[INFO] cloning repository https://github.com/jeysal/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeysal/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4bc7c13833bb9d5ee9017012e479ed99a23a78ee
[INFO] checking jeysal/rust-playground against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeysal%2Frust-playground" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeysal/rust-playground 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 git repo https://github.com/jeysal/rust-playground
[INFO] finished tweaking git repo https://github.com/jeysal/rust-playground
[INFO] tweaked toml for git repo https://github.com/jeysal/rust-playground written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/jeysal/rust-playground 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 05d95aaacc1424fd84dff65be0b287322d6787dfe7a8a46ffe166bb8cf15067e
[INFO] running `Command { std: "docker" "start" "-a" "05d95aaacc1424fd84dff65be0b287322d6787dfe7a8a46ffe166bb8cf15067e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05d95aaacc1424fd84dff65be0b287322d6787dfe7a8a46ffe166bb8cf15067e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05d95aaacc1424fd84dff65be0b287322d6787dfe7a8a46ffe166bb8cf15067e", kill_on_drop: false }`
[INFO] [stdout] 05d95aaacc1424fd84dff65be0b287322d6787dfe7a8a46ffe166bb8cf15067e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] d8a731012bf9080d18b7f47095058e0a5938f9dcc17ac89b8d09547262dd62b2
[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" "d8a731012bf9080d18b7f47095058e0a5938f9dcc17ac89b8d09547262dd62b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.0.4
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir/hello)
[INFO] [stderr]     Checking temp_conv v0.1.0 (/opt/rustwide/workdir/temp_conv)
[INFO] [stderr]     Checking impl_conflict v0.1.0 (/opt/rustwide/workdir/impl_conflict)
[INFO] [stderr]     Checking fibonacci v0.1.0 (/opt/rustwide/workdir/fibonacci)
[INFO] [stderr]     Checking largest v0.1.0 (/opt/rustwide/workdir/largest)
[INFO] [stderr]     Checking memchr v2.0.2
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> hello/src/lib.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> hello/src/lib.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking aho-corasick v0.6.7
[INFO] [stderr]     Checking guess v0.1.0 (/opt/rustwide/workdir/guess)
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]     Checking collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> minigrep/src/lib.rs:7:61
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn run(pattern: &str, filename: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> minigrep/src/lib.rs:7:61
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn run(pattern: &str, filename: &str) -> Result<(), Box<Error>> {
[INFO] [stdout]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.66s
[INFO] running `Command { std: "docker" "inspect" "d8a731012bf9080d18b7f47095058e0a5938f9dcc17ac89b8d09547262dd62b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8a731012bf9080d18b7f47095058e0a5938f9dcc17ac89b8d09547262dd62b2", kill_on_drop: false }`
[INFO] [stdout] d8a731012bf9080d18b7f47095058e0a5938f9dcc17ac89b8d09547262dd62b2