[INFO] fetching crate numbat-codec 0.0.17... [INFO] checking numbat-codec-0.0.17 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate numbat-codec 0.0.17 into /workspace/builds/worker-0-tc2/source [INFO] started tweaking crates.io crate numbat-codec 0.0.17 [INFO] finished tweaking crates.io crate numbat-codec 0.0.17 [INFO] tweaked toml for crates.io crate numbat-codec 0.0.17 written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate numbat-codec 0.0.17 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] Updating crates.io index [INFO] [stderr] Locking 14 packages to latest compatible versions [INFO] [stderr] Adding arrayvec v0.7.1 (available: v0.7.6) [INFO] [stderr] Adding libc v0.2.64 (available: v0.2.177) [INFO] [stderr] Adding numbat-codec-derive v0.0.17 (available: v0.0.19) [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] fab22247a35ab11fbff0b0ccfa8df35526502965f76e803d11017962f7dde553 [INFO] running `Command { std: "docker" "start" "-a" "fab22247a35ab11fbff0b0ccfa8df35526502965f76e803d11017962f7dde553", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fab22247a35ab11fbff0b0ccfa8df35526502965f76e803d11017962f7dde553", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fab22247a35ab11fbff0b0ccfa8df35526502965f76e803d11017962f7dde553", kill_on_drop: false }` [INFO] [stdout] fab22247a35ab11fbff0b0ccfa8df35526502965f76e803d11017962f7dde553 [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] 41dbee2f2c6d12ee04f82304a01cfa04ea735b1aa036dc19e14b2920c05531e9 [INFO] running `Command { std: "docker" "start" "-a" "41dbee2f2c6d12ee04f82304a01cfa04ea735b1aa036dc19e14b2920c05531e9", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.64 [INFO] [stderr] Compiling wee_alloc v0.4.5 [INFO] [stderr] Checking memory_units v0.4.0 [INFO] [stderr] Checking arrayvec v0.7.1 [INFO] [stderr] Compiling syn v1.0.109 [INFO] [stderr] Checking numbat-codec v0.0.17 (/opt/rustwide/workdir) [INFO] [stderr] Compiling numbat-codec-derive v0.0.17 [INFO] [stdout] warning: method `simple_function` is never used [INFO] [stdout] --> tests/derive_struct_with_generic_test.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | trait SimpleTrait { [INFO] [stdout] | ----------- method in this trait [INFO] [stdout] 13 | fn simple_function(&self); [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, !> [INFO] [stdout] --> src/impl_for_types/impl_array_vec.rs:105:17 [INFO] [stdout] | [INFO] [stdout] 105 | let _ = >::top_decode_or_handle_err(TOP_BYTES, PanicErrorHandler); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>, !> [INFO] [stdout] --> src/impl_for_types/impl_array_vec.rs:124:13 [INFO] [stdout] | [INFO] [stdout] 124 | Option::>::top_decode_or_handle_err(NESTED_BYTES, PanicErrorHandler); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `numbat-codec` (lib test) due to 2 previous errors [INFO] running `Command { std: "docker" "inspect" "41dbee2f2c6d12ee04f82304a01cfa04ea735b1aa036dc19e14b2920c05531e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "41dbee2f2c6d12ee04f82304a01cfa04ea735b1aa036dc19e14b2920c05531e9", kill_on_drop: false }` [INFO] [stdout] 41dbee2f2c6d12ee04f82304a01cfa04ea735b1aa036dc19e14b2920c05531e9