[INFO] fetching crate chainerror 0.7.0...
[INFO] checking chainerror-0.7.0 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate chainerror 0.7.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate chainerror 0.7.0 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chainerror 0.7.0
[INFO] finished tweaking crates.io crate chainerror 0.7.0
[INFO] tweaked toml for crates.io crate chainerror 0.7.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate chainerror 0.7.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e10b7df11b91c42086ad42bdd193aa0a05fe93d2c69d86cd990f2ee20fa4fac
[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" "8e10b7df11b91c42086ad42bdd193aa0a05fe93d2c69d86cd990f2ee20fa4fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e10b7df11b91c42086ad42bdd193aa0a05fe93d2c69d86cd990f2ee20fa4fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e10b7df11b91c42086ad42bdd193aa0a05fe93d2c69d86cd990f2ee20fa4fac", kill_on_drop: false }`
[INFO] [stdout] 8e10b7df11b91c42086ad42bdd193aa0a05fe93d2c69d86cd990f2ee20fa4fac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--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] 846760aa8d40ebb11a1bac3ac703d1e6ad15d534b1e07eb280561a2ff61e6db2
[INFO] running `Command { std: "docker" "start" "-a" "846760aa8d40ebb11a1bac3ac703d1e6ad15d534b1e07eb280561a2ff61e6db2", kill_on_drop: false }`
[INFO] [stderr]     Checking chainerror v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:201:32
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ^^^^^ help: use `dyn`: `<dyn Error>`
[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/lib.rs:223:25
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ^^^^^ help: use `dyn`: `<dyn Error>`
[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/lib.rs:201:32
[INFO] [stdout]     |
[INFO] [stdout] 201 |         self.iter().filter_map(Error::downcast_ref::<U>).next()
[INFO] [stdout]     |                                ^^^^^ help: use `dyn`: `<dyn Error>`
[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/lib.rs:223:25
[INFO] [stdout]     |
[INFO] [stdout] 223 |             .filter_map(Error::downcast_ref::<ChainError<U>>)
[INFO] [stdout]     |                         ^^^^^ help: use `dyn`: `<dyn Error>`
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/test_iter.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |         .filter_map(Error::downcast_ref::<io::Error>)
[INFO] [stdout]    |                     ^^^^^ help: use `dyn`: `<dyn Error>`
[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]   --> tests/test_iter.rs:91:53
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let io_error: Option<&io::Error> = err.and_then(Error::downcast_ref::<io::Error>);
[INFO] [stdout]    |                                                     ^^^^^ help: use `dyn`: `<dyn Error>`
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "846760aa8d40ebb11a1bac3ac703d1e6ad15d534b1e07eb280561a2ff61e6db2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "846760aa8d40ebb11a1bac3ac703d1e6ad15d534b1e07eb280561a2ff61e6db2", kill_on_drop: false }`
[INFO] [stdout] 846760aa8d40ebb11a1bac3ac703d1e6ad15d534b1e07eb280561a2ff61e6db2