[INFO] fetching crate markdown_splitter 0.1.1...
[INFO] checking markdown_splitter-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate markdown_splitter 0.1.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate markdown_splitter 0.1.1
[INFO] finished tweaking crates.io crate markdown_splitter 0.1.1
[INFO] tweaked toml for crates.io crate markdown_splitter 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate markdown_splitter 0.1.1 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate markdown_splitter 0.1.1 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d294f9cdef40faa7b5efc5f6636d1fbd8db63cfd5211e270407abf6a387ac39b
[INFO] running `Command { std: "docker" "start" "-a" "d294f9cdef40faa7b5efc5f6636d1fbd8db63cfd5211e270407abf6a387ac39b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d294f9cdef40faa7b5efc5f6636d1fbd8db63cfd5211e270407abf6a387ac39b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d294f9cdef40faa7b5efc5f6636d1fbd8db63cfd5211e270407abf6a387ac39b", kill_on_drop: false }`
[INFO] [stdout] d294f9cdef40faa7b5efc5f6636d1fbd8db63cfd5211e270407abf6a387ac39b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 358c3ef13209ee893f7a8f48eec06474b0cf492214a7382bc7be75d31d9b2734
[INFO] running `Command { std: "docker" "start" "-a" "358c3ef13209ee893f7a8f48eec06474b0cf492214a7382bc7be75d31d9b2734", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.5
[INFO] [stderr]     Checking structopt v0.3.12
[INFO] [stderr]     Checking markdown_splitter v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:12:42
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let filename_copy = filename.as_ref().clone();
[INFO] [stdout]    |                                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 12 -     let filename_copy = filename.as_ref().clone();
[INFO] [stdout] 12 +     let filename_copy = filename.as_ref();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/lib.rs:12:42
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let filename_copy = filename.as_ref().clone();
[INFO] [stdout]    |                                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Path` does not implement `Clone`, so calling `clone` on `&Path` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 12 -     let filename_copy = filename.as_ref().clone();
[INFO] [stdout] 12 +     let filename_copy = filename.as_ref();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/bin.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     /// Output filename (default: `export.md`)
[INFO] [stdout] 11 | |     #[structopt(short = "o", long = "output", default_value = "export.md")]
[INFO] [stdout] 12 | |     output: std::path::PathBuf,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `markdown_splitter` (bin "mds" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/bin.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     /// Output filename (default: `export.md`)
[INFO] [stdout] 11 | |     #[structopt(short = "o", long = "output", default_value = "export.md")]
[INFO] [stdout] 12 | |     output: std::path::PathBuf,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `markdown_splitter` (bin "mds") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "358c3ef13209ee893f7a8f48eec06474b0cf492214a7382bc7be75d31d9b2734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "358c3ef13209ee893f7a8f48eec06474b0cf492214a7382bc7be75d31d9b2734", kill_on_drop: false }`
[INFO] [stdout] 358c3ef13209ee893f7a8f48eec06474b0cf492214a7382bc7be75d31d9b2734