gh-132132: Upgrade to VS 2026 on Windows tailcall CI

[Fidget-Spinner]

This save us a lot of CI resources as we don't need to choco install anything now.

• Issue: Improve the tail calling CI #132132

[hugovk]

For reference: https://github.blog/changelog/2026-02-05-github-actions-early-february-2026-updates/#windows-server-2025-with-visual-studio-2026-image-now-available-for-github-hosted-runners

[hugovk]

Suggested change

	# Pending https://github.com/rhysd/actionlint/issues/533
	# and https://github.com/rhysd/actionlint/issues/571
	# Pending https://github.com/rhysd/actionlint/pull/615

[hugovk]

Suggested change

	labels: ["windows-11-arm", "macos-15-intel", "windows-2025-vs2026"]
	labels: ["windows-2025-vs2026"]

[hugovk]

Hmm, the runner doesn't seem to be available:

x86_64-pc-windows-msvc/msvc
Started 1h 22m 49s ago
Requested labels: windows-2025-vs2026
Job defined at: python/cpython/.github/workflows/tail-call.yml@refs/pull/144516/merge
Waiting for a runner to pick up this job...
Evaluating tail-call.if
Evaluating: success()
Result: true

https://github.com/python/cpython/actions/runs/21721176273/job/62651063296?pr=144516

[hugovk]

Looks like they announced availability prematurely and they'll need to merge actions/runner-images#13635 first.

[hugovk]

It's running now and test_dtrace is failing, for example:

======================================================================
FAIL: test_verify_call_opcodes (test.test_dtrace.DTraceOptimizedTests.test_verify_call_opcodes)
Ensure our call stack test hits all function call opcodes
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 149, in test_verify_call_opcodesself.assertEqual(set(), opcodes)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^AssertionError: Items in the second set but not the first:
'CALL_FUNCTION'
'CALL_FUNCTION_KW'

And:

======================================================================
FAIL: test_gc (test.test_dtrace.DTraceNormalTests.test_gc)
----------------------------------------------------------------------
Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 38, in normalize_trace_output
result.sort(key=lambdarow: int(row[0]))
~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 38, in <lambda>
result.sort(key=lambdarow: int(row[0]))
~~~^^^^^^^^ValueError: invalid literal for int() with base 10: 'dtrace: failed to compile script D:\\a\\cpython\\cpython\\Lib\\test\\dtracedata\\gc.d: line 1: pid provider is not installed on this system'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 152, in test_gcself.run_case("gc")
~~~~~~~~~~~~~^^^^^^
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 119, in run_case
actual_output, expected_output =self.backend.run_case(
~~~~~~~~~~~~~~~~~~~~~^
name, optimize_python=self.optimize_python)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 53, in run_case
actual_output = normalize_trace_output(self.trace_python(
script_file=abspath(name +self.EXTENSION),
python_file=abspath(name +".py"),
optimize_python=optimize_python))
File "D:\a\cpython\cpython\Lib\test\test_dtrace.py", line 42, in normalize_trace_outputraiseAssertionError(
"tracer produced unparsable output:\n{}".format(output)
)
AssertionError: tracer produced unparsable output:dtrace: failed to compile script D:\a\cpython\cpython\Lib\test\dtracedata\gc.d: line 1: pid provider is not installed on this system

https://github.com/python/cpython/actions/runs/21721176273/job/62741886874?pr=144516

[Fidget-Spinner]

@hugovk apparently this is a prior known bug for this runner #138744

I suggest we just skip the test on Windows 11?

[vstinner]

I suggest we just skip the test on Windows 11?

test_dtrace can be skipped on Windows, yes.

[Fidget-Spinner]

Sorry I realised I opened the PR from the wrong branch. Let me close and re-open another PR

[Fidget-Spinner]

New PR open at #144544