[INFO] fetching crate u32err 0.1.1...
[INFO] testing u32err-0.1.1 against master#ec6f9a5b4413f74386267ef8efc93712c2ce6db6 for pr-155739-1
[INFO] extracting crate u32err 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate u32err 0.1.1
[INFO] finished tweaking crates.io crate u32err 0.1.1
[INFO] tweaked toml for crates.io crate u32err 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate u32err 0.1.1 on toolchain ec6f9a5b4413f74386267ef8efc93712c2ce6db6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ee63110302c3166423d60105e75cc6e62c4902d1a79cf346e15abd2a84dffe2
[INFO] running `Command { std: "docker" "start" "-a" "6ee63110302c3166423d60105e75cc6e62c4902d1a79cf346e15abd2a84dffe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ee63110302c3166423d60105e75cc6e62c4902d1a79cf346e15abd2a84dffe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ee63110302c3166423d60105e75cc6e62c4902d1a79cf346e15abd2a84dffe2", kill_on_drop: false }`
[INFO] [stdout] 6ee63110302c3166423d60105e75cc6e62c4902d1a79cf346e15abd2a84dffe2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ec6f9a5b4413f74386267ef8efc93712c2ce6db6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdf05d62f801cd97b5854b1f9e5b44a9382cd92006846854bea5f1618d55aeed
[INFO] running `Command { std: "docker" "start" "-a" "fdf05d62f801cd97b5854b1f9e5b44a9382cd92006846854bea5f1618d55aeed", kill_on_drop: false }`
[INFO] [stderr]    Compiling u32err v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `ErrCodeResidual: Residual<()>` is not satisfied
[INFO] [stdout]   --> src/lib.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |     type Residual = ErrCodeResidual;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]    |
[INFO] [stdout] help: the nightly-only, unstable trait `Residual<()>` is not implemented for `ErrCodeResidual`
[INFO] [stdout]   --> src/lib.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct ErrCodeResidual(NonZeroU32);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: the following other types implement trait `Residual<O>`
[INFO] [stdout]   --> /rustc/ec6f9a5b4413f74386267ef8efc93712c2ce6db6/library/core/src/result.rs:2205:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Result<Infallible, E>` implements `Residual<T>`
[INFO] [stdout]   --> /rustc/ec6f9a5b4413f74386267ef8efc93712c2ce6db6/library/core/src/option.rs:2810:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Option<Infallible>` implements `Residual<T>`
[INFO] [stdout]   --> /rustc/ec6f9a5b4413f74386267ef8efc93712c2ce6db6/library/core/src/ops/control_flow.rs:138:0
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ControlFlow<B, Infallible>` implements `Residual<C>`
[INFO] [stdout] note: required by a bound in `core::ops::Try::Residual`
[INFO] [stdout]   --> /rustc/ec6f9a5b4413f74386267ef8efc93712c2ce6db6/library/core/src/ops/try_trait.rs:160:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `u32err` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "fdf05d62f801cd97b5854b1f9e5b44a9382cd92006846854bea5f1618d55aeed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf05d62f801cd97b5854b1f9e5b44a9382cd92006846854bea5f1618d55aeed", kill_on_drop: false }`
[INFO] [stdout] fdf05d62f801cd97b5854b1f9e5b44a9382cd92006846854bea5f1618d55aeed
