non-greedy regexp don't seem to work

[Michael Gerdau]

Hi list,

the following two statements should provide the exakt same strings:
(match:substring (string-match "_(.*?)_" "a_ä_ö_de_fü_") 1)
(match:substring (string-match "_([^_]*)_" "a_ä_ö_de_fü_") 1)

However for me they don't. Here is a log how I tested it:
$ guile
GNU Guile 2.0.11                                                                
                                                          
Copyright (C) 1995-2014 Free Software Foundation, Inc.                          
                                                          
                                                                                
                                                          
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> (match:substring (string-match "_(.*?)_" 
"a_ä_ö_de_fü_") 1)
$1 = "ä_ö_de_fü"
scheme@(guile-user)> (match:substring (string-match "_([^_]*)_" 
"a_ä_ö_de_fü_") 1)
$2 = "ä"
scheme@(guile-user)> ,q

I checked the same regexps in Perl and there both results are the same.

Am I overlooking the obvious or is this a bug ?

Best wishes,
Michael
-- 
 Michael Gerdau       email: address@hidden
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