malloc: double free on Mac M1

[DSLituiev]

Versions:

• OS: Mac M1
• Psycopg version: '2.9.9 (dt dec pq3 ext lo64)' (from master
• Python version: 3.10.14

Describe the bug
Upon psycopg2.connect,

python(46885,0x203d8fac0) malloc: double free for ptr 0x1243fd200
python(46885,0x203d8fac0) malloc: *** set a breakpoint in malloc_error_break to debug
Abort trap: 6

[dvarrazzo]

Did you upgrade the system recently and have a mix of new and old libraries?

Can we have more information? Such as:

• are you using the binary or c extension? What does psycopg.pq.impl say?
• are you connecting using ldap or other authentication systems
• are you using an encrypted connection? What happens if you disable encryption?
• can you connect using psql and using exactly the same connection string?
• can you create a core dump and check where the crash happened?

[dvarrazzo]

Not enough info. Probably caused by some buggy macOS library.