GeezerVison

Summary

Call the preserve_exc truth-value converter before restrict and interpreter-id resolution in _interpreters.call.

CPython 3.15's Clinic wrapper calls PyObject_IsTrue(preserve_exc) even though the implementation currently ignores the resulting flag. Skipping this conversion suppresses user callbacks and exceptions, and changes their priority relative to restrict and id errors.

This narrowly keeps the existing FuncArgs, ArgSpec, argument checks, and ownership unchanged. It does not migrate the module's 14 remaining generic signatures or claim full Clinic parity.

The regression covers conversion exceptions/order, tuple/dict checks preceding flag conversion, and temporary flags retaining their original lifetime and cleanup order for both **dict insertion orders. A wider typed-argument migration was deliberately excluded because it changed observable finalization order.

Validation

• Workspace tests, CAPI tests, workspace/CAPI strict Clippy, clean release build and normal commit hooks pass.
• Focused regression passes on CPython 3.15.1 and RustPython; the full existing stdlib_subinterpreters.py snippet also passes on RustPython.
• All 273 pre-existing binding/error observations match the unchanged main binary. Four direct/**dict call forms retain their original ownership order; the only added trace event is the required preserve_exc truth conversion.
• Full raw signature inventory is unchanged (16,227 observed paths); no Guard raw and inspected signature observations in CI #9628 baseline refresh is required for this patch.
• test_interpreters.test_api was attempted but skipped entirely with GIL disabled (zero tests ran), not counted as passed coverage.
• The pytest wrapper is unavailable; its previously denied installation was not retried. The snippet was executed directly.

Summary by CodeRabbit

• Bug Fixes
  • Corrected the order in which interpreter call options are validated, so errors in preserve_exc are reported before errors in restrict or interpreter ID lookup.
  • Invalid arguments are still rejected before either option is converted.