Bug #17262: Backport encoding fixes

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.5: REQUIRED, 2.6: REQUIRED, 2.7: REQUIRED

[nobu (Nobuyoshi Nakada)]

Please backport following fixes for Encoding.

• 5f7be6243a5b support multi-run for test/ruby/test_encoding.rb
• 921916ff9e29 Isolate the test for Encoding#replicate
• 52cdf400efae Workaround of instance variable on hidden object
• bdf3032e3542 Make temporary lock string encoding free
• 160d3165eb09 Copy non-inlined encoding index
• fce667ed08f2 Get rid of warnings/exceptions at cleanup
• 7ffd14a18c34 Check encoding name to replicate

Attaching the patch to backport the last one to 2.7.

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)