Test Failure: Debugging - lldb-dap and CodeLLDB tests flaky on Linux (6.0 - jammy) and Linux (nightly-main)

[rbenegal]

Failure logs

  Test Explorer Suite
    Debugging
      lldb-dap
        1) Debugs specified XCTest test
Captured logs during Test Explorer Suite → Debugging → lldb-dap → Debugs specified XCTest test:
Starting test: Test Explorer Suite → Debugging → lldb-dap → Debugs specified XCTest test
00:32:28: Exec Task: (test/defaultPackage) swift build --build-tests -Xswiftc -diagnostic-style=llvm -Xswiftc -DTEST_ARGUMENT_SET_VIA_TEST_BUILD_ARGUMENTS_SETTING
00:32:33: test/defaultPackage: Start Test Debugging
======== END OF LOGS ========

Link to failed run:
Linux 6.0 - jammy - https://github.com/swiftlang/vscode-swift/actions/runs/13742923214/job/38434315893
Linux - nightly main - jammy - https://github.com/swiftlang/vscode-swift/actions/runs/13711032779/job/38347420220

      lldb-dap
        ✔ Debugs specified XCTest test (7308ms)
        1) Debugs specified swift-testing test
Captured logs during Test Explorer Suite → Debugging → lldb-dap → Debugs specified swift-testing test:
Starting test: Test Explorer Suite → Debugging → lldb-dap → Debugs specified swift-testing test
00:32:20: Exec Task: (test/defaultPackage) swift build --build-tests -Xswiftc -diagnostic-style=llvm -Xswiftc -DTEST_ARGUMENT_SET_VIA_TEST_BUILD_ARGUMENTS_SETTING
00:32:21: test/defaultPackage: Exec: mkfifo /tmp/vscodemkfifo-1741480341087
00:32:21: test/defaultPackage: Start Test Debugging

Link to failed runs:
Linux - nightly-main - jammy - https://github.com/swiftlang/vscode-swift/actions/runs/13742923214/job/38434315893
Linux - nightly-main - jammy - https://github.com/swiftlang/vscode-swift/actions/runs/13742923214/job/38434316076

  Test Explorer Suite
    Debugging
      lldb-dap
        ✔ Debugs specified XCTest test (7291ms)
        ✔ Debugs specified swift-testing test
      CodeLLDB
        1) Debugs specified XCTest test @slow
Captured logs during Test Explorer Suite → Debugging → CodeLLDB → Debugs specified XCTest test @slow:
Starting test: Test Explorer Suite → Debugging → CodeLLDB → Debugs specified XCTest test @slow
00:29:24: Exec Task: (test/defaultPackage) swift build --build-tests -Xswiftc -diagnostic-style=llvm -Xswiftc -DTEST_ARGUMENT_SET_VIA_TEST_BUILD_ARGUMENTS_SETTING
00:29:25: test/defaultPackage: Start Test Debugging

Linux nightly-main - jammy - https://github.com/swiftlang/vscode-swift/actions/runs/13731781310/job/38410071631

Additional context
Seems like only one of the tests fail at a given time, but not all a the same time.

[rbenegal]

Still failing randomly on the nightlies - for example on https://github.com/swiftlang/vscode-swift/actions/runs/15009530681/job/42175706833 on Linux 6.1 insiders:

  1) Test Explorer Suite
       Debugging
         lldb-dap
           Debugs specified XCTest test:
     Error: Timeout of 300000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/tmp/code/dist/test/integration-tests/testexplorer/TestExplorerIntegration.test.js)
      at listOnTimeout (node:internal/timers:594:17)
      at processTimers (node:internal/timers:529:7)

[award999]

Think I've stabilized these

[plemarquand]

Verified with a5d7037