LilyPond dies silently if file starts with UTF-8 character

[Mats Bengtsson]

Hi,

By mistake, I happened to insert a character like "é" at the top level of a
.ly file and to my surprise, LilyPond dies silently with

GNU LilyPond 2.9.28
Processing `/tmp/a.ly'
Parsing...

and the exit code is zero. In contrast, if I add a stray ASCII character 
at the top level
of a file, I get a syntax error. The same problem happens both in the 
latest 2.9.x and
in 2.8.

Example:

\version "2.9.28"
é
\relative c'{
c d e f
}

  /Mats