[INFO] fetching crate hg-core 0.0.1...
[INFO] checking hg-core-0.0.1 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate hg-core 0.0.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate hg-core 0.0.1 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hg-core 0.0.1
[INFO] finished tweaking crates.io crate hg-core 0.0.1
[INFO] tweaked toml for crates.io crate hg-core 0.0.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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] fe11711fe6c56bdbb75eb02c952fd319181b0d7d9d7a34654f1349b4ff19ebe8
[INFO] running `Command { std: "docker" "start" "-a" "fe11711fe6c56bdbb75eb02c952fd319181b0d7d9d7a34654f1349b4ff19ebe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe11711fe6c56bdbb75eb02c952fd319181b0d7d9d7a34654f1349b4ff19ebe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe11711fe6c56bdbb75eb02c952fd319181b0d7d9d7a34654f1349b4ff19ebe8", kill_on_drop: false }`
[INFO] [stdout] fe11711fe6c56bdbb75eb02c952fd319181b0d7d9d7a34654f1349b4ff19ebe8
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdd5419f804655c6af6648a3395e7746a0f38a98a2b73bd34ed8b30e257a600e
[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" "bdd5419f804655c6af6648a3395e7746a0f38a98a2b73bd34ed8b30e257a600e", kill_on_drop: false }`
[INFO] [stderr]     Checking hg-core v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/test_missing_ancestors.rs:162:16
[INFO] [stdout]     |
[INFO] [stdout] 162 |           panic!(format!(
[INFO] [stdout]     |  ________________^
[INFO] [stdout] 163 | |             "Equality assertion failed (left != right)
[INFO] [stdout] 164 | |                 left={:?}
[INFO] [stdout] 165 | |                 right={:?}
[INFO] [stdout] ...   |
[INFO] [stdout] 176 | |             self.random_seed,
[INFO] [stdout] 177 | |         ));
[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: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> tests/test_missing_ancestors.rs:237:16
[INFO] [stdout]     |
[INFO] [stdout] 237 |         panic!(err_msg);
[INFO] [stdout]     |                ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 237 |         panic!("{}", err_msg);
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 237 |         std::panic::panic_any(err_msg);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.82s
[INFO] running `Command { std: "docker" "inspect" "bdd5419f804655c6af6648a3395e7746a0f38a98a2b73bd34ed8b30e257a600e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdd5419f804655c6af6648a3395e7746a0f38a98a2b73bd34ed8b30e257a600e", kill_on_drop: false }`
[INFO] [stdout] bdd5419f804655c6af6648a3395e7746a0f38a98a2b73bd34ed8b30e257a600e