated later (and if it's not that's also ok, JUMP_NO_INTERRUPT doesn't require a line number).

• Issue: flowgraph.c: push_cold_blocks_to_end: Assertion `prev_instr' failed #120225

[iritkatriel]

This was missing here - it is needed later for line number propagation to work.

[carljm]

I guess the exception handling block is coming from inlining this comprehension?

[miss-islington-app]

Thanks @iritkatriel for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-120249 is a backport of this pull request to the 3.13 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Debian root 3.13 has failed when building commit 3be7e91.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/1441/builds/153) and take a look at the build logs.
4. Check if the failure is related to this commit (3be7e91) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/1441/builds/153

Failed tests:

• test_os

Failed subtests:

• test_timerfd_ns_interval - test.test_os.TimerfdTests.test_timerfd_ns_interval

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/test_os.py", line 4389, in test_timerfd_ns_interval
    self.assertEqual(self.read_count_signaled(fd), 1)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 2 != 1


Traceback (most recent call last):
  File "/root/buildarea/3.13.angelico-debian-amd64/build/Lib/test/test_os.py", line 4397, in test_timerfd_ns_interval
    self.assertEqual(self.read_count_signaled(fd), count)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 4 != 3