Update lexer.Consumed() to not overwrite existing error

jlexer/lexer.go

@@ -582,11 +582,11 @@ func (r *Lexer) Consumed() {
 
 	for _, c := range r.Data[r.pos:] {
 		if c != ' ' && c != '\t' && c != '\r' && c != '\n' {
-			r.fatalError = &LexerError{
+			r.addError(&LexerError{
 				Reason: "invalid character '" + string(c) + "' after top-level value",
 				Offset: r.pos,
 				Data:   string(r.Data[r.pos:]),
-			}
+			})
 			return
 		}