Index: builtins/alias.c
===================================================================
--- builtins/alias.c	(revision 1547)
+++ builtins/alias.c	(working copy)
@@ -148,6 +148,19 @@
 /* command is a keyword and needs to be handled separately */
 "if [[ \"${cmd}\" == \"command\" ]] ; then\n"
 	"command \"$@\"\n"
+#ifdef WORKAROUND_FOR_ALIAS_CRASH
+/*
+ * Work around a crash in /usr/bin/alias when invalid options are.
+ * passed (e.g. $ /usr/bin/alias -c #). The shell code will call
+ * an error handler which does a |longjmp()| but somehow the code
+ * failed to do the |setjmp()| before this point.
+ * Putting the "alias" command in a subshell avoids the crash.
+ * Real cause of the issue is under investigation and a fix be
+ * delivered with the next ast-ksh update.
+ */
+"elif [[ \"${cmd}\" == \"alias\" ]] ; then\n"
+	"( \"${cmd}\" \"$@\" )\n"
+#endif /* WORKAROUND_FOR_ALIAS_CRASH */
 "else\n"
 	"\"${cmd}\" \"$@\"\n"
 "fi\n"
Index: builtins/Makefile
===================================================================
--- builtins/Makefile	(revision 1547)
+++ builtins/Makefile	(working copy)
@@ -102,6 +102,8 @@
 	$(DTEXTDOM) $(DTS_ERRNO) \
 	-I$(ROOT)/usr/include/ast
 
+CPPFLAGS += -DWORKAROUND_FOR_ALIAS_CRASH=1
+
 CFLAGS += \
 	$(ASTCFLAGS)
 CFLAGS64 += \