[INFO] fetching crate picontrol 0.2.1...
[INFO] checking picontrol-0.2.1 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate picontrol 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate picontrol 0.2.1 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 picontrol 0.2.1
[INFO] finished tweaking crates.io crate picontrol 0.2.1
[INFO] tweaked toml for crates.io crate picontrol 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate picontrol 0.2.1 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] d607e0bcd25bc509d84ed8fdb09442a473c6eeeb8422cd5fe5d6814abc631e16
[INFO] running `Command { std: "docker" "start" "-a" "d607e0bcd25bc509d84ed8fdb09442a473c6eeeb8422cd5fe5d6814abc631e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d607e0bcd25bc509d84ed8fdb09442a473c6eeeb8422cd5fe5d6814abc631e16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d607e0bcd25bc509d84ed8fdb09442a473c6eeeb8422cd5fe5d6814abc631e16", kill_on_drop: false }`
[INFO] [stdout] d607e0bcd25bc509d84ed8fdb09442a473c6eeeb8422cd5fe5d6814abc631e16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 4c92c7960d61114c391d581ee8f61d61f73e6c8b11b8c49da1e0d0029fa80fc7
[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" "4c92c7960d61114c391d581ee8f61d61f73e6c8b11b8c49da1e0d0029fa80fc7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking picontrol v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:178:75
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn read(&mut self, offset: u64, length: usize) -> std::io::Result<(Vec<u8>)> {
[INFO] [stdout]     |                                                                           ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:191:77
[INFO] [stdout]     |
[INFO] [stdout] 191 |     pub fn write(&mut self, offset: u64, data: &Vec<u8>) -> std::io::Result<(bool)> {
[INFO] [stdout]     |                                                                             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:266:57
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn dump(&mut self, fp: &str) -> std::io::Result<(bool)> {
[INFO] [stdout]     |                                                         ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:178:75
[INFO] [stdout]     |
[INFO] [stdout] 178 |     pub fn read(&mut self, offset: u64, length: usize) -> std::io::Result<(Vec<u8>)> {
[INFO] [stdout]     |                                                                           ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:191:77
[INFO] [stdout]     |
[INFO] [stdout] 191 |     pub fn write(&mut self, offset: u64, data: &Vec<u8>) -> std::io::Result<(bool)> {
[INFO] [stdout]     |                                                                             ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:266:57
[INFO] [stdout]     |
[INFO] [stdout] 266 |     pub fn dump(&mut self, fp: &str) -> std::io::Result<(bool)> {
[INFO] [stdout]     |                                                         ^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.93s
[INFO] running `Command { std: "docker" "inspect" "4c92c7960d61114c391d581ee8f61d61f73e6c8b11b8c49da1e0d0029fa80fc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c92c7960d61114c391d581ee8f61d61f73e6c8b11b8c49da1e0d0029fa80fc7", kill_on_drop: false }`
[INFO] [stdout] 4c92c7960d61114c391d581ee8f61d61f73e6c8b11b8c49da1e0d0029fa80fc7