remote debugging: read_pylong is missing a PyErr_Format call

Bug report

Bug description:

I'm working on the Python Profiler at Datadog and while looking at how Tachyon is implemented, I noticed that I believe this error path is missing a call to PyErr_Format. This probably rarely happens (it would require the process to read corrupt memory) but I still think it's worth fixing.

I have a branch that adds the call if you're OK with adding it.

CPython versions tested on:

CPython main branch

Operating systems tested on:

macOS

Looks like this was already fixed in #146309, the relevant call is present in main:

cpython/Modules/_remote_debugging/object_reading.c

Lines 197 to 204 in 03d2f03

    
           // Validate size: reject garbage (negative or unreasonably large) 
        
           if (size < 0 || size > MAX_LONG_DIGITS) { 
        
               PyErr_Format(PyExc_RuntimeError, 
        
                   "Invalid PyLong digit count: %zd (expected 0-%d)", size, MAX_LONG_DIGITS); 
        
               set_exception_cause(unwinder, PyExc_RuntimeError, 
        
                   "Invalid PyLong size (corrupted remote memory)"); 
        
               return -1; 
        
           }

Ah! My main was outdated then, sorry for the false alarm. Closing.

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remote debugging: `read_pylong` is missing a `PyErr_Format` call #148447

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	// Validate size: reject garbage (negative or unreasonably large)
	if (size < 0 \|\| size > MAX_LONG_DIGITS) {
	PyErr_Format(PyExc_RuntimeError,
	"Invalid PyLong digit count: %zd (expected 0-%d)", size, MAX_LONG_DIGITS);
	set_exception_cause(unwinder, PyExc_RuntimeError,
	"Invalid PyLong size (corrupted remote memory)");
	return -1;
	}

remote debugging: read_pylong is missing a PyErr_Format call #148447

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Bug description:

CPython versions tested on:

Operating systems tested on:

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brianschubert commented on Apr 12, 2026

KowalskiThomas commented on Apr 12, 2026

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remote debugging: `read_pylong` is missing a `PyErr_Format` call #148447