[INFO] fetching crate two_timer 2.2.1...
[INFO] checking two_timer-2.2.1 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate two_timer 2.2.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate two_timer 2.2.1 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate two_timer 2.2.1
[INFO] finished tweaking crates.io crate two_timer 2.2.1
[INFO] tweaked toml for crates.io crate two_timer 2.2.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate two_timer 2.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e1f489360b9c62de452d2da031f8fc5ee724cfeb2052a689cadc962cf7d45abe
[INFO] running `Command { std: "docker" "start" "-a" "e1f489360b9c62de452d2da031f8fc5ee724cfeb2052a689cadc962cf7d45abe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1f489360b9c62de452d2da031f8fc5ee724cfeb2052a689cadc962cf7d45abe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1f489360b9c62de452d2da031f8fc5ee724cfeb2052a689cadc962cf7d45abe", kill_on_drop: false }`
[INFO] [stdout] e1f489360b9c62de452d2da031f8fc5ee724cfeb2052a689cadc962cf7d45abe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01370a22cfd00bca236bd214e7d15d5ee3de51bacc72b78e3df450d3dd6a06cb
[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" "01370a22cfd00bca236bd214e7d15d5ee3de51bacc72b78e3df450d3dd6a06cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.100
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]     Checking serde_regex v0.4.0
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking pidgin v0.4.0
[INFO] [stderr]     Checking two_timer v2.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]     --> tests/tests.rs:1833:37
[INFO] [stdout]      |
[INFO] [stdout] 1833 |                 _ => assert!(false, format!("unexpected error: {:?}", e)),
[INFO] [stdout]      |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]      = note: this is no longer accepted in Rust 2021
[INFO] [stdout]      = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]      |
[INFO] [stdout] 1833 |                 _ => assert!(false, "unexpected error: {:?}", e),
[INFO] [stdout]      |                                    --                         --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.61s
[INFO] running `Command { std: "docker" "inspect" "01370a22cfd00bca236bd214e7d15d5ee3de51bacc72b78e3df450d3dd6a06cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01370a22cfd00bca236bd214e7d15d5ee3de51bacc72b78e3df450d3dd6a06cb", kill_on_drop: false }`
[INFO] [stdout] 01370a22cfd00bca236bd214e7d15d5ee3de51bacc72b78e3df450d3dd6a06cb