From e2b59201d5049a8ad509b280e729a871756abc99 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Tue, 11 Jun 2019 15:48:26 +0200
Subject: [PATCH] Issue 105: Fix NULL dereferencing in regexp compiler.

"x(?:)" parses to Cat(Char(x), Empty), but the compiler couldn't handle
an empty right hand side of the Cat node.
---
 regexp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/regexp.c b/regexp.c
index 3f800e3..01e1aa0 100644
--- a/regexp.c
+++ b/regexp.c
@@ -637,10 +637,10 @@ static void compile(Reprog *prog, Renode *node)
 	Reinst *inst, *split, *jump;
 	int i;
 
+loop:
 	if (!node)
 		return;
 
-loop:
 	switch (node->type) {
 	case P_CAT:
 		compile(prog, node->x);