[INFO] fetching crate borrowing_exerci 0.4.51...
[INFO] checking borrowing_exerci-0.4.51 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate borrowing_exerci 0.4.51 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate borrowing_exerci 0.4.51 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate borrowing_exerci 0.4.51
[INFO] finished tweaking crates.io crate borrowing_exerci 0.4.51
[INFO] tweaked toml for crates.io crate borrowing_exerci 0.4.51 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate borrowing_exerci 0.4.51 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wild v2.0.2
[INFO] [stderr]   Downloaded run_script v0.3.2
[INFO] [stderr]   Downloaded bat v0.12.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45afb636deda27d2f0d3914132e80cf9b2468b58f0797ad507d569e7fababf00
[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" "45afb636deda27d2f0d3914132e80cf9b2468b58f0797ad507d569e7fababf00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45afb636deda27d2f0d3914132e80cf9b2468b58f0797ad507d569e7fababf00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45afb636deda27d2f0d3914132e80cf9b2468b58f0797ad507d569e7fababf00", kill_on_drop: false }`
[INFO] [stdout] 45afb636deda27d2f0d3914132e80cf9b2468b58f0797ad507d569e7fababf00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9813fb5ceb97fb8d080b90e9fdf22b188cc78672d792d144437292d879e0f6bf
[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" "9813fb5ceb97fb8d080b90e9fdf22b188cc78672d792d144437292d879e0f6bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking users v0.9.1
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking run_script v0.3.2
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking csv v1.1.1
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking borrowing_exerci v0.4.51 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:259:65
[INFO] [stdout]     |
[INFO] [stdout] 259 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:266:65
[INFO] [stdout]     |
[INFO] [stdout] 266 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:285:71
[INFO] [stdout]     |
[INFO] [stdout] 285 |         Err(why) => panic!("couldn't create {}: {}", new_display, why.description()),
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:291:73
[INFO] [stdout]     |
[INFO] [stdout] 291 |         Err(why) => panic!("couldn't write to {}: {}", new_display, why.description()),
[INFO] [stdout]     |                                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:259:65
[INFO] [stdout]     |
[INFO] [stdout] 259 |         Err(why) => panic!("couldn't open {}: {}", display, why.description()),
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:266:65
[INFO] [stdout]     |
[INFO] [stdout] 266 |         Err(why) => panic!("couldn't read {}: {}", display, why.description()),
[INFO] [stdout]     |                                                                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:285:71
[INFO] [stdout]     |
[INFO] [stdout] 285 |         Err(why) => panic!("couldn't create {}: {}", new_display, why.description()),
[INFO] [stdout]     |                                                                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/lib.rs:291:73
[INFO] [stdout]     |
[INFO] [stdout] 291 |         Err(why) => panic!("couldn't write to {}: {}", new_display, why.description()),
[INFO] [stdout]     |                                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.76s
[INFO] running `Command { std: "docker" "inspect" "9813fb5ceb97fb8d080b90e9fdf22b188cc78672d792d144437292d879e0f6bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9813fb5ceb97fb8d080b90e9fdf22b188cc78672d792d144437292d879e0f6bf", kill_on_drop: false }`
[INFO] [stdout] 9813fb5ceb97fb8d080b90e9fdf22b188cc78672d792d144437292d879e0f6bf