[INFO] fetching crate bex 0.1.4...
[INFO] checking bex-0.1.4 against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] extracting crate bex 0.1.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate bex 0.1.4 on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bex 0.1.4
[INFO] finished tweaking crates.io crate bex 0.1.4
[INFO] tweaked toml for crates.io crate bex 0.1.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate bex 0.1.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98926a3b4e0b341769b671ed0155696d817d2161c552d1035d11aebfddd57f4a
[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" "98926a3b4e0b341769b671ed0155696d817d2161c552d1035d11aebfddd57f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98926a3b4e0b341769b671ed0155696d817d2161c552d1035d11aebfddd57f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98926a3b4e0b341769b671ed0155696d817d2161c552d1035d11aebfddd57f4a", kill_on_drop: false }`
[INFO] [stdout] 98926a3b4e0b341769b671ed0155696d817d2161c552d1035d11aebfddd57f4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8832f5baeee6714868041b4e1b8f0b39193f0fc9d829035f70929fbec2abf188
[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" "8832f5baeee6714868041b4e1b8f0b39193f0fc9d829035f70929fbec2abf188", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking bex v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/bdd.rs:864:45
[INFO] [stdout]     |
[INFO] [stdout] 864 |       debug_assert!(self.in_solution(&cur), format!("{:?}", cur.scope));
[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] 864 |       debug_assert!(self.in_solution(&cur), "{:?}", cur.scope);
[INFO] [stdout]     |                                            --               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/bdd.rs:864:45
[INFO] [stdout]     |
[INFO] [stdout] 864 |       debug_assert!(self.in_solution(&cur), format!("{:?}", cur.scope));
[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] 864 |       debug_assert!(self.in_solution(&cur), "{:?}", cur.scope);
[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 20.88s
[INFO] running `Command { std: "docker" "inspect" "8832f5baeee6714868041b4e1b8f0b39193f0fc9d829035f70929fbec2abf188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8832f5baeee6714868041b4e1b8f0b39193f0fc9d829035f70929fbec2abf188", kill_on_drop: false }`
[INFO] [stdout] 8832f5baeee6714868041b4e1b8f0b39193f0fc9d829035f70929fbec2abf188