GH-121012: Set index to -1 when list iterators become exhausted in tier 2

[markshannon]

• Issue: Incorrect optimization in JIT build #121012

[Eclips4]

Thanks

[miss-islington-app]

Thanks @markshannon for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[bedevere-app]

GH-121494 is a backport of this pull request to the 3.13 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 RHEL8 3.13 has failed when building commit 2f8919e.

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/1394/builds/216) and take a look at the build logs.
4. Check if the failure is related to this commit (2f8919e) 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/1394/builds/216

Failed tests:

• test_smtplib

Failed subtests:

• test_with_statement_QUIT_failure - test.test_smtplib.SMTPSimTests.test_with_statement_QUIT_failure
• test_with_statement - test.test_smtplib.SMTPSimTests.test_with_statement

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/test/test_smtplib.py", line 1243, in test_with_statement_QUIT_failure
    smtp.noop()
    ~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 525, in noop
    return self.docmd("noop")
           ~~~~~~~~~~^^^^^^^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 432, in docmd
    return self.getreply()
           ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 405, in getreply
    raise SMTPServerDisconnected("Connection unexpectedly closed")
smtplib.SMTPServerDisconnected: Connection unexpectedly closed


Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/test/test_smtplib.py", line 1233, in test_with_statement
    code, message = smtp.noop()
                    ~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 525, in noop
    return self.docmd("noop")
           ~~~~~~~~~~^^^^^^^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 432, in docmd
    return self.getreply()
           ~~~~~~~~~~~~~^^
  File "/home/buildbot/buildarea/3.13.cstratak-RHEL8-x86_64/build/Lib/smtplib.py", line 405, in getreply
    raise SMTPServerDisconnected("Connection unexpectedly closed")
smtplib.SMTPServerDisconnected: Connection unexpectedly closed