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cc1: Disable longjmp()

We do not set the recovery points at this moment,
and it means that executing the longjmp() of
discard() will surely generate a segmentation
fault. This patch disables the call to longjmp()
with an exit() until we fix the recovery problem.

--- a/src/cmd/cc/cc1/lex.c

+++ b/src/cmd/cc/cc1/lex.c

@@ -852,5 +852,14 @@

 	}

 jump:

 	yytoken = c;

+	exit(EXIT_FAILURE);

+

+	/*

+	 * FIXME: We don't have a proper recover mechanism at this moment

+	 * and we don't set the recover point ever, so executing this

+	 * longjmp will generate surely a segmentation fault, so it does

+	 * not make sense to do it. We just exit until we can find time

+	 * to solve this problem.

+	 */

 	longjmp(recover, 1);

 }