From 27f1f2c2ab804f56b2ae8adcc94e4b78896381aa Mon Sep 17 00:00:00 2001
From: Pompolic <pompolic@special-circumstanc.es>
Date: Wed, 29 Apr 2020 18:03:20 +0200
Subject: [PATCH] Crash fix for !9
---
pdf.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/pdf.c b/pdf.c
index d649711..0ca6394 100644
--- a/pdf.c
+++ b/pdf.c
@@ -741,7 +741,7 @@ act_xrstm(const HParseResult *p, void *u)
dict = H_INDEX_TOKEN(p->ast, 1, 0);
res = H_FIELD(HParseResult, 1, 1); // XXX free this
- xrefs = res->ast;
+ xrefs = res ? res->ast : NULL;
tok = H_MAKE_SEQN(2);
tok->seq->elements[0] = (HParsedToken *)xrefs;
@@ -758,9 +758,16 @@ act_xrstm(const HParseResult *p, void *u)
bool
validate_xrstm(HParseResult *p, void *u)
{
+ const HParsedToken *xrefs = H_INDEX_TOKEN(p->ast, 1, 1);
const Dict *tdict = H_FIELD(Dict, 1, 0);
const HParsedToken *v = dictentry(tdict, "Type");
+ if (!xrefs)
+ {
+ fprintf(stderr, "XRef table missing or corrupt!");
+ return false;
+ }
+
#if 0
if (v == NULL)
fprintf(stderr, "stream dict has no /Type\n");
--
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