[INFO] cloning repository https://github.com/kpcyrd/defcon26-pow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kpcyrd/defcon26-pow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpcyrd%2Fdefcon26-pow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpcyrd%2Fdefcon26-pow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d17edcaf67cb2a8455e7797f3a373b9c250a3cee
[INFO] checking kpcyrd/defcon26-pow against try#99a443d6903f71d521237d8acb5a3016b534d17b for pr-83354
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpcyrd%2Fdefcon26-pow" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kpcyrd/defcon26-pow on toolchain 99a443d6903f71d521237d8acb5a3016b534d17b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kpcyrd/defcon26-pow
[INFO] finished tweaking git repo https://github.com/kpcyrd/defcon26-pow
[INFO] tweaked toml for git repo https://github.com/kpcyrd/defcon26-pow written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/kpcyrd/defcon26-pow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3af5d42f5f37cdc3bc798138500ea862e893d1430439ad73bcb24fe10c815969
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3af5d42f5f37cdc3bc798138500ea862e893d1430439ad73bcb24fe10c815969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3af5d42f5f37cdc3bc798138500ea862e893d1430439ad73bcb24fe10c815969", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af5d42f5f37cdc3bc798138500ea862e893d1430439ad73bcb24fe10c815969", kill_on_drop: false }`
[INFO] [stdout] 3af5d42f5f37cdc3bc798138500ea862e893d1430439ad73bcb24fe10c815969
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+99a443d6903f71d521237d8acb5a3016b534d17b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03de9e92e9dab7d95a28be79f2d1fef600a786be41f17958598addd05231d130
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "03de9e92e9dab7d95a28be79f2d1fef600a786be41f17958598addd05231d130", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking arrayref v0.3.4
[INFO] [stderr]     Checking byteorder v1.2.2
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking digest v0.7.2
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]     Checking defcon26-pow v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `bench_pow_hash` in this scope
[INFO] [stdout]    --> src/main.rs:117:5
[INFO] [stdout]     |
[INFO] [stdout] 117 | /     fn bench_pow_hash(b: &mut Bencher) {
[INFO] [stdout] 118 | |         b.iter(|| pow_hash("e2ZgIzlOpe", 52644528));
[INFO] [stdout] 119 | |     }
[INFO] [stdout]     | |_____^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `bench_pow_valid` in this scope
[INFO] [stdout]    --> src/main.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 | /     fn bench_pow_valid(b: &mut Bencher) {
[INFO] [stdout] 124 | |         b.iter(|| check_pow("e2ZgIzlOpe", 26, 52644528));
[INFO] [stdout] 125 | |     }
[INFO] [stdout]     | |_____^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/main.rs:115:7
[INFO] [stdout]     |
[INFO] [stdout] 115 |     #[bench]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(soft_unstable)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/main.rs:121:7
[INFO] [stdout]     |
[INFO] [stdout] 121 |     #[bench]
[INFO] [stdout]     |       ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `defcon26-pow`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused return value of `collect` that must be used
[INFO] [stdout]   --> src/main.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     children.into_iter()
[INFO] [stdout] 83 | |         .map(|c| c.join().unwrap())
[INFO] [stdout] 84 | |         .collect::<Vec<_>>();
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "03de9e92e9dab7d95a28be79f2d1fef600a786be41f17958598addd05231d130", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03de9e92e9dab7d95a28be79f2d1fef600a786be41f17958598addd05231d130", kill_on_drop: false }`
[INFO] [stdout] 03de9e92e9dab7d95a28be79f2d1fef600a786be41f17958598addd05231d130