[INFO] fetching crate strdeser 0.1.0...
[INFO] checking strdeser-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate strdeser 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate strdeser 0.1.0
[INFO] finished tweaking crates.io crate strdeser 0.1.0
[INFO] tweaked toml for crates.io crate strdeser 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate strdeser 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1b348d562e30d2d5d9e9760eeffe06e9725ff1723e66854882c920015b5d52bc
[INFO] running `Command { std: "docker" "start" "-a" "1b348d562e30d2d5d9e9760eeffe06e9725ff1723e66854882c920015b5d52bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b348d562e30d2d5d9e9760eeffe06e9725ff1723e66854882c920015b5d52bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b348d562e30d2d5d9e9760eeffe06e9725ff1723e66854882c920015b5d52bc", kill_on_drop: false }`
[INFO] [stdout] 1b348d562e30d2d5d9e9760eeffe06e9725ff1723e66854882c920015b5d52bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5b8af0c3f4648eef863ca4456e192a35727df2abe50b0ff707d3cf72d4806305
[INFO] running `Command { std: "docker" "start" "-a" "5b8af0c3f4648eef863ca4456e192a35727df2abe50b0ff707d3cf72d4806305", kill_on_drop: false }`
[INFO] [stderr]    Compiling strdesermac v0.1.0
[INFO] [stderr]     Checking strdeser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `strdesermac::DeserializeStruct`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use strdesermac::DeserializeStruct;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/lib.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 |         #[derive(DeserializeStruct)]
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `DeserializeStruct` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strdeser` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5b8af0c3f4648eef863ca4456e192a35727df2abe50b0ff707d3cf72d4806305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b8af0c3f4648eef863ca4456e192a35727df2abe50b0ff707d3cf72d4806305", kill_on_drop: false }`
[INFO] [stdout] 5b8af0c3f4648eef863ca4456e192a35727df2abe50b0ff707d3cf72d4806305