fix: only perform argument validation if provided an argument

Author: kgryte

lib/node_modules/@stdlib/repl/lib/commands/rerun.js

@@ -67,21 +67,22 @@ function command( repl ) {
 			return;
 		}
 		nargs = arguments.length;
-		if ( isString( arg ) ) {
-			FLG = 1;
-		} else if ( isNonNegativeInteger( arg ) ) {
-			FLG = 2;
-		} else if ( isRegExp( arg ) ) {
-			FLG = 3;
-		} else if ( isNonNegativeIntegerArray( arg ) ) {
-			FLG = 4;
-		} else {
-			err = new TypeError( format( 'invalid argument. Must provide a string, regular expression, nonnegative integer, or an array of nonnegative integers. Value: `%s`.', arg ) );
-			debug( 'Error: %s', err.message );
-			repl._ostream.write( 'Error: '+err.message+'\n' );
-			return;
+		if ( nargs > 0 ) {
+			if ( isString( arg ) ) {
+				FLG = 1;
+			} else if ( isNonNegativeInteger( arg ) ) {
+				FLG = 2;
+			} else if ( isRegExp( arg ) ) {
+				FLG = 3;
+			} else if ( isNonNegativeIntegerArray( arg ) ) {
+				FLG = 4;
+			} else {
+				err = new TypeError( format( 'invalid argument. Must provide a string, regular expression, nonnegative integer, or an array of nonnegative integers. Value: `%s`.', arg ) );
+				debug( 'Error: %s', err.message );
+				repl._ostream.write( 'Error: '+err.message+'\n' );
+				return;
+			}
 		}
-
 		// Why defer? In order to allow the `rerun()` command to finish before actually evaluating the commands to rerun, thus ensuring that commands are run as if a user manually enters them...
 		repl.once( 'drain', onFinish );