Steps To Reproduce

The issue is illustrated with the following code:

d = 12936642
K = QuadraticField(d)
K.unit_group(proof=False)

Expected Behavior

The code should compute the unit group without an issue, since directly calling pari.bnfinit(f'x^2 - {d}', 1) computes the unit group structure in a fraction of second.

Actual Behavior

Instead, the code produces a bunch of errors including:

KeyError: ((<class 'sage.rings.number_field.unit_group.UnitGroup'>, Number Field in a with defining polynomial x^2 - 12936642 with a = 3596.754370262167?, False), ())

and

PariError: the PARI stack overflows (current size: 1024000000; maximum size: 1073741824)

Additional Information

The "PariError: the PARI stack overflows" appears to be quite irrelevant to computing the unit group since

• direct call to pari.bnfinit(f'x^2 - {d}', 1) runs fine with the same size of PARI stack;
• increasing PARI stack even to 2GB does not help here as the same errors show up.

Environment

- **OS**: Ubuntu 22.04.3 LTS
- **Sage Version**: 10.2.beta5

Checklist

• I have searched the existing issues for a bug report that matches the one I want to file, without success.
• I have read the documentation and troubleshoot guide