Unreliable test failure observed on CI: test_boot_validator_from_file

[jackcmay]

---- test_boot_validator_from_file stdout ----

  | thread 'test_boot_validator_from_file' panicked at 'assertion failed: (left == right)
  | left: 500,
  | right: 1000', tests/multinode.rs:465:5
  | note: Some details are omitted, run with RUST_BACKTRACE=full for a verbose backtrace.
  | stack backtrace:
  | 0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
  | at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
  | 1: std::sys_common::backtrace::print
  | at libstd/sys_common/backtrace.rs:71
  | at libstd/sys_common/backtrace.rs:59
  | 2: std::panicking::default_hook::{{closure}}
  | at libstd/panicking.rs:211
  | 3: std::panicking::default_hook
  | at libstd/panicking.rs:221
  | 4: std::panicking::rust_panic_with_hook
  | at libstd/panicking.rs:475
  | 5: std::panicking::continue_panic_fmt
  | at libstd/panicking.rs:390
  | 6: std::panicking::begin_panic_fmt
  | at libstd/panicking.rs:345
  | 7: multinode::test_boot_validator_from_file
  | at tests/multinode.rs:465
  | 8: multinode::__test::TESTS::{{closure}}
  | at tests/multinode.rs:441
  | 9: core::ops::function::FnOnce::call_once
  | at /checkout/src/libcore/ops/function.rs:223
  | 10: <F as alloc::boxed::FnBox>::call_box
  | at libtest/lib.rs:1451
  | at /checkout/src/libcore/ops/function.rs:223
  | at /checkout/src/liballoc/boxed.rs:642
  | 11: __rust_maybe_catch_panic
  | at libpanic_unwind/lib.rs:105
  |  

[mvines]

Dup of #1484