[INFO] fetching crate yansi 0.5.0...
[INFO] testing yansi-0.5.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate yansi 0.5.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate yansi 0.5.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate yansi 0.5.0
[INFO] finished tweaking crates.io crate yansi 0.5.0
[INFO] tweaked toml for crates.io crate yansi 0.5.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 094bbc220057872da8d13330ce7bc057bc9134e79ead193cbcc870bd480dabc8
[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" "094bbc220057872da8d13330ce7bc057bc9134e79ead193cbcc870bd480dabc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "094bbc220057872da8d13330ce7bc057bc9134e79ead193cbcc870bd480dabc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "094bbc220057872da8d13330ce7bc057bc9134e79ead193cbcc870bd480dabc8", kill_on_drop: false }`
[INFO] [stdout] 094bbc220057872da8d13330ce7bc057bc9134e79ead193cbcc870bd480dabc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 6ca13e557878e8d7d4c7ae715b09af7529efc01d9d04e5339e04b0138802cf1b
[INFO] running `Command { std: "docker" "start" "-a" "6ca13e557878e8d7d4c7ae715b09af7529efc01d9d04e5339e04b0138802cf1b", kill_on_drop: false }`
[INFO] [stderr]    Compiling yansi v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:185:52
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn write_spliced<T: Display>(c: &mut bool, f: &mut fmt::Write, t: T) -> fmt::Result {
[INFO] [stdout]     |                                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:412:38
[INFO] [stdout]     |
[INFO] [stdout] 412 |     pub fn fmt_prefix(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:474:38
[INFO] [stdout]     |
[INFO] [stdout] 474 |     pub fn fmt_suffix(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/color.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn ascii_fmt(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "6ca13e557878e8d7d4c7ae715b09af7529efc01d9d04e5339e04b0138802cf1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ca13e557878e8d7d4c7ae715b09af7529efc01d9d04e5339e04b0138802cf1b", kill_on_drop: false }`
[INFO] [stdout] 6ca13e557878e8d7d4c7ae715b09af7529efc01d9d04e5339e04b0138802cf1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39b113bf0c2f1eac8f1c94f2f83b569d4fc1d5a446b3f415fa23c82842410082
[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" "39b113bf0c2f1eac8f1c94f2f83b569d4fc1d5a446b3f415fa23c82842410082", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:185:52
[INFO] [stdout]     |
[INFO] [stdout] 185 | fn write_spliced<T: Display>(c: &mut bool, f: &mut fmt::Write, t: T) -> fmt::Result {
[INFO] [stdout]     |                                                    ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:412:38
[INFO] [stdout]     |
[INFO] [stdout] 412 |     pub fn fmt_prefix(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/style.rs:474:38
[INFO] [stdout]     |
[INFO] [stdout] 474 |     pub fn fmt_suffix(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/color.rs:73:44
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub(crate) fn ascii_fmt(&self, f: &mut fmt::Write) -> fmt::Result {
[INFO] [stdout]    |                                            ^^^^^^^^^^ help: use `dyn`: `dyn fmt::Write`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]    = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.14/src/lib.rs:41:60
[INFO] [stdout]    |
[INFO] [stdout] 41 | #![cfg_attr(all(feature = "nightly", target_os = "linux"), feature(integer_atomics))]
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parking_lot_core`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "39b113bf0c2f1eac8f1c94f2f83b569d4fc1d5a446b3f415fa23c82842410082", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39b113bf0c2f1eac8f1c94f2f83b569d4fc1d5a446b3f415fa23c82842410082", kill_on_drop: false }`
[INFO] [stdout] 39b113bf0c2f1eac8f1c94f2f83b569d4fc1d5a446b3f415fa23c82842410082
