# D093 finalizer_failed

URL: /docs/errors/D093
Markdown: /docs/errors/D093.md

> On the WASM runtime, a finalizer (the cleanup of Fs.with_file and similar) failed with an error.

A runtime defect: the running program stops with it; no compile phase reports it, and `try` cannot catch it. `sakura explain D093` prints this explanation offline.

On the WASM runtime, a finalizer (the cleanup of `Fs.with_file` and similar) failed with an error.
A finalizer may not raise; handle the error inside it (`runtime/rt/ABI.md` §6.4).

Runtime defects come from running programs, so `compiler/tests/ui` has no fixture for them; the explanation above names the repair.