[SR-2656] Linux Swift 3.0 crashes in DispatchIO.read()

[swift-ci]

Previous ID	SR-2656
Radar	None
Original Reporter	helge (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Environment

Ubuntu, either 14 or 15, doesn't matter with the final Swift 3.0 drop.

Additional Detail from JIRA

Votes	0
Component/s	libdispatch
Labels	Bug, Linux
Assignee	dgrove-oss (JIRA)
Priority	Medium

md5: 11d534504ba248a72e773044ac6867ff

Issue Description:

Swift 3.0: read()ing from a DispatchIO channel on Linux results in a SIGILL:

• thread Add & use DISPATCH_NOESCAPE attribute macro #6: tid = 1146, 0x00007ffff7efb503 libdispatch.so`_os_object_release + 35, name = 'sockd', stop reason = signal SIGILL: illegal instruction operand

• frame #0: 0x00007ffff7efb503 libdispatch.so`_os_object_release + 35
  frame Typos #1: 0x00007ffff7ef46b7 libdispatch.so`_dispatch_call_block_and_release + 7

I put up an tiny isolated example over here: https://github.com/helje5/linux-gcd-issue

Works fine on macOS.

[swift-ci]

Comment by David Grove (JIRA)

I can reproduce crash. Investigating.

[swift-ci]

Comment by David Grove (JIRA)

A proposed fix in #175

[swift-ci]

Comment by Helge Heß (JIRA)

That was Swift. Thx.

[swift-ci]

Comment by David Grove (JIRA)

fixed merged to master; will be merged to Swift3 branch shortly.