[INFO] fetching crate scan 0.1.0...
[INFO] testing scan-0.1.0 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate scan 0.1.0 into /workspace/builds/worker-56/source
[INFO] validating manifest of crates.io crate scan 0.1.0 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scan 0.1.0
[INFO] finished tweaking crates.io crate scan 0.1.0
[INFO] tweaked toml for crates.io crate scan 0.1.0 written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ade4dbe1dc6483b523a787a14de56fc5a1e8bffdd74492b640f90030c8abec56
[INFO] running `Command { std: "docker" "start" "-a" "ade4dbe1dc6483b523a787a14de56fc5a1e8bffdd74492b640f90030c8abec56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ade4dbe1dc6483b523a787a14de56fc5a1e8bffdd74492b640f90030c8abec56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ade4dbe1dc6483b523a787a14de56fc5a1e8bffdd74492b640f90030c8abec56", kill_on_drop: false }`
[INFO] [stdout] ade4dbe1dc6483b523a787a14de56fc5a1e8bffdd74492b640f90030c8abec56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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=warn" "-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" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ff7862b3929c9a6c3d101e0a62054e6ae2cb17a7806cd2dd7062da34ae66413
[INFO] running `Command { std: "docker" "start" "-a" "9ff7862b3929c9a6c3d101e0a62054e6ae2cb17a7806cd2dd7062da34ae66413", kill_on_drop: false }`
[INFO] [stderr]    Compiling scan v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved imports `std::io::Chars`, `std::io::CharsError`
[INFO] [stdout]  --> src/scan.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{Read, Chars, CharsError, BufReader};
[INFO] [stdout]   |                     ^^^^^  ^^^^^^^^^^ no `CharsError` in `io`
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     no `Chars` in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stdout]   --> src/scan.rs:51:27
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl<F: FromStr> From<io::CharsError> for ScanError<F> {
[INFO] [stdout]    |                           ^^^^^^^^^^ not found in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `CharsError` in module `io`
[INFO] [stdout]   --> src/scan.rs:52:20
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn from(e: io::CharsError) -> ScanError<F> { ScanError::Io(e) }
[INFO] [stdout]    |                    ^^^^^^^^^^ not found in `io`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:40:1
[INFO] [stdout]    |
[INFO] [stdout] 40 | #![feature(io)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Display`
[INFO] [stdout]  --> src/scan.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::fmt::{Debug, Display};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/scan.rs:71:32
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn cause(&self) -> Option<&Error> {
[INFO] [stdout]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/scan.rs:275:16
[INFO] [stdout]     |
[INFO] [stdout] 275 |     let file = try!(File::open(path));
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/scan.rs:66:46
[INFO] [stdout]    |
[INFO] [stdout] 66 |             ScanError::Io(ref err) => Error::description(err),
[INFO] [stdout]    |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/scan.rs:65:46
[INFO] [stdout]    |
[INFO] [stdout] 65 |             ScanError::Parse(ref err) => err.description(),
[INFO] [stdout]    |                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `chars` found for type parameter `R` in the current scope
[INFO] [stdout]    --> src/scan.rs:199:32
[INFO] [stdout]     |
[INFO] [stdout] 199 |         Scanner{ chars: reader.chars(), ignore: f }
[INFO] [stdout]     |                                ^^^^^ method not found in `R`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0432, E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scan` due to 6 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9ff7862b3929c9a6c3d101e0a62054e6ae2cb17a7806cd2dd7062da34ae66413", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ff7862b3929c9a6c3d101e0a62054e6ae2cb17a7806cd2dd7062da34ae66413", kill_on_drop: false }`
[INFO] [stdout] 9ff7862b3929c9a6c3d101e0a62054e6ae2cb17a7806cd2dd7062da34ae66413
