btree creashing with ESP-IDF 5.2

[xyzzy42]

Checks

• I agree to follow the MicroPython Code of Conduct to ensure a safe and respectful space for everyone.

• I've searched for existing issues matching this bug, and didn't find any.

Port, board and/or hardware

esp32-s3

MicroPython version

MicroPython v1.23.0-preview.322.g5114f2c1e on 2024-04-09; Generic ESP32S3 module with
v1.22.0-323-g5114f2c1e

Reproduction

import btree
db = btree.open(open("database.db","w+b"))
db.close()
db[b'1']

Expected behaviour

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [Errno 22] EINVAL

Observed behaviour

Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.

Core 1 register dump:
PC : 0x420310ce PS : 0x00060f30 A0 : 0x82030b61 A1 : 0x3fcbb250
A2 : 0x3fcaa46c A3 : 0x00000001 A4 : 0x00000000 A5 : 0x00000000
A6 : 0x00000000 A7 : 0x3fcbb250 A8 : 0xe266e3dd A9 : 0xe266e3dd
A10 : 0x3c181650 A11 : 0x00000000 A12 : 0x00000000 A13 : 0x3fca393c
A14 : 0x3fcbb470 A15 : 0x3fcbb490 SAR : 0x0000001c EXCCAUSE: 0x0000001c
EXCVADDR: 0xe266e3f1 LBEG : 0x400570e8 LEND : 0x400570f3 LCOUNT : 0xffffffff

Backtrace: 0x420310cb:0x3fcbb250 0x42030b5e:0x3fcbb290 0x4202ea32:0x3fcbb2d0 0x4202d961:0x3fcbb320 0x42021a0d:0x3fcbb370 0x4200b1dc:0x3fcbb3b0 0x40378089:0x3fcbb3d0 0x4200d653:0x3fcbb470 0x420149d1:0x3fcbb4c0 0x420149e6:0x3fcbb4e0 0x42022713:0x3fcbb500 0x42022a08:0x3fcbb590 0x42006238:0x3fcbb5d0

Additional Information

The expected behavior occurs with ESP-IDF v5.1.3, while the crash is with ESP-IDF v5.2 and v5.2.1.

I tested a number of Micropython versions and ESP-IDF versions. The consistent factor is that something changed between esp-idf v5.2 and v5.1.3 that causes this crash.