[INFO] fetching crate wav 1.0.0...
[INFO] checking wav-1.0.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate wav 1.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate wav 1.0.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wav 1.0.0
[INFO] finished tweaking crates.io crate wav 1.0.0
[INFO] tweaked toml for crates.io crate wav 1.0.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages
[INFO] [stderr]       Adding riff v1.0.1 (latest: v2.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded riff v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a58581cd6f93fbfffae92965b8033fdcc2c84c8dca98a2a003a4524a59e0b305
[INFO] running `Command { std: "docker" "start" "-a" "a58581cd6f93fbfffae92965b8033fdcc2c84c8dca98a2a003a4524a59e0b305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a58581cd6f93fbfffae92965b8033fdcc2c84c8dca98a2a003a4524a59e0b305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a58581cd6f93fbfffae92965b8033fdcc2c84c8dca98a2a003a4524a59e0b305", kill_on_drop: false }`
[INFO] [stdout] a58581cd6f93fbfffae92965b8033fdcc2c84c8dca98a2a003a4524a59e0b305
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f945d7507c27196555faea08c3157afaee77f7dc69072fe6dedbd8a5bbbb9155
[INFO] running `Command { std: "docker" "start" "-a" "f945d7507c27196555faea08c3157afaee77f7dc69072fe6dedbd8a5bbbb9155", kill_on_drop: false }`
[INFO] [stderr]     Checking riff v1.0.1
[INFO] [stderr]     Checking wav v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cell::Cell`
[INFO] [stdout]  --> benches/bench.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cell::Cell, fs::File};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bit_depth::BitDepth`, `header::Header`, `write`
[INFO] [stdout]  --> benches/bench.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use wav::{bit_depth::BitDepth, header::Header, read, write};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "f945d7507c27196555faea08c3157afaee77f7dc69072fe6dedbd8a5bbbb9155", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f945d7507c27196555faea08c3157afaee77f7dc69072fe6dedbd8a5bbbb9155", kill_on_drop: false }`
[INFO] [stdout] f945d7507c27196555faea08c3157afaee77f7dc69072fe6dedbd8a5bbbb9155
[INFO] checking wav-1.0.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate wav 1.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate wav 1.0.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wav 1.0.0
[INFO] finished tweaking crates.io crate wav 1.0.0
[INFO] tweaked toml for crates.io crate wav 1.0.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9ecb9310fbc1e800ee39bdac56bf647b52f97b7984771a067e7fdd8e5c62034
[INFO] running `Command { std: "docker" "start" "-a" "b9ecb9310fbc1e800ee39bdac56bf647b52f97b7984771a067e7fdd8e5c62034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9ecb9310fbc1e800ee39bdac56bf647b52f97b7984771a067e7fdd8e5c62034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9ecb9310fbc1e800ee39bdac56bf647b52f97b7984771a067e7fdd8e5c62034", kill_on_drop: false }`
[INFO] [stdout] b9ecb9310fbc1e800ee39bdac56bf647b52f97b7984771a067e7fdd8e5c62034
[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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e718a3fa0c9e629730d9ebd136902b24ffa12cdcbf1c63ecd6edd6c41ec40aa7
[INFO] running `Command { std: "docker" "start" "-a" "e718a3fa0c9e629730d9ebd136902b24ffa12cdcbf1c63ecd6edd6c41ec40aa7", kill_on_drop: false }`
[INFO] [stderr]     Checking riff v1.0.1
[INFO] [stderr]     Checking wav v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cell::Cell`
[INFO] [stdout]  --> benches/bench.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cell::Cell, fs::File};
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `bit_depth::BitDepth`, `header::Header`, `write`
[INFO] [stdout]  --> benches/bench.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use wav::{bit_depth::BitDepth, header::Header, read, write};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "e718a3fa0c9e629730d9ebd136902b24ffa12cdcbf1c63ecd6edd6c41ec40aa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e718a3fa0c9e629730d9ebd136902b24ffa12cdcbf1c63ecd6edd6c41ec40aa7", kill_on_drop: false }`
[INFO] [stdout] e718a3fa0c9e629730d9ebd136902b24ffa12cdcbf1c63ecd6edd6c41ec40aa7