[INFO] fetching crate twang 0.2.0...
[INFO] checking twang-0.2.0 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate twang 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate twang 0.2.0 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate twang 0.2.0
[INFO] finished tweaking crates.io crate twang 0.2.0
[INFO] tweaked toml for crates.io crate twang 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded adi_speaker v0.0.1
[INFO] [stderr]   Downloaded adi v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9fc703659dae01ffbf2bdff37e26097f1a9588b2a6976ba3ff44c8cfae9edff5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9fc703659dae01ffbf2bdff37e26097f1a9588b2a6976ba3ff44c8cfae9edff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fc703659dae01ffbf2bdff37e26097f1a9588b2a6976ba3ff44c8cfae9edff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fc703659dae01ffbf2bdff37e26097f1a9588b2a6976ba3ff44c8cfae9edff5", kill_on_drop: false }`
[INFO] [stdout] 9fc703659dae01ffbf2bdff37e26097f1a9588b2a6976ba3ff44c8cfae9edff5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abc35bb8a7ddaa0ef495e5ce02398977c3d871f9e86e5dacb48abea9813ea5e2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "abc35bb8a7ddaa0ef495e5ce02398977c3d871f9e86e5dacb48abea9813ea5e2", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking twang v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `core::num::<impl u8>::wrapping_add` that must be used
[INFO] [stdout]    --> src/pink.rs:278:5
[INFO] [stdout]     |
[INFO] [stdout] 278 |                 self.pncnt.wrapping_add(1);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the result of the operation, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking adi_speaker v0.0.1
[INFO] [stderr]     Checking adi v0.12.0
[INFO] [stdout] warning: unused return value of `core::num::<impl u8>::wrapping_add` that must be used
[INFO] [stdout]    --> src/pink.rs:278:5
[INFO] [stdout]     |
[INFO] [stdout] 278 |                 self.pncnt.wrapping_add(1);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this returns the result of the operation, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.41s
[INFO] running `Command { std: "docker" "inspect" "abc35bb8a7ddaa0ef495e5ce02398977c3d871f9e86e5dacb48abea9813ea5e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc35bb8a7ddaa0ef495e5ce02398977c3d871f9e86e5dacb48abea9813ea5e2", kill_on_drop: false }`
[INFO] [stdout] abc35bb8a7ddaa0ef495e5ce02398977c3d871f9e86e5dacb48abea9813ea5e2