[INFO] fetching crate bits 0.0.4...
[INFO] testing bits-0.0.4 against 1.49.0 for beta-1.50-1
[INFO] extracting crate bits 0.0.4 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate bits 0.0.4 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bits 0.0.4
[INFO] finished tweaking crates.io crate bits 0.0.4
[INFO] tweaked toml for crates.io crate bits 0.0.4 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e383d0514f990316e32f2c555174bbec827fa500ab5351508a554b84c9fb2227
[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" "e383d0514f990316e32f2c555174bbec827fa500ab5351508a554b84c9fb2227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e383d0514f990316e32f2c555174bbec827fa500ab5351508a554b84c9fb2227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e383d0514f990316e32f2c555174bbec827fa500ab5351508a554b84c9fb2227", kill_on_drop: false }`
[INFO] [stdout] e383d0514f990316e32f2c555174bbec827fa500ab5351508a554b84c9fb2227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3149c1308e6c93fd9a5d19b8fadc98058cd56ab6e5ac0c35172265fafcab31e6
[INFO] running `Command { std: "docker" "start" "-a" "3149c1308e6c93fd9a5d19b8fadc98058cd56ab6e5ac0c35172265fafcab31e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling bits v0.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `unsigned_negation` has been removed: `replaced by negate_unsigned feature gate`
[INFO] [stdout]   --> src/generic.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |     #[allow(unsigned_negation)]
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `unsigned_negation` has been removed: `replaced by negate_unsigned feature gate`
[INFO] [stdout]   --> src/x86.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |         #[allow(unsigned_negation)]
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Int` in module `num`
[INFO] [stdout]  --> src/generic.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait BitOps: num::Int {
[INFO] [stdout]   |                        ^^^ not found in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Int` in module `num`
[INFO] [stdout]    --> src/generic.rs:254:14
[INFO] [stdout]     |
[INFO] [stdout] 254 | impl<T: num::Int> BitOps for T {}
[INFO] [stdout]     |              ^^^ not found in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(core)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0405, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0405`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bits`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "3149c1308e6c93fd9a5d19b8fadc98058cd56ab6e5ac0c35172265fafcab31e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3149c1308e6c93fd9a5d19b8fadc98058cd56ab6e5ac0c35172265fafcab31e6", kill_on_drop: false }`
[INFO] [stdout] 3149c1308e6c93fd9a5d19b8fadc98058cd56ab6e5ac0c35172265fafcab31e6