Testing/CI/TransientFailures

• https://gitlab.com/qemu-project/qemu/-/jobs/1441049292
• https://gitlab.com/qemu-project/qemu/-/jobs/1440817649
• https://gitlab.com/qemu-project/qemu/-/jobs/1439055561
  • somehow fails to find its 'build' directory
  • possibly gitlab is purging old artifacts when hitting some quota limit
  • might be caused by having a second pipeline running on "master" at same time sa pipeline on "staging"
• https://gitlab.com/qemu-project/qemu/-/jobs/1440817390
  • somehow got "fatal error: qapi/qapi-builtin-types.h: No such file or directory"
  • probably a meson build dependency missing
• https://gitlab.com/qemu-project/qemu/-/jobs/1440813802
  • the linker randomly died with "clang-11: error: unable to execute command: Killed"
  • could be memory exhaustion as LTO and CFI is quite resource intensive
• https://gitlab.com/qemu-project/qemu/-/jobs/1439196262
• https://gitlab.com/qemu-project/qemu/-/jobs/1439196216
• https://gitlab.com/qemu-project/qemu/-/jobs/1439194798
  • is good old "job took longer than an hour and gitlab killed it"
  • unusually slow CI worker
  • should bump max job limit to give more headroom
• https://gitlab.com/qemu-project/qemu/-/jobs/1439196259
  • was "error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: INTERNAL_ERROR (err 2)" on initial git clone
  • transient gitlab infrastructure issue
• https://gitlab.com/qemu-project/qemu/-/jobs/1439194687
  • is the "trace/trace-ui.h: No such file or directory"
  • probably a meson build dependency missing
• https://gitlab.com/qemu-project/qemu/-/jobs/1438817749
  • is I think "QEMU process mysteriously killed during iotests run"
• https://gitlab.com/qemu-project/qemu/-/jobs/1438817628
  • is "received unexpected HTTP status: 500 Server Error" during some docker operation
  • transient gitlab infrastructure issue