[INFO] fetching crate ketos 0.12.0...
[INFO] checking ketos-0.12.0 against master#158f00a1c5175648af6f6099b075f78d1d014a28 for pr-121251
[INFO] extracting crate ketos 0.12.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate ketos 0.12.0 on toolchain 158f00a1c5175648af6f6099b075f78d1d014a28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ketos 0.12.0
[INFO] finished tweaking crates.io crate ketos 0.12.0
[INFO] tweaked toml for crates.io crate ketos 0.12.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate ketos 0.12.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded constant_time_eq v0.1.4
[INFO] [stderr]   Downloaded rust-argon2 v0.5.1
[INFO] [stderr]   Downloaded ketos_derive v0.12.0
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[INFO] [stderr]   Downloaded redox_users v0.3.1
[INFO] [stderr]   Downloaded blake2b_simd v0.5.9
[INFO] [stderr]   Downloaded gumdrop_derive v0.7.0
[INFO] [stderr]   Downloaded num-iter v0.1.39
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[INFO] [stderr]   Downloaded gumdrop v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1dcccbf4a3326c8c4369b9cbfd456514acc9999fe7ba83121bf1043eb6ced387
[INFO] running `Command { std: "docker" "start" "-a" "1dcccbf4a3326c8c4369b9cbfd456514acc9999fe7ba83121bf1043eb6ced387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1dcccbf4a3326c8c4369b9cbfd456514acc9999fe7ba83121bf1043eb6ced387", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dcccbf4a3326c8c4369b9cbfd456514acc9999fe7ba83121bf1043eb6ced387", kill_on_drop: false }`
[INFO] [stdout] 1dcccbf4a3326c8c4369b9cbfd456514acc9999fe7ba83121bf1043eb6ced387
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04e90238808bb0e1d6830156b0b8818083e1e67405f97e6d101788edf9026a00
[INFO] running `Command { std: "docker" "start" "-a" "04e90238808bb0e1d6830156b0b8818083e1e67405f97e6d101788edf9026a00", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling rand_core v0.4.2
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[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
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[INFO] [stderr]     Checking c2-chacha v0.2.3
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[INFO] [stderr]    Compiling terminfo v0.6.1
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[INFO] [stderr]    Compiling gumdrop_derive v0.7.0
[INFO] [stderr]    Compiling ketos_derive v0.12.0
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[INFO] [stderr]     Checking ketos v0.12.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/any.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let b = SomeTrait::downcast::<Dumber>(a).unwrap_err();
[INFO] [stdout]     |                 ^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let b = <dyn SomeTrait>::downcast::<Dumber>(a).unwrap_err();
[INFO] [stdout]     |                 ++++          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/any.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let c = SomeTrait::downcast::<Dummy>(b).unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let c = <dyn SomeTrait>::downcast::<Dummy>(b).unwrap();
[INFO] [stdout]     |                 ++++          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/any.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let b = SomeTrait::downcast_rc::<Dumber>(a).unwrap_err();
[INFO] [stdout]     |                 ^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 112 |         let b = <dyn SomeTrait>::downcast_rc::<Dumber>(a).unwrap_err();
[INFO] [stdout]     |                 ++++          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/any.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let c = SomeTrait::downcast_rc::<Dummy>(b).unwrap();
[INFO] [stdout]     |                 ^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 113 |         let c = <dyn SomeTrait>::downcast_rc::<Dummy>(b).unwrap();
[INFO] [stdout]     |                 ++++          +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/structs.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 ForeignValue::downcast_rc::<T>(fv)
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 <dyn ForeignValue>::downcast_rc::<T>(fv)
[INFO] [stdout]     |                 ++++             +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/ketos/structs.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 ForeignValue::downcast_rc::<T>(fv)
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[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 <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 <dyn ForeignValue>::downcast_rc::<T>(fv)
[INFO] [stdout]     |                 ++++             +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ketos/compile.rs:333:9
[INFO] [stdout]     |
[INFO] [stdout] 333 |         replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 333 |         let _ = replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/ketos/compile.rs:333:9
[INFO] [stdout]     |
[INFO] [stdout] 333 |         replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 333 |         let _ = replace(&mut self.blocks, new_blocks);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> tests/test_derive.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct NoClone(&'static str);
[INFO] [stdout]   |        ------- ^^^^^^^^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `NoClone` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct NoClone(());
[INFO] [stdout]   |                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/test_derive.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Cloner(&'static str);
[INFO] [stdout]    |        ------ ^^^^^^^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Cloner` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Cloner(());
[INFO] [stdout]    |               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.09s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3, terminfo v0.6.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "04e90238808bb0e1d6830156b0b8818083e1e67405f97e6d101788edf9026a00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04e90238808bb0e1d6830156b0b8818083e1e67405f97e6d101788edf9026a00", kill_on_drop: false }`
[INFO] [stdout] 04e90238808bb0e1d6830156b0b8818083e1e67405f97e6d101788edf9026a00
