ruby-core

Issue #12509 has been updated by Nobuyoshi Nakada.


Or a patch for stable sort.

```diff
diff --git i/lib/rexml/xpath_parser.rb w/lib/rexml/xpath_parser.rb
index 181b2b6..7ae6495 100644
--- i/lib/rexml/xpath_parser.rb
+++ w/lib/rexml/xpath_parser.rb
@@ -503,9 +503,9 @@
           node_idx << np.parent.index( np )
           np = np.parent
         end
-        new_arry << [ node_idx.reverse, node ]
+        new_arry << [ node_idx.reverse, new_arry.size, node ]
       }
-      new_arry.sort{ |s1, s2| s1[0] <=> s2[0] }.collect{ |s| s[1] }
+      new_arry.sort.collect(&:last)
     end
 
 
diff --git i/lib/rss/maker/base.rb w/lib/rss/maker/base.rb
index bc4ca84..8c00375 100644
--- i/lib/rss/maker/base.rb
+++ w/lib/rss/maker/base.rb
@@ -690,13 +690,15 @@
       private
       def sort_if_need
         if @do_sort.respond_to?(:call)
-          @items.sort do |x, y|
-            @do_sort.call(x, y)
-          end
+          @items.map.with_index.sort do |(x, xi), (y, yi)|
+            c = @do_sort.call(x, y)
+            c == 0 ? xi <=> yi : c
+          end.map(&:first)
         elsif @do_sort
-          @items.sort do |x, y|
-            y <=> x
-          end
+          @items.map.with_index.sort do |(x, xi), (y, yi)|
+            c = y <=> x
+            c == 0 ? xi <=> yi : c
+          end.map(&:first)
         else
           @items
         end
```

----------------------------------------
Bug #12509: Using qsort_s in mingw-w64 causes failures
https://bugs.ruby-lang.org/issues/12509#change-60878

* Author: Tsuyoshi Morita
* Status: Closed
* Priority: Normal
* Assignee: Nobuyoshi Nakada
* ruby -v: ruby 2.4.0dev (2016-09-14 trunk 56160) [x64-mingw32]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
I got failures related to 'qsort_s'.
The following failures will disappear when I delete AC_CHECK_FUNCS(qsort_s) code in configure.

~~~
  1) Failure:
REXMLTests::TestXPathText#test_ancestors [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rexml/xpath/test_text.rb:72]:
Failed assertion, no message given.

  2) Failure:
RSS::TestMaker09#test_items [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_0.9.rb:336]:
<"TITLE0"> expected but was
<"TITLE1">.

  3) Failure:
RSS::TestMaker09#test_items_with_new_api_since_018 [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_0.9.rb:336]:
<"TITLE0"> expected but was
<"TITLE1">.

  4) Failure:
RSS::TestMaker10#test_items [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_1.0.rb:288]:
<"http://hoge.com/0"> expected but was
<"http://hoge.com/1">.

  5) Failure:
RSS::TestMaker10#test_items_with_new_api_since_018 [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_1.0.rb:288]:
<"http://hoge.com/0"> expected but was
<"http://hoge.com/1">.

  6) Failure:
RSS::TestMaker20#test_items [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_2.0.rb:400]:
<"TITLE0"> expected but was
<"TITLE1">.

  7) Failure:
RSS::TestMaker20#test_items_with_new_api_since_018 [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rss/test_maker_2.0.rb:400]:
<"TITLE0"> expected but was
<"TITLE1">.

  8) Failure:
TestArray#test_sort_bang_with_freeze [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/ruby/test_array.rb:1470]:
frozen during comparison.
[RuntimeError] exception expected, not.
Class: <ArgumentError>
Message: <"comparison of Object with Object failed">
---Backtrace---
C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/ruby/test_array.rb:1470:in `sort!'
C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/ruby/test_array.rb:1470:in `block in test_sort_bang_with_freeze'
C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/lib/test/unit/assertions.rb:74:in `assert_raise'
C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/ruby/test_array.rb:1470:in `test_sort_bang_with_freeze'
C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/lib/test/unit.rb:1027:in `run_test'
---------------

  9) Failure:
TestGemRequestSetLockfile#test_to_s_gem_dependency_non_default [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rubygems/test_gem_request_set_lockfile.rb:239]:
--- expected
+++ actual
@@ -10,5 +10,5 @@
 
 DEPENDENCIES
   a
-  b
+  b (>= 1)
 "


 10) Failure:
TestGemResolver#test_raises_dependency_error [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rubygems/test_gem_resolver.rb:425]:
--- expected
+++ actual
@@ -1,2 +1,2 @@
-[Gem::Dependency.new("c", Gem::Requirement.new(["= 2"]), :runtime),
- Gem::Dependency.new("c", Gem::Requirement.new(["= 1"]), :runtime)]
+[Gem::Dependency.new("c", Gem::Requirement.new(["= 1"]), :runtime),
+ Gem::Dependency.new("c", Gem::Requirement.new(["= 2"]), :runtime)]


 11) Failure:
TestGemResolver#test_raises_when_possibles_are_exhausted [C:/msys64/home/tsuyoshi/ruby-2.4.0-preview1/test/rubygems/test_gem_resolver.rb:524]:
Expected: "c-2"
  Actual: "c-1"

~~~
$ gcc -v
Using built-in specs.
COLLECT_GCC=C:\msys64\mingw64\bin\gcc.exe
COLLECT_LTO_WRAPPER=C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/5.4.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-5.4.0/configure --prefix=/mingw64 --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include --libexecdir=/mingw64/lib --with-gxx-include-dir=/mingw64/include/c++/5.4.0 --enable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynamic-string --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --enable-version-specific-runtime-libs --disable-isl-version-check --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 --with-pkgversion='R
 ev1, Built by MSYS2 project' --with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as --with-gnu-ld
Thread model: posix
gcc version 5.4.0 (Rev1, Built by MSYS2 project)




---Files--------------------------------
configure.in.patch (393 Bytes)


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