[INFO] fetching crate convertible 0.0.1...
[INFO] testing convertible-0.0.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate convertible 0.0.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate convertible 0.0.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate convertible 0.0.1
[INFO] finished tweaking crates.io crate convertible 0.0.1
[INFO] tweaked toml for crates.io crate convertible 0.0.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6edc689e0641c4de38a28d5132510be7fb8df041656e7995d9c877f53a99ca73
[INFO] running `Command { std: "docker" "start" "-a" "6edc689e0641c4de38a28d5132510be7fb8df041656e7995d9c877f53a99ca73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6edc689e0641c4de38a28d5132510be7fb8df041656e7995d9c877f53a99ca73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6edc689e0641c4de38a28d5132510be7fb8df041656e7995d9c877f53a99ca73", kill_on_drop: false }`
[INFO] [stdout] 6edc689e0641c4de38a28d5132510be7fb8df041656e7995d9c877f53a99ca73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 018a0081808d1eecd81f48f0816b27c6e7dc3cc24474ca204b13a024e9d1c6d7
[INFO] running `Command { std: "docker" "start" "-a" "018a0081808d1eecd81f48f0816b27c6e7dc3cc24474ca204b13a024e9d1c6d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling convertible v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: cannot find attribute `license` in this scope
[INFO] [stdout]  --> src/lib.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![license = "MIT"]
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/lib.rs:39:16
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn convert(&From) -> Option<Self>;
[INFO] [stdout]    |                ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &From`
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:3:9
[INFO] [stdout]    |
[INFO] [stdout] 3  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` implied by `#[warn(warnings)]`
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition.
[INFO] [stdout]   --> src/lib.rs:51:15
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn coerce(From) -> Result<Self, From>;
[INFO] [stdout]    |               ^^^^ help: try naming the parameter or explicitly ignoring it: `_: From`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]   --> src/lib.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn to<C: Convertible<Self>>(&self) -> Option<C>;
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout] ...
[INFO] [stdout] 37 | pub trait Convertible<From> {
[INFO] [stdout]    |                       ---- required by this bound in `Convertible`
[INFO] [stdout]    |
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn to<C: Convertible<Self>>(&self) -> Option<C> where Self: Sized;
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider relaxing the implicit `Sized` restriction
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub trait Convertible<From: ?Sized> {
[INFO] [stdout]    |                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]   --> src/lib.rs:20:18
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn coerce<C: Coercible<Self>>(self) -> Result<C, Self>;
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout] ...
[INFO] [stdout] 47 | pub trait Coercible<From> {
[INFO] [stdout]    |                     ---- required by this bound in `Coercible`
[INFO] [stdout]    |
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn coerce<C: Coercible<Self>>(self) -> Result<C, Self> where Self: Sized;
[INFO] [stdout]    |                                                            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider relaxing the implicit `Sized` restriction
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub trait Coercible<From: ?Sized> {
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]    --> src/lib.rs:39:26
[INFO] [stdout]     |
[INFO] [stdout] 39  |     fn convert(&From) -> Option<Self>;
[INFO] [stdout]     |                          ^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout]     |
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]     |
[INFO] [stdout] 39  |     fn convert(&From) -> Option<Self> where Self: Sized;
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the size for values of type `Self` cannot be known at compilation time
[INFO] [stdout]    --> src/lib.rs:51:24
[INFO] [stdout]     |
[INFO] [stdout] 51  |     fn coerce(From) -> Result<Self, From>;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
[INFO] [stdout]     |
[INFO] [stdout] help: consider further restricting `Self`
[INFO] [stdout]     |
[INFO] [stdout] 51  |     fn coerce(From) -> Result<Self, From> where Self: Sized;
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `convertible` due to 6 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "018a0081808d1eecd81f48f0816b27c6e7dc3cc24474ca204b13a024e9d1c6d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "018a0081808d1eecd81f48f0816b27c6e7dc3cc24474ca204b13a024e9d1c6d7", kill_on_drop: false }`
[INFO] [stdout] 018a0081808d1eecd81f48f0816b27c6e7dc3cc24474ca204b13a024e9d1c6d7