[INFO] fetching crate messagepack-core 0.2.0...
[INFO] checking messagepack-core-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate messagepack-core 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate messagepack-core 0.2.0
[INFO] finished tweaking crates.io crate messagepack-core 0.2.0
[INFO] tweaked toml for crates.io crate messagepack-core 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate messagepack-core 0.2.0 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] crate crates.io crate messagepack-core 0.2.0 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d3d1781c06843b04827feea910624fa62cdaa0e481dc278363629eba2e202ec7
[INFO] running `Command { std: "docker" "start" "-a" "d3d1781c06843b04827feea910624fa62cdaa0e481dc278363629eba2e202ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3d1781c06843b04827feea910624fa62cdaa0e481dc278363629eba2e202ec7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3d1781c06843b04827feea910624fa62cdaa0e481dc278363629eba2e202ec7", kill_on_drop: false }`
[INFO] [stdout] d3d1781c06843b04827feea910624fa62cdaa0e481dc278363629eba2e202ec7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d51c9d79bcb03dfdcde85759694ca1fc10d79152c14df8efb3415ab466addc3d
[INFO] running `Command { std: "docker" "start" "-a" "d51c9d79bcb03dfdcde85759694ca1fc10d79152c14df8efb3415ab466addc3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling semver v1.0.25
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling winnow v0.7.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling rstest_macros v0.26.1
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]     Checking messagepack-core v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<usize, Infallible>
[INFO] [stdout]    --> src/decode/mod.rs:181:17
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 usize::try_from(<$ty>::from_be_bytes(data)).map_err(|_| Error::InvalidData)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 188 |     impl_read! {u8}
[INFO] [stdout]     |     --------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]     = note: this error originates in the macro `impl_read` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<usize, Infallible>
[INFO] [stdout]    --> src/decode/mod.rs:181:17
[INFO] [stdout]     |
[INFO] [stdout] 181 |                 usize::try_from(<$ty>::from_be_bytes(data)).map_err(|_| Error::InvalidData)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |     impl_read! {u16}
[INFO] [stdout]     |     ---------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_read` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `messagepack-core` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d51c9d79bcb03dfdcde85759694ca1fc10d79152c14df8efb3415ab466addc3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d51c9d79bcb03dfdcde85759694ca1fc10d79152c14df8efb3415ab466addc3d", kill_on_drop: false }`
[INFO] [stdout] d51c9d79bcb03dfdcde85759694ca1fc10d79152c14df8efb3415ab466addc3d