[INFO] fetching crate pier 0.1.2...
[INFO] checking pier-0.1.2 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate pier 0.1.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate pier 0.1.2 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pier 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate pier 0.1.2
[INFO] tweaked toml for crates.io crate pier 0.1.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate pier 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.89
[INFO] [stderr]   Downloaded snafu v0.5.0
[INFO] [stderr]   Downloaded globwalk v0.5.0
[INFO] [stderr]   Downloaded assert_fs v0.11.3
[INFO] [stderr]   Downloaded doc-comment v0.3.1
[INFO] [stderr]   Downloaded normalize-line-endings v0.2.2
[INFO] [stderr]   Downloaded proc-macro2 v0.2.3
[INFO] [stderr]   Downloaded assert_cmd v0.11.1
[INFO] [stderr]   Downloaded globset v0.4.4
[INFO] [stderr]   Downloaded syn v0.15.29
[INFO] [stderr]   Downloaded float-cmp v0.4.0
[INFO] [stderr]   Downloaded csv v1.0.7
[INFO] [stderr]   Downloaded bstr v0.2.8
[INFO] [stderr]   Downloaded encode_unicode v0.3.5
[INFO] [stderr]   Downloaded cc v1.0.37
[INFO] [stderr]   Downloaded csv-core v0.1.5
[INFO] [stderr]   Downloaded quote v0.4.2
[INFO] [stderr]   Downloaded memchr v2.2.0
[INFO] [stderr]   Downloaded escargot v0.4.0
[INFO] [stderr]   Downloaded ignore v0.4.10
[INFO] [stderr]   Downloaded syn v0.12.15
[INFO] [stderr]   Downloaded backtrace v0.3.16
[INFO] [stderr]   Downloaded clap v2.27.1
[INFO] [stderr]   Downloaded enum-kinds v0.4.1
[INFO] [stderr]   Downloaded predicates v1.0.1
[INFO] [stderr]   Downloaded regex v1.1.9
[INFO] [stderr]   Downloaded winapi v0.3.6
[INFO] [stderr]   Downloaded snafu-derive v0.5.0
[INFO] [stderr]   Downloaded textwrap v0.9.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.51
[INFO] [stderr]   Downloaded ryu v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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] a3b3ee26c1d1233f2064a08948ae36e0af01900bbfdb7ede080d98f75186d83a
[INFO] running `Command { std: "docker" "start" "-a" "a3b3ee26c1d1233f2064a08948ae36e0af01900bbfdb7ede080d98f75186d83a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3b3ee26c1d1233f2064a08948ae36e0af01900bbfdb7ede080d98f75186d83a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3b3ee26c1d1233f2064a08948ae36e0af01900bbfdb7ede080d98f75186d83a", kill_on_drop: false }`
[INFO] [stdout] a3b3ee26c1d1233f2064a08948ae36e0af01900bbfdb7ede080d98f75186d83a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] e0cf8dfb1ca7da56086d7567453cf1eb562d8bc380cb9390bb78406b362da91c
[INFO] running `Command { std: "docker" "start" "-a" "e0cf8dfb1ca7da56086d7567453cf1eb562d8bc380cb9390bb78406b362da91c", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling doc-comment v0.3.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.14
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking same-file v1.0.5
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking encode_unicode v0.3.5
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking normalize-line-endings v0.2.2
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking walkdir v2.2.9
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking ryu v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling backtrace v0.3.16
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking clap v2.27.1
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling enum-kinds v0.4.1
[INFO] [stderr]     Checking globset v0.4.4
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking ignore v0.4.10
[INFO] [stderr]     Checking globwalk v0.5.0
[INFO] [stderr]     Checking assert_fs v0.11.3
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling snafu-derive v0.5.0
[INFO] [stderr]     Checking snafu v0.5.0
[INFO] [stderr]     Checking csv v1.0.7
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking pier v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]    --> src/lib.rs:173:23
[INFO] [stdout]     |
[INFO] [stdout] 173 |     pub fn run(&self, arg: &str) -> Result<()> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]    --> src/lib.rs:173:23
[INFO] [stdout]     |
[INFO] [stdout] 173 |     pub fn run(&self, arg: &str) -> Result<()> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `Command { std: "docker" "inspect" "e0cf8dfb1ca7da56086d7567453cf1eb562d8bc380cb9390bb78406b362da91c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0cf8dfb1ca7da56086d7567453cf1eb562d8bc380cb9390bb78406b362da91c", kill_on_drop: false }`
[INFO] [stdout] e0cf8dfb1ca7da56086d7567453cf1eb562d8bc380cb9390bb78406b362da91c