[INFO] fetching crate easy-jsonrpc 0.5.3...
[INFO] checking easy-jsonrpc-0.5.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate easy-jsonrpc 0.5.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate easy-jsonrpc 0.5.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy-jsonrpc 0.5.3
[INFO] finished tweaking crates.io crate easy-jsonrpc 0.5.3
[INFO] tweaked toml for crates.io crate easy-jsonrpc 0.5.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate easy-jsonrpc 0.5.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] cff203f16af2d6ecd8288a4485785df0cb57658227ceac857e87b2f64ade01e0
[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" "cff203f16af2d6ecd8288a4485785df0cb57658227ceac857e87b2f64ade01e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cff203f16af2d6ecd8288a4485785df0cb57658227ceac857e87b2f64ade01e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cff203f16af2d6ecd8288a4485785df0cb57658227ceac857e87b2f64ade01e0", kill_on_drop: false }`
[INFO] [stdout] cff203f16af2d6ecd8288a4485785df0cb57658227ceac857e87b2f64ade01e0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bca948fe74994977fa05ec5fa6477a22d4f4e075c9539b239543eabddbc073f
[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" "7bca948fe74994977fa05ec5fa6477a22d4f4e075c9539b239543eabddbc073f", kill_on_drop: false }`
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[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `dyn FrobMachine`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/common/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait FrobMachine: Sync + Send {
[INFO] [stdout]   |           ^^^^^^^^^^^ help: use `dyn`: `<dyn FrobMachine>`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:676:15
[INFO] [stdout]     |
[INFO] [stdout] 676 |     pub trait Adder {
[INFO] [stdout]     |               ^^^^^ help: use `dyn`: `dyn Adder`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:676:15
[INFO] [stdout]     |
[INFO] [stdout] 676 |     pub trait Adder {
[INFO] [stdout]     |               ^^^^^ help: use `dyn`: `dyn Adder`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1041:15
[INFO] [stdout]      |
[INFO] [stdout] 1041 |         trait Adder {
[INFO] [stdout]      |               ^^^^^ help: use `dyn`: `dyn Adder`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1094:15
[INFO] [stdout]      |
[INFO] [stdout] 1094 |         trait Adder {
[INFO] [stdout]      |               ^^^^^ help: use `dyn`: `dyn Adder`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1170:15
[INFO] [stdout]      |
[INFO] [stdout] 1170 |         trait Bar {
[INFO] [stdout]      |               ^^^ help: use `dyn`: `dyn Bar`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:676:15
[INFO] [stdout]     |
[INFO] [stdout] 676 |     pub trait Adder {
[INFO] [stdout]     |               ^^^^^ help: use `dyn`: `<dyn Adder>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1041:15
[INFO] [stdout]      |
[INFO] [stdout] 1041 |         trait Adder {
[INFO] [stdout]      |               ^^^^^ help: use `dyn`: `<dyn Adder>`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1094:15
[INFO] [stdout]      |
[INFO] [stdout] 1094 |         trait Adder {
[INFO] [stdout]      |               ^^^^^ help: use `dyn`: `<dyn Adder>`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[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/lib.rs:1170:15
[INFO] [stdout]      |
[INFO] [stdout] 1170 |         trait Bar {
[INFO] [stdout]      |               ^^^ help: use `dyn`: `<dyn Bar>`
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
[INFO] running `Command { std: "docker" "inspect" "7bca948fe74994977fa05ec5fa6477a22d4f4e075c9539b239543eabddbc073f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bca948fe74994977fa05ec5fa6477a22d4f4e075c9539b239543eabddbc073f", kill_on_drop: false }`
[INFO] [stdout] 7bca948fe74994977fa05ec5fa6477a22d4f4e075c9539b239543eabddbc073f
