[INFO] fetching crate farbfeld 0.3.1...
[INFO] checking farbfeld-0.3.1 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate farbfeld 0.3.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate farbfeld 0.3.1 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate farbfeld 0.3.1
[INFO] finished tweaking crates.io crate farbfeld 0.3.1
[INFO] tweaked toml for crates.io crate farbfeld 0.3.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8658e52008c51e6863b0417902e0b0df4d3285666d152935c11351000efeed1c
[INFO] running `Command { std: "docker" "start" "-a" "8658e52008c51e6863b0417902e0b0df4d3285666d152935c11351000efeed1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8658e52008c51e6863b0417902e0b0df4d3285666d152935c11351000efeed1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8658e52008c51e6863b0417902e0b0df4d3285666d152935c11351000efeed1c", kill_on_drop: false }`
[INFO] [stdout] 8658e52008c51e6863b0417902e0b0df4d3285666d152935c11351000efeed1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c37b31aecaeee67b89b06256f9cbe7fb1c9a27eab863f11cefcfcc23e7aad192
[INFO] running `Command { std: "docker" "start" "-a" "c37b31aecaeee67b89b06256f9cbe7fb1c9a27eab863f11cefcfcc23e7aad192", kill_on_drop: false }`
[INFO] [stderr]     Checking farbfeld v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: unnecessary qualification
[INFO] [stdout]   --> src/lib.rs:26:22
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub type Result<T> = ::std::result::Result<T, Error>;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:7:53
[INFO] [stdout]    |
[INFO] [stdout] 7  | #![deny(unused_extern_crates, unused_import_braces, unused_qualifications)]
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 26 - pub type Result<T> = ::std::result::Result<T, Error>;
[INFO] [stdout] 26 + pub type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary qualification
[INFO] [stdout]   --> src/lib.rs:26:22
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub type Result<T> = ::std::result::Result<T, Error>;
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:7:53
[INFO] [stdout]    |
[INFO] [stdout] 7  | #![deny(unused_extern_crates, unused_import_braces, unused_qualifications)]
[INFO] [stdout]    |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 26 - pub type Result<T> = ::std::result::Result<T, Error>;
[INFO] [stdout] 26 + pub type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:68:33
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn cause (&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn cause (&self) -> Option<&dyn error::Error> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:68:33
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn cause (&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn cause (&self) -> Option<&dyn error::Error> {
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `farbfeld` (lib) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/tests.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |         panic!(e)
[INFO] [stdout]    |                ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]    |
[INFO] [stdout] 22 |         panic!("{}", e)
[INFO] [stdout]    |                +++++
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 22 |         std::panic::panic_any(e)
[INFO] [stdout]    |         ~~~~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `farbfeld` (lib test) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c37b31aecaeee67b89b06256f9cbe7fb1c9a27eab863f11cefcfcc23e7aad192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c37b31aecaeee67b89b06256f9cbe7fb1c9a27eab863f11cefcfcc23e7aad192", kill_on_drop: false }`
[INFO] [stdout] c37b31aecaeee67b89b06256f9cbe7fb1c9a27eab863f11cefcfcc23e7aad192
