CI flake: Smoketests - pnpm build failed despite reporting success

[clockwork-labs-bot]

Detected by CI Gremlin after a failed GitHub Actions attempt succeeded on rerun.

Tests:

• smoketests::views::test_typescript_count_view_subscription_refreshes

Error:
thread 'smoketests::views::test_typescript_count_view_subscription_refreshes' (81742) panicked at crates/smoketests/tests/smoketests/views.rs:946:10:
called Result::unwrap() on an Err value: pnpm build (in "/home/runner/actions-runner/_work/SpacetimeDB/SpacetimeDB/crates/bindings-typescript") failed:

Failed job runs:

• https://github.com/clockworklabs/SpacetimeDB/actions/runs/29300134265/job/86982370383 (Smoketests (Linux), attempt 1 -> 2)

Timeout detection:

• none

Context:

• none

[clockwork-labs-bot]

Exact-attempt diagnosis for the linked job:

• Run/job: CI run 29300134265, job 86982370383, Smoketests (Linux), attempt 1, PR docs: add Convex migration guide #5536 at 9fb5e6d3ca6290cfc6e30fb33fcfb2b8b46dedbf.
• GitHub job API reports run_attempt: 1, runner ghr-github-self-hosted-ubuntu-14900k-03-spacetimedb-14-5da8fe31, started 2026-07-14T02:07:05Z, completed 2026-07-14T02:20:19Z, conclusion failure.
• The only failed workflow step was Run smoketests (Linux).
• Failure signature: smoketests::views::test_typescript_count_view_subscription_refreshes panicked at crates/smoketests/tests/smoketests/views.rs:946:10 while unwrapping the result of publishing/building the TypeScript module. The inner error was pnpm build (in ".../crates/bindings-typescript") failed.
• The pnpm build script is pnpm -s build:js && pnpm -s build:types. In this log, the visible tsup v8.5.0 / build:js output reports successful ESM/CJS builds, then the captured stderr section is empty. There is no visible TypeScript diagnostic, V8 fatal message, timeout, or assertion failure in the exact attempt log.

Root cause: the test did not fail in the view refresh assertion path. It failed while the smoketest was preparing the TypeScript module, because the TypeScript bindings package build returned nonzero. Given the visible successful tsup output and empty stderr, the most likely failing substep is the subsequent build:types (tsc -p tsconfig.build.json) or a silent/aborted package-manager child process, but the exact log does not expose the final child-process status or diagnostic.

Suggested title: CI flake: TypeScript count-view smoketest fails during bindings pnpm build

Duplicate analysis:

• I did not find a close duplicate for this exact signature (test_typescript_count_view_subscription_refreshes -> crates/bindings-typescript pnpm build returns nonzero after successful visible tsup output and empty stderr).
• Related but not a close duplicate: CI flake: v8 internal error during build #5366, CI flake: v8 internal error during build. It also tracks nondeterministic crates/bindings-typescript build failures, but the tracked signature there is a Node/V8 fatal unreachable code / SIGTRAP during tsup. This exact attempt does not show that fatal crash text.
• Related closed history: CI flake: Test Suite #5370 includes a secondary attempt that collapsed to CI flake: v8 internal error during build #5366 for the V8/tsup crash signature. It does not match this exact attempt because CI flake: Smoketests - pnpm build failed despite reporting success #5546 lacks the V8 fatal output.

Top duplicate candidate: none close enough to mark as a duplicate based on the exact job log. #5366 is the nearest related tracker if this later proves to be another manifestation of the same TypeScript SDK build instability, but the current evidence is weaker than a duplicate match.

[bfops]

    ESM ⚡️ Build success in 2292ms

    stderr: 

but also says:

    thread 'smoketests::views::test_typescript_count_view_subscription_refreshes' (81742) panicked at crates/smoketests/tests/smoketests/views.rs:946:10:
    called `Result::unwrap()` on an `Err` value: pnpm build (in "/home/runner/actions-runner/_work/SpacetimeDB/SpacetimeDB/crates/bindings-typescript") failed: