https://ci.chromium.org/buildbot/chromium.fyi/ios-simulator-cronet/

[I 2018-03-20 05:46:01] About to install Xcode 9c40b in Xcode.app for ios
iossim: ERROR: Unable to find a device iPhone 5s with SDK 11.0.
iOS devices:
iPhone 4s
iPhone 5
iPhone 5s
iPhone 6
iPhone 6 Plus
iPhone 6s
iPhone 6s Plus
iPhone 7
iPhone 7 Plus
iPhone 8
iPhone 8 Plus
iPhone SE
iPhone X
iPad 2
iPad Retina
iPad Air
iPad Air 2
iPad (5th generation)
iPad Pro (9.7-inch)
iPad Pro (12.9-inch)
iPad Pro (12.9-inch) (2nd generation)
iPad Pro (10.5-inch)
runtimes:
9.0
9.3
10.0
10.3.1
11.2
Using Xcode version 9.2 build 9C40b at /b/s/w/ir/Xcode.app/Contents/Developer
Traceback (most recent call last):
  File "src/ios/build/bots/scripts/run.py", line 228, in <module>
    sys.exit(main())
  File "src/ios/build/bots/scripts/run.py", line 73, in main
    return 0 if tr.launch() else 1
  File "/b/s/w/ir/src/ios/build/bots/scripts/test_runner.py", line 488, in launch
    self.set_up()
  File "/b/s/w/ir/src/ios/build/bots/scripts/test_runner.py", line 686, in set_up
    self.wipe_simulator()
  File "/b/s/w/ir/src/ios/build/bots/scripts/test_runner.py", line 671, in wipe_simulator
    '-w',
  File "/b/s/w/ir/.swarming_module/lib/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/b/s/w/ir/src/out/Debug-iphonesimulator/iossim', '-d', 'iPhone 5s', '-s', '11.0', '-w']' returned non-zero exit status 2