Fix the json parser failure with GCC 4.7

Author: bkabrda

ruby-1.9.3-fix-json-parser.patch

@@ -0,0 +1,40 @@
+diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
+index d1d14c7..1773616 100644
+--- a/ext/json/parser/parser.c
++++ b/ext/json/parser/parser.c
+@@ -1293,6 +1293,7 @@ static VALUE json_string_unescape(VALUE result, char *string, char *stringEnd)
+ {
+     char *p = string, *pe = string, *unescape;
+     int unescape_len;
++    char buf[4];
+ 
+     while (pe < stringEnd) {
+         if (*pe == '\\') {
+@@ -1325,7 +1326,6 @@ static VALUE json_string_unescape(VALUE result, char *string, char *stringEnd)
+                     if (pe > stringEnd - 4) {
+                         return Qnil;
+                     } else {
+-                        char buf[4];
+                         UTF32 ch = unescape_unicode((unsigned char *) ++pe);
+                         pe += 3;
+                         if (UNI_SUR_HIGH_START == (ch & 0xFC00)) {
+diff --git a/ext/json/parser/parser.rl b/ext/json/parser/parser.rl
+index e7d47e1..33e775c 100644
+--- a/ext/json/parser/parser.rl
++++ b/ext/json/parser/parser.rl
+@@ -393,6 +393,7 @@ static VALUE json_string_unescape(VALUE result, char *string, char *stringEnd)
+ {
+     char *p = string, *pe = string, *unescape;
+     int unescape_len;
++    char buf[4];
+ 
+     while (pe < stringEnd) {
+         if (*pe == '\\') {
+@@ -425,7 +426,6 @@ static VALUE json_string_unescape(VALUE result, char *string, char *stringEnd)
+                     if (pe > stringEnd - 4) {
+                         return Qnil;
+                     } else {
+-                        char buf[4];
+                         UTF32 ch = unescape_unicode((unsigned char *) ++pe);
+                         pe += 3;
+                         if (UNI_SUR_HIGH_START == (ch & 0xFC00)) {

ruby.spec

@@ -85,6 +85,9 @@ Patch9: rubygems-1.8.11-binary-extensions.patch
 # Fixes segfaults when build with GCC 4.7.
 # http://bugs.ruby-lang.org/issues/5851
 Patch10: ruby-1.9.3-prevent-optimizing-sp.patch
+# Fixes json encoding failures when build with GCC 4.7.
+# http://bugs.ruby-lang.org/issues/5888
+Patch11: ruby-1.9.3-fix-json-parser.patch
 
 Requires: %{name}-libs%{?_isa} = %{version}-%{release}
 Requires: ruby(rubygems) >= %{rubygems_version}
@@ -285,6 +288,7 @@ Tcl/Tk interface for the object-oriented scripting language Ruby.
 %patch8 -p1
 %patch9 -p1
 %patch10
+%patch11 -p1
 
 %build
 autoconf