[INFO] cloning repository https://github.com/Lainera/roll
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lainera/roll" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLainera%2Froll", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLainera%2Froll'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7d400216146edd60ad503c42fdbcdc6b03f6dc6
[INFO] checking Lainera/roll against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLainera%2Froll" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lainera/roll on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lainera/roll
[INFO] finished tweaking git repo https://github.com/Lainera/roll
[INFO] tweaked toml for git repo https://github.com/Lainera/roll written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Lainera/roll already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 751ea5efdf9d01ff48f2fd3c5f812e83b14c010318b0ebd197caf5ffd093d808
[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" "751ea5efdf9d01ff48f2fd3c5f812e83b14c010318b0ebd197caf5ffd093d808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "751ea5efdf9d01ff48f2fd3c5f812e83b14c010318b0ebd197caf5ffd093d808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "751ea5efdf9d01ff48f2fd3c5f812e83b14c010318b0ebd197caf5ffd093d808", kill_on_drop: false }`
[INFO] [stdout] 751ea5efdf9d01ff48f2fd3c5f812e83b14c010318b0ebd197caf5ffd093d808
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9709faa705302a7bc78a37c790fb5b1ee52e17eea02bd0bb084fd9d5c431e2a
[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" "a9709faa705302a7bc78a37c790fb5b1ee52e17eea02bd0bb084fd9d5c431e2a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.1
[INFO] [stderr]     Checking rand v0.6.4
[INFO] [stderr]     Checking roll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `result::Result`
[INFO] [stdout]  --> src/arguments.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{result::Result};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/arguments.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   /// skip filename
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 12 |   args.next();
[INFO] [stdout]    |   ----------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/arguments.rs:120:3
[INFO] [stdout]     |
[INFO] [stdout] 120 |   /// wildcard for both lower and uppercase D's
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 121 |   let d: &[_] = &['D', 'd'];
[INFO] [stdout]     |   -------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `result::Result`
[INFO] [stdout]  --> src/arguments.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{result::Result};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/arguments.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   /// skip filename
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 12 |   args.next();
[INFO] [stdout]    |   ----------- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/arguments.rs:120:3
[INFO] [stdout]     |
[INFO] [stdout] 120 |   /// wildcard for both lower and uppercase D's
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 121 |   let d: &[_] = &['D', 'd'];
[INFO] [stdout]     |   -------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stdout]   --> src/arguments.rs:27:3
[INFO] [stdout]    |
[INFO] [stdout] 27 |   arg.trim();
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stdout]   --> src/arguments.rs:27:3
[INFO] [stdout]    |
[INFO] [stdout] 27 |   arg.trim();
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.39s
[INFO] running `Command { std: "docker" "inspect" "a9709faa705302a7bc78a37c790fb5b1ee52e17eea02bd0bb084fd9d5c431e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9709faa705302a7bc78a37c790fb5b1ee52e17eea02bd0bb084fd9d5c431e2a", kill_on_drop: false }`
[INFO] [stdout] a9709faa705302a7bc78a37c790fb5b1ee52e17eea02bd0bb084fd9d5c431e2a
