new TestUopsOptimization test case failing an assert#117180
Description
Bug report
Bug description:
While writing test cases for #116168, I ran into a case that failed on main too. Here's the test as a diff. It's under test_opt.TestUopsOptimization:
diff --git a/Lib/test/test_capi/test_opt.py b/Lib/test/test_capi/test_opt.py index b0859a382d..269753e4c1 100644 --- a/Lib/test/test_capi/test_opt.py+++ b/Lib/test/test_capi/test_opt.py@@ -955,6 +955,31 @@ def testfunc(n): _, ex = self._run_with_optimizer(testfunc, 16) self.assertIsNone(ex) + def test_many_nested(self):+ # overflow the trace_stack+ def dummy_a(x):+ return x+ def dummy_b(x):+ return dummy_a(x)+ def dummy_c(x):+ return dummy_b(x)+ def dummy_d(x):+ return dummy_c(x)+ def dummy_e(x):+ return dummy_d(x)+ def dummy_f(x):+ return dummy_e(x)+ def dummy_g(x):+ return dummy_f(x)+ def dummy_h(x):+ return dummy_g(x)+ def testfunc(n):+ a = 0+ for _ in range(n):+ a += dummy_h(n)+ return a++ self._run_with_optimizer(testfunc, 32) if __name__ == "__main__": unittest.main()I'm running this locally (source build of main9967b568edd2e35b0415c14c7242f3ca2c0dc03d on an M1 mac).
Command:
./python.exe -m test test.test_capi.test_opt Output:
Using random seed: 1780919823 Raised RLIMIT_NOFILE: 256 -> 1024 0:00:00 load avg: 2.88 Run 1 test sequentially 0:00:00 load avg: 2.88 [1/1] test.test_capi.test_opt Assertion failed: ((this_instr + 2)->opcode == _PUSH_FRAME), function optimize_uops, file optimizer_cases.c.h, line 1600. Fatal Python error: Aborted Current thread 0x000000020140a100 (most recent call first): File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/test/test_capi/test_opt.py", line 979 in testfunc File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/test/test_capi/test_opt.py", line 588 in _run_with_optimizer File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/test/test_capi/test_opt.py", line 982 in test_many_nested File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/unittest/case.py", line 589 in _callTestMethod ....[truncated for brevity].... File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/runpy.py", line 88 in _run_code File "/Users/peterlazorchak/repos/oss-clones/forks/cpython/Lib/runpy.py", line 198 in _run_module_as_main Extension modules: _testcapi, _testinternalcapi (total: 2) zsh: abort ./python.exe -m test test.test_capi.test_opt This assertion is in the optimizer case for _INIT_CALL_PY_EXACT_ARGS. I haven't investigated any further beyond that.
CPython versions tested on:
CPython main branch
Operating systems tested on:
macOS