Repository navigation
provider: unhandled rejection when SSE chunk-timeout cancels the fetch reader (suite red under Bun 1.4) #44943
Description
Found while running the packages/opencode suite under Bun 1.4.0 (bun@1.3.14 passes).
Both SSE chunk-timeout wrappers (packages/opencode/src/provider/provider.ts and packages/core/src/aisdk.ts) do on timeout:
ctl.abort(err)
void reader.cancel(err)
reject(err)
Under Bun 1.4, reader.cancel() on the just-aborted fetch body rejects, leaving an unhandled promise rejection. In bun test this fails the running test even though its assertions passed:
(fail) chunkTimeout raises a response stream error when SSE body stalls
Raw stream semantics (read/timeout race, rejected pull) behave identically on 1.3.14 and 1.4.0 in isolation, so the failure only materialises through the full fetch → wrapSSE → ai-sdk path.
Fix direction: handle the cancellation result (reader.cancel(err).catch(() => {})). With that plus relaxing one load-sensitive PTY poll deadline, the full suite is green under both runtimes (3339 tests, 0 fail each).
Activity