Don't use non blocking pipes for RUBY_CRASH_REPORT

[Bug #21703]

RUBY_CRASH_REPORT does not work in some cases when shelling out on Linux.
For example, given the following shell script dump.sh:

    #!/usr/bin/env bash
    cat > /tmp/crash

And we see it fails like this:

    $ RUBY_CRASH_REPORT="|dump.sh" ruby -rfiddle -e "Fiddle::Pointer.new(1, 10)[0]"
    cat: -: Resource temporarily unavailable

Author: peterzhu2118

io.c

@@ -8079,7 +8079,12 @@ ruby_popen_writer(char *const *argv, rb_pid_t *pid)
     int write_pair[2];
 # endif
 
-    int result = rb_cloexec_pipe(write_pair);
+#ifdef HAVE_PIPE2
+    int result = pipe2(write_pair, O_CLOEXEC);
+#else
+    int result = pipe(write_pair);
+#endif
+
     *pid = -1;
     if (result == 0) {
 # ifdef HAVE_WORKING_FORK

test/ruby/test_rubyoptions.rb

@@ -954,6 +954,27 @@ def test_crash_report_pipe
     end
   end
 
+  def test_crash_report_pipe_script
+    omit "only runs on Linux" unless RUBY_PLATFORM.include?("linux")
+
+    Tempfile.create(["script", ".sh"]) do |script|
+      Tempfile.create("crash_report") do |crash_report|
+        script.write(<<~BASH)
+          #!/usr/bin/env bash
+
+          cat > #{crash_report.path}
+        BASH
+        script.close
+
+        FileUtils.chmod("+x", script)
+
+        assert_crash_report("| #{script.path}") do
+          assert_include(File.read(crash_report.path), "[BUG] Segmentation fault at")
+        end
+      end
+    end
+  end
+
   def test_DATA
     Tempfile.create(["test_ruby_test_rubyoption", ".rb"]) {|t|
       t.puts "puts DATA.read.inspect"