[pcre] Fix repeated forward reference

[Petr Pisar]

commit b41a1da88c1eceeb863d55ba8427f50b203fcf7e
Author: Petr Písař <ppisar at redhat.com>
Date:   Tue Nov 22 16:38:38 2011 +0100

    Fix repeated forward reference

 pcre-8.20-forward_reference.patch |   69 +++++++++++++++++++++++++++++++++++++
 pcre.spec                         |    8 ++++-
 2 files changed, 76 insertions(+), 1 deletions(-)
---
diff --git a/pcre-8.20-forward_reference.patch b/pcre-8.20-forward_reference.patch
new file mode 100644
index 0000000..f01d23a
--- /dev/null
+++ b/pcre-8.20-forward_reference.patch
@@ -0,0 +1,69 @@
+Fix repeated forward reference needed character bug
+
+From:
+r762 | ph10 | 2011-11-22 14:36:51 +0100 (Út, 22 lis 2011) | 2 lines
+
+16. A repeated forward reference in a pattern such as (a)(?2){2}(.) was
+    incorrectly expecting the subject to contain another "a" after the start.
+
+Petr Pisar: Changelog removed.
+See <http://lists.pcre.org/lurker/message/20111121.203922.3cfd476e.en.html>.
+
+
+Index: testdata/testoutput11
+===================================================================
+--- testdata/testoutput11	(revision 761)
++++ testdata/testoutput11	(revision 762)
+@@ -1441,4 +1441,10 @@
+     xabcd 
+  0: c
+ 
++/(a)(?2){2}(.)/
++    abcd
++ 0: abcd
++ 1: a
++ 2: d
++
+ /-- End of testinput11 --/
+Index: testdata/testinput11
+===================================================================
+--- testdata/testinput11	(revision 761)
++++ testdata/testinput11	(revision 762)
+@@ -800,4 +800,7 @@
+ /(?<=a(*THEN)b)c/
+     xabcd 
+ 
++/(a)(?2){2}(.)/
++    abcd
++
+ /-- End of testinput11 --/
+Index: pcre_compile.c
+===================================================================
+--- pcre_compile.c	(revision 761)
++++ pcre_compile.c	(revision 762)
+@@ -4884,7 +4884,8 @@
+             *lengthptr += delta;
+             }
+ 
+-          /* This is compiling for real */
++          /* This is compiling for real. If there is a set first byte for
++          the group, and we have not yet set a "required byte", set it. */
+ 
+           else
+             {
+@@ -6015,11 +6016,14 @@
+               }
+             }
+ 
+-          /* Insert the recursion/subroutine item. */
++          /* Insert the recursion/subroutine item. It does not have a set first
++          byte (relevant if it is repeated, because it will then be wrapped 
++          with ONCE brackets). */
+ 
+           *code = OP_RECURSE;
+           PUT(code, 1, (int)(called - cd->start_code));
+           code += 1 + LINK_SIZE;
++          groupsetfirstbyte = FALSE; 
+           }
+ 
+         /* Can't determine a first byte now */
diff --git a/pcre.spec b/pcre.spec
index e41221c..3e6a9d3 100644
--- a/pcre.spec
+++ b/pcre.spec
@@ -1,7 +1,7 @@
 # This is stable release: %%global rcversion RC3
 Name: pcre
 Version: 8.20
-Release: %{?rcversion:0.}4%{?rcversion:.%rcversion}%{?dist}
+Release: %{?rcversion:0.}5%{?rcversion:.%rcversion}%{?dist}
 %global myversion %{version}%{?rcversion:-%rcversion}
 Summary: Perl-compatible regular expression library
 Group: System Environment/Libraries
@@ -15,6 +15,8 @@ Patch1: pcre-8.20-refused_spelling_terminated.patch
 Patch2: pcre-8.20-lookbehind.patch
 # Fix other look-behind regression, in upstream after 8.20.
 Patch3: pcre-8.20-lookbehind-2.patch
+# Fix repeated forward reference, in upstream after 8.20.
+Patch4: pcre-8.20-forward_reference.patch
 BuildRequires: readline-devel
 # New libtool to get rid of rpath
 BuildRequires: autoconf, automake, libtool
@@ -57,6 +59,7 @@ libtoolize --copy --force && autoreconf
 %patch1 -p1 -b .terminated_typos
 %patch2 -p1 -b .lookbehind
 %patch3 -p1 -b .lookbehind3
+%patch4 -p0 -b .forward_reference
 # One contributor's name is non-UTF-8
 for F in ChangeLog; do
     iconv -f latin1 -t utf8 "$F" >"${F}.utf8"
@@ -127,6 +130,9 @@ make check
 %{_mandir}/man1/pcretest.*
 
 %changelog
+* Tue Nov 22 2011 Petr Pisar <ppisar at redhat.com> - 8.20-5
+- Fix repeated forward reference (bug #755969)
+
 * Wed Nov 16 2011 Petr Pisar <ppisar at redhat.com> - 8.20-4
 - Fix other look-behind regressions