[INFO] fetching crate rlwe 0.1.0...
[INFO] testing rlwe-0.1.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate rlwe 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rlwe 0.1.0
[INFO] finished tweaking crates.io crate rlwe 0.1.0
[INFO] tweaked toml for crates.io crate rlwe 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rlwe 0.1.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v1.2.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f25aaa8a0e5e78a4834cd2b0c63080e03daa35e748d546414cd0645d0fe900d
[INFO] running `Command { std: "docker" "start" "-a" "7f25aaa8a0e5e78a4834cd2b0c63080e03daa35e748d546414cd0645d0fe900d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f25aaa8a0e5e78a4834cd2b0c63080e03daa35e748d546414cd0645d0fe900d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f25aaa8a0e5e78a4834cd2b0c63080e03daa35e748d546414cd0645d0fe900d", kill_on_drop: false }`
[INFO] [stdout] 7f25aaa8a0e5e78a4834cd2b0c63080e03daa35e748d546414cd0645d0fe900d
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ff4a7969ca8d9e53a54d3fca4a9288c92d40c7c5b8879e2befbbc0d07eb867b
[INFO] running `Command { std: "docker" "start" "-a" "3ff4a7969ca8d9e53a54d3fca4a9288c92d40c7c5b8879e2befbbc0d07eb867b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling rlwe v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]   --> src/traits.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     #[must_use]
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:1:9
[INFO] [stdout]    |
[INFO] [stdout]  1 | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_attributes)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rlwe` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3ff4a7969ca8d9e53a54d3fca4a9288c92d40c7c5b8879e2befbbc0d07eb867b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ff4a7969ca8d9e53a54d3fca4a9288c92d40c7c5b8879e2befbbc0d07eb867b", kill_on_drop: false }`
[INFO] [stdout] 3ff4a7969ca8d9e53a54d3fca4a9288c92d40c7c5b8879e2befbbc0d07eb867b