Crash de Start_Search

Bonsoir,
Voici les étapes pour reproduire mon problème (Windows 10 64bits) :
alr init --bin dir_search
cd dir_search
Contenu de ./src/dir_search.adb :
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Directories; use Ada.Directories;
procedure Dir_Search is
    ST : Search_Type;
    DE : Directory_Entry_Type;
begin
    Put_Line ("Test en cours...");
    Start_Search (ST, ".", "", (others => True));
    while More_Entries (ST) loop
       Get_Next_Entry  (ST, DE);
       Put_Line ("Found : " & Simple_Name (DE));
    end loop;
    Put_Line ("Done.");
end Dir_Search;
alr run  -> OK
Ajout d'un fichier nommé "Test avec entête.txt" dans ./
alr run  -> !!! Crash !!!
raised ADA.IO_EXCEPTIONS.USE_ERROR : Unable to get modification time of the file ".\Test avec entête.txt"
[Z:\ada\alire_projects\dir_search\bin\dir_search.exe]
0x7ff796b8b983 Ada.Calendar.Arithmetic_Operations.Add at a-direct.adb:877
0x7ff796b8ce8d Ada.Calendar.Arithmetic_Operations.Add at a-direct.adb:1454
0x7ff796b8d224 Ada.Calendar.Arithmetic_Operations.Add at a-direct.adb:1264
0x7ff796be05a1 Dir_Search at dir_search.adb:10
0x7ff796be0dec Dir_Search at b__dir_search.adb:303
0x7ff796b8143c __tmainCRTStartup at ???
0x7ff796b81144 mainCRTStartup at ???
[C:\WINDOWS\System32\KERNEL32.DLL]
0x7ffcd5077342
[C:\WINDOWS\SYSTEM32\ntdll.dll]
0x7ffcd5c026af
Bug dans la runtime ?
Nicolas