Add test case from Paul Eggert.

diff --git a/tests/sort/Test.pm b/tests/sort/Test.pm
index 21c74b1640ec77d25d1585463239c55e210ea63d..965184ec5e86f4f5bac152e998f12851bdb57d41 100755 (executable)
--- a/tests/sort/Test.pm
+++ b/tests/sort/Test.pm
@@ -206,6 +206,11 @@ my @tv = (
 # From Paul Eggert.  This was fixed in textutils-1.22k.
 ["neg-nls", '-n', "-1\n-9\n", "-9\n-1\n", 0],
 
+# From Paul Eggert.  This was fixed in textutils-1.22m.
+# The bug was visible only when using the internationalized sorting code
+# (i.e., not when configured with --disable-nls).
+["nul-nls", '', "\0b\n\0a\n", "\0a\n\0b\n", 0],
+
 );
 
 sub test_vector