[INFO] fetching crate zest 0.0.2...
[INFO] checking zest-0.0.2 against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] extracting crate zest 0.0.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate zest 0.0.2
[INFO] finished tweaking crates.io crate zest 0.0.2
[INFO] tweaked toml for crates.io crate zest 0.0.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate zest 0.0.2 on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate zest 0.0.2 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: file `/workspace/builds/worker-2-tc2/source/examples/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `bin` target `zest`
[INFO] [stderr]   * `example` target `main`
[INFO] [stderr] warning: `zest` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5b1cb2451a627b05b1e1d550e7bbb2523da7ab3fc2d9ead37b7822e5da9b64e
[INFO] running `Command { std: "docker" "start" "-a" "b5b1cb2451a627b05b1e1d550e7bbb2523da7ab3fc2d9ead37b7822e5da9b64e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5b1cb2451a627b05b1e1d550e7bbb2523da7ab3fc2d9ead37b7822e5da9b64e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5b1cb2451a627b05b1e1d550e7bbb2523da7ab3fc2d9ead37b7822e5da9b64e", kill_on_drop: false }`
[INFO] [stdout] b5b1cb2451a627b05b1e1d550e7bbb2523da7ab3fc2d9ead37b7822e5da9b64e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98fa62fb1ced2c1e283d56723302df7a4d3fb51b3c51021bf7458cec13fe95cc
[INFO] running `Command { std: "docker" "start" "-a" "98fa62fb1ced2c1e283d56723302df7a4d3fb51b3c51021bf7458cec13fe95cc", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: file `/opt/rustwide/workdir/examples/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `bin` target `zest`
[INFO] [stderr]   * `example` target `main`
[INFO] [stderr] warning: `zest` (manifest) generated 1 warning
[INFO] [stderr]     Checking zest v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `ZipFile` is never constructed
[INFO] [stdout]   --> src/pkzip.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct ZipFile {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `ZipFile` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `ZipFile` is never constructed
[INFO] [stdout]   --> src/pkzip.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub struct ZipFile {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `ZipFile` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zest` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `zest` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "98fa62fb1ced2c1e283d56723302df7a4d3fb51b3c51021bf7458cec13fe95cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98fa62fb1ced2c1e283d56723302df7a4d3fb51b3c51021bf7458cec13fe95cc", kill_on_drop: false }`
[INFO] [stdout] 98fa62fb1ced2c1e283d56723302df7a4d3fb51b3c51021bf7458cec13fe95cc
