[INFO] fetching crate scan 0.1.0...
[INFO] checking scan-0.1.0 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate scan 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate scan 0.1.0 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "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-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0828d9bc654800adfd4742a789bb46102a782a34e7f7915daef0178e0bc2b58f
[INFO] running `Command { std: "docker" "start" "-a" "0828d9bc654800adfd4742a789bb46102a782a34e7f7915daef0178e0bc2b58f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0828d9bc654800adfd4742a789bb46102a782a34e7f7915daef0178e0bc2b58f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0828d9bc654800adfd4742a789bb46102a782a34e7f7915daef0178e0bc2b58f", kill_on_drop: false }`
[INFO] [stdout] 0828d9bc654800adfd4742a789bb46102a782a34e7f7915daef0178e0bc2b58f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a52dfca333b8a3701d0a1245538b80923816f233a97c777088b6bd7c3292bdac
[INFO] running `Command { std: "docker" "start" "-a" "a52dfca333b8a3701d0a1245538b80923816f233a97c777088b6bd7c3292bdac", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking 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]   = help: consider importing this struct instead:
[INFO] [stdout]           std::str::Chars
[INFO] [stdout] 
[INFO] [stdout] 
[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]   = help: consider importing this struct instead:
[INFO] [stdout]           std::str::Chars
[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[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[E0635]: unknown feature `io`
[INFO] [stdout]   --> src/lib.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | #![feature(io)]
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `io`
[INFO] [stdout]   --> src/lib.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | #![feature(io)]
[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] 184 | impl<R: Read, F: Fn(&char) -> bool> Scanner<Chars<R>, F> {
[INFO] [stdout]     |      - method `chars` not found for this type parameter
[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[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] 184 | impl<R: Read, F: Fn(&char) -> bool> Scanner<Chars<R>, F> {
[INFO] [stdout]     |      - method `chars` not found for this type parameter
[INFO] [stdout] ...
[INFO] [stdout] 199 |         Scanner{ chars: reader.chars(), ignore: f }
[INFO] [stdout]     |                                ^^^^^ method not found in `R`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0432, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0432, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scan` (lib test) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `scan` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "a52dfca333b8a3701d0a1245538b80923816f233a97c777088b6bd7c3292bdac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a52dfca333b8a3701d0a1245538b80923816f233a97c777088b6bd7c3292bdac", kill_on_drop: false }`
[INFO] [stdout] a52dfca333b8a3701d0a1245538b80923816f233a97c777088b6bd7c3292bdac