From 5df6082786ac12d5e5dddfa326ca9544cd4913bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Rodr=C3=ADguez?= <deivid.rodriguez@riseup.net>
Date: Sun, 5 Apr 2020 15:31:10 +0200
Subject: [PATCH] [rubygems/rubygems] Improve gzip errors logging

By default, the `Zlib::GzipFile::Error` does not include the actual data
that was not in gzip format that caused the error.

However, its `#inspect` method includes it.

I think this can be helpful to troubleshoot errors.

https://github.com/rubygems/rubygems/commit/11c8717133
---
 lib/rubygems/util.rb | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/rubygems/util.rb b/lib/rubygems/util.rb
index 196cbe0645..dcd7fc2b47 100644
--- a/lib/rubygems/util.rb
+++ b/lib/rubygems/util.rb
@@ -11,7 +11,13 @@ module Gem::Util
     require 'stringio'
     data = StringIO.new(data, 'r')
 
-    unzipped = Zlib::GzipReader.new(data).read
+    gzip_reader = begin
+                    Zlib::GzipReader.new(data)
+                  rescue Zlib::GzipFile::Error => e
+                    raise e.class, e.inspect, e.backtrace
+                  end
+
+    unzipped = gzip_reader.read
     unzipped.force_encoding Encoding::BINARY
     unzipped
   end