the linux PR smoke tests appear to currently be failing on... something possibly related to 'PluginTests' and/or the package manager. from the ones i've looked at, the errors look like they started sometime yesterday (this build appears to be the first one exhibiting the issue) and have affected most (all?) jobs since.
can anyone make sense of the error logs and/or have any ideas how to possibly resolve or work around them?
excerpted log output
16:50:16 ✘ Suite PluginTests failed after 201.362 seconds with 8 issues (including 7 known issues).
16:50:16 ✘ Test run with 401 tests in 80 suites failed after 201.363 seconds with 39 issues (including 37 known issues).
16:50:16 --- bootstrap | 2025-06-18 21:50:15,807 | DEBUG | MainThread | helpers | call | Line:72 | executing command >>> ['env', 'SWIFTCI_USE_LOCAL_DEPS=1', 'SWIFTPM_MACOS_DEPLOYMENT_TARGET=12.0', 'LD_LIBRARY_PATH=/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/bootstrap/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/tsc/lib:/home/build-user/build/buildbot_linux/llbuild-linux-x86_64/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-argument-parser/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-crypto/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-driver/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-system/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-collections/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-asn1/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-certificates/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-build/lib:/home/build-user/swift-nightly-install/usr/lib/swift/linux', 'SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'SWIFT_DRIVER_SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'CC=/home/build-user/swift-nightly-install/usr/bin/clang', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/release/swift-test', '--parallel', '--build-path', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64', '--configuration', 'release', '--very-verbose', '-Xswiftc', '-module-cache-path', '-Xswiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache', '-Xbuild-tools-swiftc', '-module-cache-path', '-Xbuild-tools-swiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache'] with cwd /home/build-user/swiftpm
16:50:16 --- bootstrap | 2025-06-18 21:50:15,807 | ERROR | MainThread | helpers | call | Line:73 | Process failure with return code 1: Command '['env', 'SWIFTCI_USE_LOCAL_DEPS=1', 'SWIFTPM_MACOS_DEPLOYMENT_TARGET=12.0', 'LD_LIBRARY_PATH=/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/bootstrap/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/tsc/lib:/home/build-user/build/buildbot_linux/llbuild-linux-x86_64/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-argument-parser/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-crypto/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-driver/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-system/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-collections/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-asn1/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-certificates/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-build/lib:/home/build-user/swift-nightly-install/usr/lib/swift/linux', 'SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'SWIFT_DRIVER_SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'CC=/home/build-user/swift-nightly-install/usr/bin/clang', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/release/swift-test', '--parallel', '--build-path', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64', '--configuration', 'release', '--very-verbose', '-Xswiftc', '-module-cache-path', '-Xswiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache', '-Xbuild-tools-swiftc', '-module-cache-path', '-Xbuild-tools-swiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache']' returned non-zero exit status 1.
16:50:16 [---- START stdout ----]
16:50:16 None
16:50:16 [---- END stdout ----]
16:50:16 [---- START stderr ----]
16:50:16 None
16:50:16 [---- END stderr ----]
16:50:16 [---- START OUTPUT ----]
16:50:16 None
16:50:16 [---- END OUTPUT ----]
16:50:16 --- bootstrap | 2025-06-18 21:50:15,808 | DEBUG | MainThread | bootstrap | wrapper | Line:64 | Done call to call_swiftpm ...
16:50:16 --- bootstrap | 2025-06-18 21:50:15,808 | DEBUG | MainThread | bootstrap | wrapper | Line:64 | Done call to test ...
16:50:16 --- bootstrap | 2025-06-18 21:50:15,808 | DEBUG | MainThread | bootstrap | wrapper | Line:64 | Done call to main ...
16:50:16 Traceback (most recent call last):
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 979, in <module>
16:50:16 main()
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 62, in wrapper
16:50:16 return func(*args, **kwargs)
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 102, in main
16:50:16 args.func(args)
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 62, in wrapper
16:50:16 return func(*args, **kwargs)
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 476, in test
16:50:16 call_swiftpm(args, cmd)
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 62, in wrapper
16:50:16 return func(*args, **kwargs)
16:50:16 File "/home/build-user/swiftpm/Utilities/bootstrap", line 826, in call_swiftpm
16:50:16 call(full_cmd, cwd=cwd)
16:50:16 File "/home/build-user/swiftpm/Utilities/helpers.py", line 92, in call
16:50:16 raise cpe
16:50:16 File "/home/build-user/swiftpm/Utilities/helpers.py", line 70, in call
16:50:16 subprocess.check_call(cmd, cwd=cwd)
16:50:16 File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
16:50:16 raise CalledProcessError(retcode, cmd)
16:50:16 subprocess.CalledProcessError: Command '['env', 'SWIFTCI_USE_LOCAL_DEPS=1', 'SWIFTPM_MACOS_DEPLOYMENT_TARGET=12.0', 'LD_LIBRARY_PATH=/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/bootstrap/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/tsc/lib:/home/build-user/build/buildbot_linux/llbuild-linux-x86_64/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-argument-parser/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-crypto/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-driver/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-system/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-collections/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-asn1/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-certificates/lib:/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/swift-build/lib:/home/build-user/swift-nightly-install/usr/lib/swift/linux', 'SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'SWIFT_DRIVER_SWIFT_EXEC=/home/build-user/swift-nightly-install/usr/bin/swiftc', 'CC=/home/build-user/swift-nightly-install/usr/bin/clang', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/x86_64-unknown-linux-gnu/release/swift-test', '--parallel', '--build-path', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64', '--configuration', 'release', '--very-verbose', '-Xswiftc', '-module-cache-path', '-Xswiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache', '-Xbuild-tools-swiftc', '-module-cache-path', '-Xbuild-tools-swiftc', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64/module-cache']' returned non-zero exit status 1.
16:50:16 ERROR: command `['/home/build-user/swiftpm/Utilities/bootstrap', 'test', '--release', '--swiftc-path', '/home/build-user/swift-nightly-install/usr/bin/swiftc', '--clang-path', '/home/build-user/swift-nightly-install/usr/bin/clang', '--cmake-path', '/home/build-user/build/cmake-linux-x86_64/bin/cmake', '--ninja-path', '/usr/bin/ninja', '--build-dir', '/home/build-user/build/buildbot_linux/swiftpm-linux-x86_64', '--llbuild-build-dir', '/home/build-user/build/buildbot_linux/llbuild-linux-x86_64', '--dispatch-build-dir', '/home/build-user/build/buildbot_linux/libdispatch-linux-x86_64', '--verbose']` terminated with a non-zero exit status 1, aborting