This is minimal reproduction of the issue with the astro project.
# Initialize the project, with all options default
bun --bun create astro
# Add lightningcss
bun add -D lightningcss
# (edit astro.config.mjs to use lightningcss)
# Launch the dev server
RUST_BACKTRACE=full bun --bun run dev> RUST_BACKTRACE=full bun --bun run dev
13:42:27 [types] Generated 1ms
astro v4.15.4 ready in 74 ms
┃ Local http://localhost:4321/
┃ Network use --host to expose
13:42:27 watching for file changes...
thread '<unnamed>' panicked at napi/src/threadsafe_function.rs:235:57:
called `Result::unwrap()` on an `Err` value: Error { status: InvalidArg, reason: "expect Function, got: Object", maybe_raw: 0x0 }
stack backtrace:
0: 0x98379637713 - <unknown>
1: 0x98378e47ad0 - <unknown>
2: 0x9837960b722 - <unknown>
3: 0x983796391ee - <unknown>
4: 0x98379638970 - <unknown>
5: 0x98379639b37 - <unknown>
6: 0x98379639540 - <unknown>
7: 0x98379639496 - <unknown>
8: 0x9837963948f - <unknown>
9: 0x98378e29414 - <unknown>
10: 0x98378e298c2 - <unknown>
11: 0x983795e2dbe - <unknown>
12: 0x3330fbc - <unknown>
13: 0x332e94c - <unknown>
14: 0x2f0fe3a - <unknown>
15: 0x2e22c15 - <unknown>
16: 0x3dd9bab - <unknown>
error: script "dev" was terminated by signal SIGABRT (Abort)
zsh: IOT instruction (core dumped) RUST_BACKTRACE=full bun --bun run dev