A file the REPL was asked to preload would not compile.

Separate from the run pipeline's bundle error because the consequence differs: a run has nothing to do without its bundle, while a REPL could in principle still open. It does not — a prompt whose import silently did not happen is worse than one that refuses to start.

import { PreloadBuildFailed } from './session.ts';

const failure = PreloadBuildFailed({ detail: 'test/helpers.ts:3:8: ERROR: Expected ")"' });
failure.data.detail.includes('ERROR'); // true — esbuild's own message, verbatim