Print internal errors when precompiler setup or globbing fails

lib/api.js

@@ -51,6 +51,7 @@ class Api extends Emittery {
 	}
 
 	async run(files = [], runtimeOptions = {}) {
+		let setupOrGlobError;
 		files = files.map(file => path.resolve(this.options.resolveTestsFrom, file));
 
 		const apiOptions = this.options;
@@ -106,9 +107,12 @@ class Api extends Emittery {
 			}
 		};
 
+		let precompiler;
+		let helpers;
+
 		try {
-			const precompiler = await this._setupPrecompiler();
-			let helpers = [];
+			precompiler = await this._setupPrecompiler(); // eslint-disable-line require-atomic-updates
+			helpers = [];
 			if (files.length === 0 || precompiler.enabled) {
 				let found;
 				if (precompiler.enabled) {
@@ -122,7 +126,12 @@ class Api extends Emittery {
 					({tests: files} = found);
 				}
 			}
+		} catch (error) {
+			files = [];
+			setupOrGlobError = error;
+		}
 
+		try {
 			if (this.options.parallelRuns) {
 				const {currentIndex, totalRuns} = this.options.parallelRuns;
 				const fileCount = files.length;
@@ -150,6 +159,10 @@ class Api extends Emittery {
 				status: runStatus
 			});
 
+			if (setupOrGlobError) {
+				throw setupOrGlobError;
+			}
+
 			// Bail out early if no files were found.
 			if (files.length === 0) {
 				return runStatus;