Biome randomly crashing

[jpike88]

error I get:
/Users/runner/work/biome/biome/crates/biome_text_size/src/range.rs:73:9
Thread Name: tokio-runtime-worker
Message: assertion failed: start.raw <= end.raw
Stack Trace: Re-run with RUST_BACKTRACE=1 to capture the stack trace

Log file attached .

I have no idea what's causing it right now.

server.log.2026-03-18-06.zip

[dyc3]

tests/src/playwright/shard_7/36_booking_with_multiple_slots.spec.ts seems to be the file that caused the panic. does it happen with the cli?

[jpike88]

It's a MAJOR pain trying to figure this one out.

It seems to happen on other files too.

When it happens, i usually don't notice striaght away, as the crash just happens in the background.

When I notice it, I restart the language server, then I undo as many times as I can to try and get it to happen. It doesn't happen.

Here's another log file:

server.log.2026-03-20-04.zip

[jpike88]

I just managed to trigger it. It happens when I switch git branches in the background!

I think the biome daemon should watch the current commit and gracefully refresh or something, it's definitely happening there. There is literally one or two files with some changes in between the branches... but that's how I can somewhat reliably trigger it.

[ematipico]

Definitely not ideal. We have a assert! in production, which panics. We might not be able to understand the bug, but at least we can change the code and avoid the panic.

[jpike88]

Tested on latest biome commit, looks like it's fixed. don't mean to hrury you... but would be great to get that release out as my team could use it!

Thanks