[INFO] fetching crate deforest 0.3.2...
[INFO] checking deforest-0.3.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate deforest 0.3.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate deforest 0.3.2
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate deforest 0.3.2
[INFO] tweaked toml for crates.io crate deforest 0.3.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate deforest 0.3.2 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 deforest 0.3.2 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 57479750704cbf36b11375dd0b42ce18935cebb1aee8c404f5fb22e1c2414ef5
[INFO] running `Command { std: "docker" "start" "-a" "57479750704cbf36b11375dd0b42ce18935cebb1aee8c404f5fb22e1c2414ef5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57479750704cbf36b11375dd0b42ce18935cebb1aee8c404f5fb22e1c2414ef5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57479750704cbf36b11375dd0b42ce18935cebb1aee8c404f5fb22e1c2414ef5", kill_on_drop: false }`
[INFO] [stdout] 57479750704cbf36b11375dd0b42ce18935cebb1aee8c404f5fb22e1c2414ef5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c015890bc79afb31ea4ebbe1a6eb6549611bd6416a74778e9cf678fb9b02242e
[INFO] running `Command { std: "docker" "start" "-a" "c015890bc79afb31ea4ebbe1a6eb6549611bd6416a74778e9cf678fb9b02242e", kill_on_drop: false }`
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking ascii v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.43
[INFO] [stderr]    Compiling zerocopy-derive v0.7.32
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking deforest v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: core::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/blob/token.rs:166:16
[INFO] [stdout]     |
[INFO] [stdout] 166 |                     let len = DtUint::try_from(u32::from_be(header.len))
[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 `deforest` (lib) 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: core::result::Result<u32, Infallible>
[INFO] [stdout]    --> src/blob/token.rs:166:16
[INFO] [stdout]     |
[INFO] [stdout] 166 |                     let len = DtUint::try_from(u32::from_be(header.len))
[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 `deforest` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c015890bc79afb31ea4ebbe1a6eb6549611bd6416a74778e9cf678fb9b02242e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c015890bc79afb31ea4ebbe1a6eb6549611bd6416a74778e9cf678fb9b02242e", kill_on_drop: false }`
[INFO] [stdout] c015890bc79afb31ea4ebbe1a6eb6549611bd6416a74778e9cf678fb9b02242e
