GetException

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Return the underlying exception, or fail with invariant violation

public function getException(): Exception;

• if the operation succeeded: fails with invariant violation
• if the operation failed: returns the exception indicating failure

Returns

• Exception - The exception that the Awaitable threw upon failure, or an InvariantException if there is no exception (i.e., because the Awaitable succeeded).