[INFO] fetching crate uciengine 0.1.33...
[INFO] checking uciengine-0.1.33 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate uciengine 0.1.33 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate uciengine 0.1.33 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate uciengine 0.1.33
[INFO] finished tweaking crates.io crate uciengine 0.1.33
[INFO] tweaked toml for crates.io crate uciengine 0.1.33 written to /workspace/builds/worker-54/source/Cargo.toml
[INFO] crate crates.io crate uciengine 0.1.33 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56289525bcb5eda1d86b86e744194f0c521a0f582674bf8630a4c5f914b651db
[INFO] running `Command { std: "docker" "start" "-a" "56289525bcb5eda1d86b86e744194f0c521a0f582674bf8630a4c5f914b651db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56289525bcb5eda1d86b86e744194f0c521a0f582674bf8630a4c5f914b651db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56289525bcb5eda1d86b86e744194f0c521a0f582674bf8630a4c5f914b651db", kill_on_drop: false }`
[INFO] [stdout] 56289525bcb5eda1d86b86e744194f0c521a0f582674bf8630a4c5f914b651db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 994815f67910fb6f9a4f860372ca7f15db2bf05703b90cbf730757bfdd1d557c
[INFO] running `Command { std: "docker" "start" "-a" "994815f67910fb6f9a4f860372ca7f15db2bf05703b90cbf730757bfdd1d557c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking envor v0.1.5
[INFO] [stderr]     Checking thread_local v1.1.0
[INFO] [stderr]    Compiling tokio v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking env_logger v0.8.2
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking uciengine v0.1.33 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::string::String::len` that must be used
[INFO] [stdout]    --> src/analysis.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 | /                 value_ref.to_string().chars().rev().take_while(|c| {
[INFO] [stdout] 103 | |                     total_len -= 1;
[INFO] [stdout] 104 | |                     ( *c != trim ) || ( total_len > $size )
[INFO] [stdout] 105 | |                 }).collect::<String>().len();
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] ...
[INFO] [stdout] 191 | / gen_str_buff!(
[INFO] [stdout] 192 | | /// UciBuff
[INFO] [stdout] 193 | | => UciBuff, UCI_MAX_LENGTH,
[INFO] [stdout] 194 | | /// PvBuff
[INFO] [stdout] 195 | | => PvBuff, PV_BUFF_SIZE
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `gen_str_buff` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::string::String::len` that must be used
[INFO] [stdout]    --> src/analysis.rs:102:8
[INFO] [stdout]     |
[INFO] [stdout] 102 | /                 value_ref.to_string().chars().rev().take_while(|c| {
[INFO] [stdout] 103 | |                     total_len -= 1;
[INFO] [stdout] 104 | |                     ( *c != trim ) || ( total_len > $size )
[INFO] [stdout] 105 | |                 }).collect::<String>().len();
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] ...
[INFO] [stdout] 191 | / gen_str_buff!(
[INFO] [stdout] 192 | | /// UciBuff
[INFO] [stdout] 193 | | => UciBuff, UCI_MAX_LENGTH,
[INFO] [stdout] 194 | | /// PvBuff
[INFO] [stdout] 195 | | => PvBuff, PV_BUFF_SIZE
[INFO] [stdout] 196 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `gen_str_buff` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.76s
[INFO] running `Command { std: "docker" "inspect" "994815f67910fb6f9a4f860372ca7f15db2bf05703b90cbf730757bfdd1d557c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "994815f67910fb6f9a4f860372ca7f15db2bf05703b90cbf730757bfdd1d557c", kill_on_drop: false }`
[INFO] [stdout] 994815f67910fb6f9a4f860372ca7f15db2bf05703b90cbf730757bfdd1d557c