[INFO] fetching crate serde_dynamic_typing 0.1.1...
[INFO] testing serde_dynamic_typing-0.1.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate serde_dynamic_typing 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate serde_dynamic_typing 0.1.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_dynamic_typing 0.1.1
[INFO] finished tweaking crates.io crate serde_dynamic_typing 0.1.1
[INFO] tweaked toml for crates.io crate serde_dynamic_typing 0.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ebacktrace v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe9cbb59b0757f21341cab8c9138108f87d6f7b3443c0f6c4e5def2e037d724c
[INFO] running `Command { std: "docker" "start" "-a" "fe9cbb59b0757f21341cab8c9138108f87d6f7b3443c0f6c4e5def2e037d724c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe9cbb59b0757f21341cab8c9138108f87d6f7b3443c0f6c4e5def2e037d724c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe9cbb59b0757f21341cab8c9138108f87d6f7b3443c0f6c4e5def2e037d724c", kill_on_drop: false }`
[INFO] [stdout] fe9cbb59b0757f21341cab8c9138108f87d6f7b3443c0f6c4e5def2e037d724c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63d6164f232dae11a3a0ed478b048d8520e2ec40e9336ab6b7fdbd59fd612992
[INFO] running `Command { std: "docker" "start" "-a" "63d6164f232dae11a3a0ed478b048d8520e2ec40e9336ab6b7fdbd59fd612992", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling ebacktrace v0.2.0
[INFO] [stderr]    Compiling serde_dynamic_typing v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0407]: method `backtrace` is not a member of trait `std::error::Error`
[INFO] [stdout]   --> src/error.rs:61:1
[INFO] [stdout]    |
[INFO] [stdout] 61 | define_error!(ErrorImpl);
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `std::error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `define_error` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | #![feature(backtrace)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `backtrace` has been stable since 1.65.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | #![feature(backtrace)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0407, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0407`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serde_dynamic_typing` (lib) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "63d6164f232dae11a3a0ed478b048d8520e2ec40e9336ab6b7fdbd59fd612992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d6164f232dae11a3a0ed478b048d8520e2ec40e9336ab6b7fdbd59fd612992", kill_on_drop: false }`
[INFO] [stdout] 63d6164f232dae11a3a0ed478b048d8520e2ec40e9336ab6b7fdbd59fd612992
