[Swift CI] Build Failure: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (master) #3133


[FAILURE] oss-swift-incremental-RA-linux-ubuntu-16_04 [#3133]

Build URL:
Date of build:
Mon, 12 Mar 2018 23:55:21 -0500
Build duration:
1 hr 35 min

Identified problems:

  • Timeout: This build was marked as FAIL because it timed out.


  • Commit 0223daec0fc63d98f88370e3d0e8f68713126337 by spestov:
    stdlib: ClosedRange.Index should be fixed-layout

    • edit: stdlib/public/core/ClosedRange.swift
  • Commit de4f1f8a663c4181ab386b296993629e63660a6c by spestov:
    Re-enable resilience for stdlib and overlays

    • edit: utils/build-script-impl

Build timed out (after 45 minutes). Marking the build as failed.
This hasn’t occurred in any subsequent builds.


Around the time of the recent LLVM merge we’ve started seeing sporadic timeouts on a couple of the stdlib tests. I don’t think it was related to resilience (it was also re-enabled at around the same time) but I could be wrong. In any case I haven’t been able to reproduce it locally. Could be a miscompile in LLVM or SIL optimizer, or we’re relying on some UB that newer LLVM optimizes differently?


If you see this failing anywhere else, please make a note in this radar:

rdar://problem/38430428 Swift CI: 0. OSS - Swift Incremental RA - Ubuntu 16.04 (master) - build timeout
That might help narrow down the problem.