diff -r 22652f4020fb -r 540e1940170f src/luan/lib/parser/ParseException.java
--- a/src/luan/lib/parser/ParseException.java	Wed Aug 02 19:00:24 2017 -0600
+++ b/src/luan/lib/parser/ParseException.java	Thu Aug 03 16:21:45 2017 -0600
@@ -48,12 +48,21 @@
 	}
 
 	@Override public String getMessage() {
-		Location loc = new Location(errorIndex);
-		String line = lines()[loc.line];
-		String msg = super.getMessage() +  " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ")\n";
-		StringBuilder sb = new StringBuilder(msg);
+		String line;
+		int pos;
+		StringBuilder sb = new StringBuilder(super.getMessage());
+		if( text.indexOf('\n') == -1 ) {
+			line = text;
+			pos = errorIndex;
+			sb.append( " (position " + (pos+1) + ")\n" );
+		} else {
+			Location loc = new Location(errorIndex);
+			line = lines()[loc.line];
+			pos = loc.pos;
+			sb.append( " (line " + (loc.line+1) + ", pos " + (pos+1) + ")\n" );
+		}
 		sb.append( line + "\n" );
-		for( int i=0; i<loc.pos; i++ ) {
+		for( int i=0; i<pos; i++ ) {
 			sb.append( line.charAt(i)=='\t' ? '\t' : ' ' );
 		}
 		sb.append("^\n");