merge revision(s) cf831f49189c4a890da6845e39199a5dfaf4fb48,3260602fa3d905ba310b9afbc5365ee52cb53d62:

	zlib: fix Gzip{Writer,Reader}.new fails with a O_TMPFILE file

	---
	 ext/zlib/zlib.c        | 18 ++++++++++++++----
	 test/zlib/test_zlib.rb | 21 +++++++++++++++++++++
	 2 files changed, 35 insertions(+), 4 deletions(-)

	Adjusted indents [ci skip]

	---
	 ext/zlib/zlib.c | 10 +++++-----
	 1 file changed, 5 insertions(+), 5 deletions(-)

1 files changed, 14 insertions, 4 deletions

diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 7b74a40860..fdf92e29f1 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -3520,6 +3520,16 @@ rb_gzfile_path(VALUE obj)
     return gz->path;
 }
 
+static VALUE
+gzfile_initialize_path_partial(VALUE obj)
+{
+    struct gzfile* gz;
+    TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
+    gz->path = rb_funcall(gz->io, id_path, 0);
+    rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
+    return Qnil;
+}
+
 static void
 rb_gzfile_ecopts(struct gzfile *gz, VALUE opts)
 {
@@ -3628,8 +3638,8 @@ rb_gzwriter_initialize(int argc, VALUE *argv, VALUE obj)
     rb_gzfile_ecopts(gz, opt);
 
     if (rb_respond_to(io, id_path)) {
-	gz->path = rb_funcall(gz->io, id_path, 0);
-	rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
+	/* File#path may raise IOError in case when a path is unavailable */
+	rb_rescue2(gzfile_initialize_path_partial, obj, NULL, Qnil, rb_eIOError, (VALUE)0);
     }
 
     return obj;
@@ -3890,8 +3900,8 @@ rb_gzreader_initialize(int argc, VALUE *argv, VALUE obj)
     rb_gzfile_ecopts(gz, opt);
 
     if (rb_respond_to(io, id_path)) {
-	gz->path = rb_funcall(gz->io, id_path, 0);
-	rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
+	/* File#path may raise IOError in case when a path is unavailable */
+	rb_rescue2(gzfile_initialize_path_partial, obj, NULL, Qnil, rb_eIOError, (VALUE)0);
     }
 
     return obj;