[t/spec] tests for RT #75956, @*INC should be writable

git-svn-id: http://svn.pugscode.org/pugs@31484 c213334d-75ef-0310-aa23-eaa082d1ae64

S28-named-variables/inc.t

@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 3;
+plan 5;
 
 # Note that @*INC is only provisional until we have plans for a "real"
 # module database in place.
@@ -18,4 +18,7 @@ is(+@*INC, $number_in_inc + 1, 'we added something to @INC');
 pop @*INC;
 is(+@*INC, $number_in_inc, 'we removed something from @INC');
 
+lives_ok { @*INC = <a b c> }, 'Can assign to @*INC';
+is @*INC.join(','), 'a,b,c', '... and assignment worked';
+
 # vim: ft=perl6