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Unhandled promise rejections during build cause hangs instead of proper error exits

Unhandled promise rejections during build cause hangs instead of proper error exits: a task in LegoFlow-SWE (Harbor dataset). Observed behavior When a build encounters an error (e.g., app.import referencing a missing file) in recent versions of ember-cli (≥ 3.15, or with EMBER CLI BROCCOLI…

The task

**Observed behavior** When a build encounters an error (e.g., `app.import` referencing a missing file) in recent versions of ember-cli (≥ 3.15, or with `EMBER_CLI_BROCCOLI_WATCHER=true`), the build does not exit with a clear error message and stack trace. Instead it hangs indefinitely, only printing an…

Part of Lego-X/LegoFlow-SWE.