[INFO] fetching crate dbg 1.0.4...
[INFO] checking dbg-1.0.4 against beta for pr-78714
[INFO] extracting crate dbg 1.0.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate dbg 1.0.4 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dbg 1.0.4
[INFO] finished tweaking crates.io crate dbg 1.0.4
[INFO] tweaked toml for crates.io crate dbg 1.0.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 664975f4aa1f13caeaf21feec7670121f03d852359435fa40fbf0f0460d0d2d5
[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" "664975f4aa1f13caeaf21feec7670121f03d852359435fa40fbf0f0460d0d2d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "664975f4aa1f13caeaf21feec7670121f03d852359435fa40fbf0f0460d0d2d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "664975f4aa1f13caeaf21feec7670121f03d852359435fa40fbf0f0460d0d2d5", kill_on_drop: false }`
[INFO] [stdout] 664975f4aa1f13caeaf21feec7670121f03d852359435fa40fbf0f0460d0d2d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta" "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] 140dcf8f91d0997b4018a24561ed572503a991bbece0c5065f8d9193e43ba573
[INFO] running `Command { std: "docker" "start" "-a" "140dcf8f91d0997b4018a24561ed572503a991bbece0c5065f8d9193e43ba573", kill_on_drop: false }`
[INFO] [stderr]    Compiling dbg v1.0.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `X` doesn't implement `Debug`
[INFO] [stdout]    --> src/lib.rs:86:62
[INFO] [stdout]     |
[INFO] [stdout] 86  |                     (if detailed { write!(&mut err, "{:#?}", _tmp) }
[INFO] [stdout]     |                                                              ^^^^ `X` cannot be formatted using `{:?}`
[INFO] [stdout] ...
[INFO] [stdout] 270 |         dbg!(&a);
[INFO] [stdout]     |         --------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `X`
[INFO] [stdout]     = note: add `#[derive(Debug)]` or manually implement `Debug`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&X`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `WrapDebug<&X>`
[INFO] [stdout]     = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `X` doesn't implement `Debug`
[INFO] [stdout]    --> src/lib.rs:87:62
[INFO] [stdout]     |
[INFO] [stdout] 87  |                     else         { write!(&mut err, "{:?}" , _tmp) }).unwrap();
[INFO] [stdout]     |                                                              ^^^^ `X` cannot be formatted using `{:?}`
[INFO] [stdout] ...
[INFO] [stdout] 270 |         dbg!(&a);
[INFO] [stdout]     |         --------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Debug` is not implemented for `X`
[INFO] [stdout]     = note: add `#[derive(Debug)]` or manually implement `Debug`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `&X`
[INFO] [stdout]     = note: required because of the requirements on the impl of `Debug` for `WrapDebug<&X>`
[INFO] [stdout]     = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dbg`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "140dcf8f91d0997b4018a24561ed572503a991bbece0c5065f8d9193e43ba573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "140dcf8f91d0997b4018a24561ed572503a991bbece0c5065f8d9193e43ba573", kill_on_drop: false }`
[INFO] [stdout] 140dcf8f91d0997b4018a24561ed572503a991bbece0c5065f8d9193e43ba573