22124201 TCSH Latest Patch 126630-03 changes the behavior of Exit . You cannot exit .
Developed in-house but accepted upstream.
--- tcsh-6.18.01/sh.sem.c.orig Sat Oct 31 10:58:21 2015
+++ tcsh-6.18.01/sh.sem.c Sat Oct 31 10:59:42 2015
@@ -212,8 +212,14 @@
* If noexec then this is all we do.
*/
if (t->t_dflg & F_READ) {
+ int old_pintr_disabled;
+
xclose(0);
+ if (setintr)
+ pintr_push_enable(&old_pintr_disabled);
heredoc(t->t_dlef);
+ if (setintr)
+ cleanup_until(&old_pintr_disabled);
if (noexec)
xclose(0);
}