Issue #15387 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.4: REQUIRED, 2.5: REQUIRED to 2.4: REQUIRED, 2.5: DONE

ruby_2_5 r66876 merged revision(s) 66242.

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Bug #15387: Backport r66242 (io.c (io_write_nonblock): add RB_GC_GUARD, io_fflush may switch threads)
https://bugs.ruby-lang.org/issues/15387#change-76418

* Author: nagachika (Tomoyuki Chikanaga)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.4: REQUIRED, 2.5: DONE
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This is a ticket for backport management.




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