[INFO] fetching crate mutf8 0.2.0...
[INFO] checking mutf8-0.2.0 against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] extracting crate mutf8 0.2.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate mutf8 0.2.0 on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutf8 0.2.0
[INFO] finished tweaking crates.io crate mutf8 0.2.0
[INFO] tweaked toml for crates.io crate mutf8 0.2.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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] 8daef7b3e79de4fbd20db5dd1928df132562083d73a513efdf8130d0c38524e3
[INFO] running `Command { std: "docker" "start" "-a" "8daef7b3e79de4fbd20db5dd1928df132562083d73a513efdf8130d0c38524e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8daef7b3e79de4fbd20db5dd1928df132562083d73a513efdf8130d0c38524e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8daef7b3e79de4fbd20db5dd1928df132562083d73a513efdf8130d0c38524e3", kill_on_drop: false }`
[INFO] [stdout] 8daef7b3e79de4fbd20db5dd1928df132562083d73a513efdf8130d0c38524e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "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] 545f5bf3d0b4a0fda3b71c7dc7cd739bab4a9520b083a71aaa9d70e9c86cf7f6
[INFO] running `Command { std: "docker" "start" "-a" "545f5bf3d0b4a0fda3b71c7dc7cd739bab4a9520b083a71aaa9d70e9c86cf7f6", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking mutf8 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/lib.rs:414:12
[INFO] [stdout]     |
[INFO] [stdout] 414 |             bits += ((byte4 as u32) & 0x3F);
[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 assigned value
[INFO] [stdout]    --> src/lib.rs:414:12
[INFO] [stdout]     |
[INFO] [stdout] 414 |             bits += ((byte4 as u32) & 0x3F);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:29:18
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:86:18
[INFO] [stdout]    |
[INFO] [stdout] 86 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:29:18
[INFO] [stdout]    |
[INFO] [stdout] 29 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:74:18
[INFO] [stdout]    |
[INFO] [stdout] 74 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:86:18
[INFO] [stdout]    |
[INFO] [stdout] 86 |             Cow::Borrowed(data) => {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[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] [stdout] warning: unused import: `MString`
[INFO] [stdout]  --> tests/to_mutf8.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mutf8::{MString, mstr};
[INFO] [stdout]   |             ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 1.03s
[INFO] running `Command { std: "docker" "inspect" "545f5bf3d0b4a0fda3b71c7dc7cd739bab4a9520b083a71aaa9d70e9c86cf7f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "545f5bf3d0b4a0fda3b71c7dc7cd739bab4a9520b083a71aaa9d70e9c86cf7f6", kill_on_drop: false }`
[INFO] [stdout] 545f5bf3d0b4a0fda3b71c7dc7cd739bab4a9520b083a71aaa9d70e9c86cf7f6