[INFO] fetching crate rain_task 0.4.0...
[INFO] checking rain_task-0.4.0 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate rain_task 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rain_task 0.4.0 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rain_task 0.4.0
[INFO] finished tweaking crates.io crate rain_task 0.4.0
[INFO] tweaked toml for crates.io crate rain_task 0.4.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded capnp-futures v0.1.1
[INFO] [stderr]   Downloaded capnpc v0.8.9
[INFO] [stderr]   Downloaded capnp v0.8.17
[INFO] [stderr]   Downloaded capnp-rpc v0.8.3
[INFO] [stderr]   Downloaded rain_core v0.4.0
[INFO] [stderr]   Downloaded serde_cbor v0.8.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcc81b21add9cfdc29a880daebbc934a58534d7f633a07277881d1a5a6f0666b
[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" "dcc81b21add9cfdc29a880daebbc934a58534d7f633a07277881d1a5a6f0666b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcc81b21add9cfdc29a880daebbc934a58534d7f633a07277881d1a5a6f0666b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc81b21add9cfdc29a880daebbc934a58534d7f633a07277881d1a5a6f0666b", kill_on_drop: false }`
[INFO] [stdout] dcc81b21add9cfdc29a880daebbc934a58534d7f633a07277881d1a5a6f0666b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a2c3e1dbfc569fb83de0c1263ce4d17134620fff7862683bfcbac1391f2cbdf
[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" "8a2c3e1dbfc569fb83de0c1263ce4d17134620fff7862683bfcbac1391f2cbdf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling futures v0.1.30
[INFO] [stderr]     Checking capnp v0.8.17
[INFO] [stderr]    Compiling libsqlite3-sys v0.9.3
[INFO] [stderr]     Checking serde_cbor v0.8.2
[INFO] [stderr]     Checking serde_bytes v0.10.5
[INFO] [stderr]     Checking memmap v0.6.2
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking rusqlite v0.14.0
[INFO] [stderr]     Checking capnp-futures v0.1.1
[INFO] [stderr]    Compiling capnpc v0.8.9
[INFO] [stderr]    Compiling capnp-rpc v0.8.3
[INFO] [stderr]    Compiling rain_core v0.4.0
[INFO] [stderr]     Checking rain_task v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/errors.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// The internal error type
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/executor.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type TaskFn = Fn(&mut Context, &[DataInstance], &mut [Output]) -> TaskResult<()> + Send + Sync;
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Context, &[DataInstance], &mut [Output]) -> TaskResult<()> + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | / error_chain!{
[INFO] [stdout] 7  | |     types {
[INFO] [stdout] 8  | |         Error, ErrorKind, ResultExt;
[INFO] [stdout] 9  | |     }
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     }
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/errors.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// The internal error type
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/executor.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type TaskFn = Fn(&mut Context, &[DataInstance], &mut [Output]) -> TaskResult<()> + Send + Sync;
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Context, &[DataInstance], &mut [Output]) -> TaskResult<()> + Send + Sync`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | / error_chain!{
[INFO] [stdout] 7  | |     types {
[INFO] [stdout] 8  | |         Error, ErrorKind, ResultExt;
[INFO] [stdout] 9  | |     }
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     }
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/errors.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | / error_chain!{
[INFO] [stdout] 7  | |     types {
[INFO] [stdout] 8  | |         Error, ErrorKind, ResultExt;
[INFO] [stdout] 9  | |     }
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     }
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/executor.rs:217:25
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     for mut o in context.outputs.iter_mut() {
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/errors.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | / error_chain!{
[INFO] [stdout] 7  | |     types {
[INFO] [stdout] 8  | |         Error, ErrorKind, ResultExt;
[INFO] [stdout] 9  | |     }
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     }
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/executor.rs:217:25
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     for mut o in context.outputs.iter_mut() {
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.70s
[INFO] running `Command { std: "docker" "inspect" "8a2c3e1dbfc569fb83de0c1263ce4d17134620fff7862683bfcbac1391f2cbdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a2c3e1dbfc569fb83de0c1263ce4d17134620fff7862683bfcbac1391f2cbdf", kill_on_drop: false }`
[INFO] [stdout] 8a2c3e1dbfc569fb83de0c1263ce4d17134620fff7862683bfcbac1391f2cbdf