[INFO] fetching crate rmrfrs-lib 0.8.8...
[INFO] checking rmrfrs-lib-0.8.8 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate rmrfrs-lib 0.8.8 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rmrfrs-lib 0.8.8
[INFO] finished tweaking crates.io crate rmrfrs-lib 0.8.8
[INFO] tweaked toml for crates.io crate rmrfrs-lib 0.8.8 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rmrfrs-lib 0.8.8 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rmrfrs-lib 0.8.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0c2e7b28102cafdbca248267a2d3cadb31d6c6427b2c969343346f7a6227449
[INFO] running `Command { std: "docker" "start" "-a" "b0c2e7b28102cafdbca248267a2d3cadb31d6c6427b2c969343346f7a6227449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0c2e7b28102cafdbca248267a2d3cadb31d6c6427b2c969343346f7a6227449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0c2e7b28102cafdbca248267a2d3cadb31d6c6427b2c969343346f7a6227449", kill_on_drop: false }`
[INFO] [stdout] b0c2e7b28102cafdbca248267a2d3cadb31d6c6427b2c969343346f7a6227449
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51f96c560b5223709da2e20c84e80c0ad806dbc548b3ed0068130e81b92a4e93
[INFO] running `Command { std: "docker" "start" "-a" "51f96c560b5223709da2e20c84e80c0ad806dbc548b3ed0068130e81b92a4e93", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking bstr v1.8.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking globset v0.4.15
[INFO] [stderr]     Checking ignore v0.4.23
[INFO] [stderr]     Checking rmrfrs-lib v0.8.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:166:17
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn name(&self) -> Cow<str> {
[INFO] [stdout]     |                 ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn name(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:166:17
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn name(&self) -> Cow<str> {
[INFO] [stdout]     |                 ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 166 |     pub fn name(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.46s
[INFO] running `Command { std: "docker" "inspect" "51f96c560b5223709da2e20c84e80c0ad806dbc548b3ed0068130e81b92a4e93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51f96c560b5223709da2e20c84e80c0ad806dbc548b3ed0068130e81b92a4e93", kill_on_drop: false }`
[INFO] [stdout] 51f96c560b5223709da2e20c84e80c0ad806dbc548b3ed0068130e81b92a4e93