$ python ./crash.py 
sys.version=3.11.2 (main, Apr 28 2025, 14:11:48) [GCC 12.2.0]
pymupdf.version=('1.26.4', '1.26.7', None)
corrupted double-linked list
Aborted

import pymupdf
def crash():
 doc1 = pymupdf.open("a.pdf")
 for i in range(6):
 doc1.load_page(i).get_pixmap()
 doc2 = pymupdf.open("b.pdf")
 for i in range(6):
 doc2.load_page(i).get_pixmap()
if __name__ == '__main__':
 import sys
 print(f"sys.version={sys.version}")
 print(f"pymupdf.version={pymupdf.version}")
 crash()