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[3.11] gh-94215: Fix error handling for line-tracing events (GH-94681) (GH-94688)

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* Re-enable crasher
* Fix error handling for line-tracing events
* blurb add
(cherry picked from commit 23ee4a8067)

Co-authored-by: Brandt Bucher <brandtbucher@microsoft.com>
This commit is contained in:
Christian Heimes 2022-07-08 15:25:53 +02:00 • committed by GitHub
parent 73a1800b55
commit 36a3372d51
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3 changed files with 17 additions and 6 deletions
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19
Python/ceval.c
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@ -5642,16 +5642,25 @@ handle_eval_breaker:
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
tstate, frame, instr_prev);
// Reload possibly changed frame fields:
stack_pointer = _PyFrame_GetStackPointer(frame);
frame->stacktop = -1;
// next_instr is only reloaded if tracing *does not* raise.
// This is consistent with the behavior of older Python
// versions. If a trace function sets a new f_lineno and
// *then* raises, we use the *old* location when searching
// for an exception handler, displaying the traceback, and
// so on:
if (err) {
/* trace function raised an exception */
// next_instr wasn't incremented at the start of this
// instruction. Increment it before handling the error,
// so that it looks the same as a "normal" instruction:
next_instr++;
goto error;
}
/* Reload possibly changed frame fields */
// Reload next_instr. Don't increment it, though, since
// we're going to re-dispatch to the "true" instruction now:
next_instr = frame->prev_instr;
stack_pointer = _PyFrame_GetStackPointer(frame);
frame->stacktop = -1;
}
}
}