[SR-16103] expectCrashLater(withMessage:) doesn't work correctly on Linux CI

[glessard]

Previous ID	SR-16103
Radar	rdar://91365967
Original Reporter	@glessard
Type	Bug

Attachment: Download

Environment

I was unable to build for Linux on my machine today, so I have nothing more precise than "the CI environment".

Additional Detail from JIRA

Votes	0
Component/s	swift
Labels	Bug
Assignee	None
Priority	Medium

md5: bf124e4f079ec0d2ed8bad960d970880

Issue Description:

The following test file (tested in the test/ hierarchy) fails on the current Linux CI:

// RUN: %target-run-simple-swift
// REQUIRES: executable_test


import StdlibUnittest


var CrashTest = TestSuite("CrashTest")


CrashTest.test("expectCrashLater(withMessage:)") {
  var i: Int? = nil
  expectCrashLater(withMessage: "Unexpectedly found nil while unwrapping an Optional value")
  _ = i!
  expectUnreachable()
  i = 0
}


runAllTests()

The same works as expected on macOS and Windows CI.

I was forced to work around this in 8032a7c

[glessard]

This test is in a ready-to-fail PR: #42207

[glessard]

expectCrashLater(withMessage: String) also fails with a non-empty argument on a) iOS simulators and b) some conditions of the long test on macOS.