[INFO] fetching crate perw 0.0.1-prerelease...
[INFO] testing perw-0.0.1-prerelease against 1.95.0 for beta-1.96-2
[INFO] extracting crate perw 0.0.1-prerelease into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate perw 0.0.1-prerelease
[INFO] finished tweaking crates.io crate perw 0.0.1-prerelease
[INFO] tweaked toml for crates.io crate perw 0.0.1-prerelease written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate perw 0.0.1-prerelease on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate perw 0.0.1-prerelease 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.26
[INFO] [stderr]   Downloaded unicode-ident v1.0.8
[INFO] [stderr]   Downloaded proc-macro2 v1.0.56
[INFO] [stderr]   Downloaded snafu-derive v0.7.4
[INFO] [stderr]   Downloaded snafu v0.7.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92f594706b207606718caf1896350dfd88918b89fd99c40a2641e636f15f7602
[INFO] running `Command { std: "docker" "start" "-a" "92f594706b207606718caf1896350dfd88918b89fd99c40a2641e636f15f7602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92f594706b207606718caf1896350dfd88918b89fd99c40a2641e636f15f7602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92f594706b207606718caf1896350dfd88918b89fd99c40a2641e636f15f7602", kill_on_drop: false }`
[INFO] [stdout] 92f594706b207606718caf1896350dfd88918b89fd99c40a2641e636f15f7602
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1f6f3b66af9f8b5bd7fdae967990241e4644f0b5f99426e4455edc59c81f9cc
[INFO] running `Command { std: "docker" "start" "-a" "d1f6f3b66af9f8b5bd7fdae967990241e4644f0b5f99426e4455edc59c81f9cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling snafu-derive v0.7.4
[INFO] [stderr]    Compiling snafu v0.7.4
[INFO] [stderr]    Compiling perw v0.0.1-prerelease (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `ImageDosHeader` is never constructed
[INFO] [stdout]  --> src/pe/dos.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct ImageDosHeader {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `MAGIC_CONSTANT` is never used
[INFO] [stdout]   --> src/pe/dos.rs:50:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl ImageDosHeader {
[INFO] [stdout]    | ------------------- associated constant in this implementation
[INFO] [stdout] 50 |     pub const MAGIC_CONSTANT : u16 = 0x5A4D ;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.81s
[INFO] running `Command { std: "docker" "inspect" "d1f6f3b66af9f8b5bd7fdae967990241e4644f0b5f99426e4455edc59c81f9cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1f6f3b66af9f8b5bd7fdae967990241e4644f0b5f99426e4455edc59c81f9cc", kill_on_drop: false }`
[INFO] [stdout] d1f6f3b66af9f8b5bd7fdae967990241e4644f0b5f99426e4455edc59c81f9cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c186b7ec8bdc8d01409d819bb2692e2fd8d9cf7837a122a8c644fb6a594daaf5
[INFO] running `Command { std: "docker" "start" "-a" "c186b7ec8bdc8d01409d819bb2692e2fd8d9cf7837a122a8c644fb6a594daaf5", kill_on_drop: false }`
[INFO] [stdout] warning: struct `ImageDosHeader` is never constructed
[INFO] [stdout]  --> src/pe/dos.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct ImageDosHeader {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated constant `MAGIC_CONSTANT` is never used
[INFO] [stdout]   --> src/pe/dos.rs:50:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl ImageDosHeader {
[INFO] [stdout]    | ------------------- associated constant in this implementation
[INFO] [stdout] 50 |     pub const MAGIC_CONSTANT : u16 = 0x5A4D ;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling perw v0.0.1-prerelease (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `Vec<u8>: io::Writer` is not satisfied
[INFO] [stdout]    --> src/pe/dos.rs:139:31
[INFO] [stdout]     |
[INFO] [stdout] 139 |         expected_dos.write_to(&mut dos_bytes);
[INFO] [stdout]     |                      -------- ^^^^^^^^^^^^^^ the trait `io::Writer` is not implemented for `Vec<u8>`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout] help: the following other types implement trait `io::Writer`
[INFO] [stdout]    --> src/io/stream.rs:39:1
[INFO] [stdout]     |
[INFO] [stdout]  39 | impl Writer for PEStream<&mut [u8]> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `stream::PEStream<&mut [u8]>`
[INFO] [stdout] ...
[INFO] [stdout]  51 | impl Writer for PEStream<Vec<u8>> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `stream::PEStream<Vec<u8>>`
[INFO] [stdout] note: required by a bound in `io::WriteData::write_to`
[INFO] [stdout]    --> src/io/mod.rs:43:42
[INFO] [stdout]     |
[INFO] [stdout]  43 |     fn write_to(&self, writer: &mut impl Writer) -> Result<()>;
[INFO] [stdout]     |                                          ^^^^^^ required by this bound in `WriteData::write_to`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `perw` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c186b7ec8bdc8d01409d819bb2692e2fd8d9cf7837a122a8c644fb6a594daaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c186b7ec8bdc8d01409d819bb2692e2fd8d9cf7837a122a8c644fb6a594daaf5", kill_on_drop: false }`
[INFO] [stdout] c186b7ec8bdc8d01409d819bb2692e2fd8d9cf7837a122a8c644fb6a594daaf5
