fix: catch unexpected errors from acorn-loose in REPL tokenizer

PR-URL: #4956
Reviewed-by: Athan Reines <[email protected]>

Author: Snehil-Shah

lib/node_modules/@stdlib/repl/lib/tokenizer.js

@@ -67,11 +67,15 @@ function tokenizer( line, context ) {
 	var i;
 
 	// Parse the given line into tokens & comments...
-	ast = parse( line, {
-		'ecmaVersion': 'latest',
-		'onToken': onToken,
-		'onComment': onComment
-	});
+	try {
+		ast = parse( line, {
+			'ecmaVersion': 'latest',
+			'onToken': onToken,
+			'onComment': onComment
+		});
+	} catch ( error ) { // eslint-disable-line no-unused-vars
+		return tokens;
+	}
 
 	// Resolve variable declarations from the given line as tokens...
 	declarations = resolveLocalScopes( ast );