--- a/src/HOL/Mirabelle/lib/scripts/mirabelle.pl Thu Mar 03 22:24:58 2016 +0100
+++ b/src/HOL/Mirabelle/lib/scripts/mirabelle.pl Thu Mar 03 23:33:22 2016 +0100
@@ -159,7 +159,7 @@
my $cmd =
"\"$ENV{'ISABELLE_PROCESS'}\" " .
- "-o quick_and_dirty -e 'Multithreading.max_threads_setmp 1 use_thy \"$path/$new_thy_name\" handle _ => exit 1;' -q $mirabelle_logic" .
+ "-o quick_and_dirty -e 'Multithreading.max_threads_setmp 1 use_thy \"$path/$new_thy_name\"' -q $mirabelle_logic" .
$quiet;
my $result = system "bash", "-c", $cmd;