**System Information**
Operating system: macOS 12.1
Graphics card: M1 MBP
**Blender Version**
Broken: 3.0 with the attached userpref.blend
**Short description of error**
**Exact steps for others to reproduce the error**
from factory-startup:
- [1] type `//` in `Preferences` > `File Paths` > `Temporary Files`
- [2] `Export` > `Collada`
- crash
note: in a debug build, the following assert is hit after step [1]
```
./bin/blender(BLI_system_backtrace+0x26) [0xf4a5f1b]
./bin/blender(_BLI_assert_print_backtrace+0x16) [0xf344596]
./bin/blender(BLI_exists+0x2a) [0xf497c6c]
./bin/blender(BLI_is_dir+0x18) [0xf497d21]
./bin/blender() [0x3c2a38d]
./bin/blender(BKE_tempdir_init+0x27) [0x3c2a5e2]
./bin/blender() [0x4c1ec17]
./bin/blender() [0x4a2e592]
./bin/blender(RNA_property_update+0x50) [0x4a2e7ca]
./bin/blender() [0x55d728b]
./bin/blender() [0x55f3b4a]
./bin/blender() [0x435810e]
./bin/blender() [0x435e018]
./bin/blender() [0x435e5cc]
./bin/blender(wm_event_do_handlers+0x7a0) [0x435fd81]
./bin/blender(WM_main+0x30) [0x4351d2e]
./bin/blender() [0x3c236af]
/lib64/libc.so.6(+0x2d590) [0x7fb0c4842590]
/lib64/libc.so.6(__libc_start_main+0x89) [0x7fb0c4842649]
./bin/blender(_start+0x25) [0x3c23095]
BLI_assert failed: source/blender/blenlib/intern/storage.c:348, BLI_exists(), at '!BLI_path_is_rel(path)'
```