[INFO] fetching crate utf8-bufread 1.0.0...
[INFO] checking utf8-bufread-1.0.0 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate utf8-bufread 1.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate utf8-bufread 1.0.0 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate utf8-bufread 1.0.0
[INFO] finished tweaking crates.io crate utf8-bufread 1.0.0
[INFO] tweaked toml for crates.io crate utf8-bufread 1.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f0786128460a146bbdda3fb56826e8b1e8e42fc7bf16f8bebeaada48b1604f3c
[INFO] running `Command { std: "docker" "start" "-a" "f0786128460a146bbdda3fb56826e8b1e8e42fc7bf16f8bebeaada48b1604f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f0786128460a146bbdda3fb56826e8b1e8e42fc7bf16f8bebeaada48b1604f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0786128460a146bbdda3fb56826e8b1e8e42fc7bf16f8bebeaada48b1604f3c", kill_on_drop: false }`
[INFO] [stdout] f0786128460a146bbdda3fb56826e8b1e8e42fc7bf16f8bebeaada48b1604f3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5adff828323c40b541e636563e8d13356a31395bc632793ad449922bc9ca9de3
[INFO] running `Command { std: "docker" "start" "-a" "5adff828323c40b541e636563e8d13356a31395bc632793ad449922bc9ca9de3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking utf8-bufread v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking trybuild v1.0.42
[INFO] [stdout] error[E0599]: no method named `with_utf8_chunk` found for mutable reference `&mut R` in the current scope
[INFO] [stdout]   --> benches/read_utf8.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 |     r.with_utf8_chunk(|s| {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^ method not found in `&mut R`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_utf8` found for struct `BufReader` in the current scope
[INFO] [stdout]   --> benches/read_utf8.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |             match r.read_utf8(&mut buf) {
[INFO] [stdout]    |                     ^^^^^^^^^ method not found in `BufReader<File>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_utf8` found for struct `BufReader` in the current scope
[INFO] [stdout]   --> benches/read_utf8.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |             match r.read_utf8(&mut buf) {
[INFO] [stdout]    |                     ^^^^^^^^^ method not found in `BufReader<File>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `utf8-bufread`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5adff828323c40b541e636563e8d13356a31395bc632793ad449922bc9ca9de3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5adff828323c40b541e636563e8d13356a31395bc632793ad449922bc9ca9de3", kill_on_drop: false }`
[INFO] [stdout] 5adff828323c40b541e636563e8d13356a31395bc632793ad449922bc9ca9de3