[INFO] fetching crate from 0.0.2...
[INFO] testing from-0.0.2 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate from 0.0.2 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate from 0.0.2 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate from 0.0.2
[INFO] finished tweaking crates.io crate from 0.0.2
[INFO] tweaked toml for crates.io crate from 0.0.2 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fecec382cbb807dd27709528e5efaa8821dfad89b29ee79f07d714f9631bd857
[INFO] running `Command { std: "docker" "start" "-a" "fecec382cbb807dd27709528e5efaa8821dfad89b29ee79f07d714f9631bd857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fecec382cbb807dd27709528e5efaa8821dfad89b29ee79f07d714f9631bd857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fecec382cbb807dd27709528e5efaa8821dfad89b29ee79f07d714f9631bd857", kill_on_drop: false }`
[INFO] [stdout] fecec382cbb807dd27709528e5efaa8821dfad89b29ee79f07d714f9631bd857
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a1862b072c0a9b3f353bf905efe82d8266ed3b45c7e79acdc110ea168abec7c
[INFO] running `Command { std: "docker" "start" "-a" "7a1862b072c0a9b3f353bf905efe82d8266ed3b45c7e79acdc110ea168abec7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling from v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn from(I) -> Self;
[INFO] [stdout]   |             ^ help: try naming the parameter or explicitly ignoring it: `_: I`
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(anonymous_parameters)]` implied by `#[deny(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] error[E0599]: no method named `as_slice` found for reference `&'a String` in the current scope
[INFO] [stdout]   --> src/lib.rs:25:43
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn from(x: &'a String) -> &'a str { x.as_slice() }
[INFO] [stdout]    |                                           ^^^^^^^^ method not found in `&'a String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `into_string` found for reference `&'a str` in the current scope
[INFO] [stdout]   --> src/lib.rs:29:39
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn from(x: &'a str) -> String { x.into_string() }
[INFO] [stdout]    |                                       ^^^^^^^^^^^ method not found in `&'a str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `from` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "7a1862b072c0a9b3f353bf905efe82d8266ed3b45c7e79acdc110ea168abec7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a1862b072c0a9b3f353bf905efe82d8266ed3b45c7e79acdc110ea168abec7c", kill_on_drop: false }`
[INFO] [stdout] 7a1862b072c0a9b3f353bf905efe82d8266ed3b45c7e79acdc110ea168abec7c