From: Tobias Geerinckx-Rice <me@tobias.gr>
Date: Thu, 01 Aug 2019 21:12:52 +0200
Subject: [PATCH] gnu: pcre2: Fix jit_match crash.

Fixes <https://bugs.exim.org/show_bug.cgi?id=2421>, reported as a ‘secrity
problem’.

Copied verbatim from upstream[0].

[0]: https://vcs.pcre.org/pcre2/code/trunk/src/pcre2_jit_compile.c?view=patch&r1=1089&r2=1092&pathrev=1092

--- trunk/src/pcre2_jit_compile.c	2019/05/10 13:15:20	1089
+++ trunk/src/pcre2_jit_compile.c	2019/05/13 16:38:18	1092
@@ -8571,7 +8571,10 @@
 PCRE2_SPTR bptr;
 uint32_t c;
 
-GETCHARINC(c, cc);
+/* Patch by PH */
+/* GETCHARINC(c, cc); */
+
+c = *cc++;
 #if PCRE2_CODE_UNIT_WIDTH == 32
 if (c >= 0x110000)
   return NULL;