https://git.ruby-lang.org/ruby.git/commit/?id=1034b6e7ba

From 1034b6e7ba9442320e16c260d634d4c64d5e62bf Mon Sep 17 00:00:00 2001
From: NAKAMURA Usaku <usa@r...>
Date: Fri, 31 Dec 2021 19:48:36 +0900
Subject: merge revision(s) 0c5f8c62766afe4605172800063e63fe36996658: [Backport
 #10961]

	[ruby/zlib] Resume zstream if available [Bug #10961]

	---
	 ext/zlib/zlib.c | 6 ++++++
	 1 file changed, 6 insertions(+)
---
 ext/zlib/zlib.c | 6 ++++++
 version.h       | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 5c8aab24af6..3b8e097da9b 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -1066,6 +1066,12 @@ loop: https://github.com/ruby/ruby/blob/trunk/ext/zlib/zlib.c#L1066
                                RB_NOGVL_UBF_ASYNC_SAFE);
 #endif
 
+    /* retry if no exception is thrown */
+    if (err == Z_OK && args.interrupt) {
+       args.interrupt = 0;
+       goto loop;
+    }
+
     if (flush != Z_FINISH && err == Z_BUF_ERROR
 	    && z->stream.avail_out > 0) {
 	z->flags |= ZSTREAM_FLAG_IN_STREAM;
diff --git a/version.h b/version.h
index dc3d5271075..960bec511d2 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L2
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 6
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 208
+#define RUBY_PATCHLEVEL 209
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 12
-- 
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