[INFO] cloning repository https://github.com/Kerisnarendra/rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Kerisnarendra/rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerisnarendra%2Frust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerisnarendra%2Frust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68c2bfff56911332510018caf4bfb0d5e7b82565
[INFO] checking Kerisnarendra/rust against try#595142ec72045c7f2fab2923de8e59995a52e6e7 for pr-151830
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKerisnarendra%2Frust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Kerisnarendra/rust
[INFO] finished tweaking git repo https://github.com/Kerisnarendra/rust
[INFO] tweaked toml for git repo https://github.com/Kerisnarendra/rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Kerisnarendra/rust on toolchain 595142ec72045c7f2fab2923de8e59995a52e6e7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595142ec72045c7f2fab2923de8e59995a52e6e7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Kerisnarendra/rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+595142ec72045c7f2fab2923de8e59995a52e6e7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+595142ec72045c7f2fab2923de8e59995a52e6e7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 030fa86d7f416e07a279d00532518b89ba92c6b1bda3fb101178b7c26688e50a
[INFO] running `Command { std: "docker" "start" "-a" "030fa86d7f416e07a279d00532518b89ba92c6b1bda3fb101178b7c26688e50a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "030fa86d7f416e07a279d00532518b89ba92c6b1bda3fb101178b7c26688e50a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030fa86d7f416e07a279d00532518b89ba92c6b1bda3fb101178b7c26688e50a", kill_on_drop: false }`
[INFO] [stdout] 030fa86d7f416e07a279d00532518b89ba92c6b1bda3fb101178b7c26688e50a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+595142ec72045c7f2fab2923de8e59995a52e6e7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c026d7d43f69248571770db03c3fbfeb5262cb5c8261aea9e1130c9fb529aead
[INFO] running `Command { std: "docker" "start" "-a" "c026d7d43f69248571770db03c3fbfeb5262cb5c8261aea9e1130c9fb529aead", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc_macro v0.1.0 (/opt/rustwide/workdir/src/macros_and_metaprogramming/proc_macro)
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]  --> src/macros_and_metaprogramming/derive_macro.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Struct;
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] attr: ""
[INFO] [stdout] item: "fn basic_function() {}"
[INFO] [stdout] attr: "input"
[INFO] [stdout] item: "fn function_with_input() {}"
[INFO] [stdout] attr: ""
[INFO] [stdout] item: "fn basic_function() {}"
[INFO] [stdout] attr: "input"
[INFO] [stdout] item: "fn function_with_input() {}"
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]  --> src/macros_and_metaprogramming/derive_macro.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Struct;
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stdout]  --> src/debugging/pretty_printing.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 |     println!("The value of x is: {}", x);
[INFO] [stdout]   |                                  --   ^ `()` cannot be formatted with the default formatter
[INFO] [stdout]   |                                  |
[INFO] [stdout]   |                                  required by this formatting parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust` (bin "pretty_printing" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stdout]  --> src/debugging/pretty_printing.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 |     println!("The value of x is: {}", x);
[INFO] [stdout]   |                                  --   ^ `()` cannot be formatted with the default formatter
[INFO] [stdout]   |                                  |
[INFO] [stdout]   |                                  required by this formatting parameter
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust` (bin "pretty_printing") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "c026d7d43f69248571770db03c3fbfeb5262cb5c8261aea9e1130c9fb529aead", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c026d7d43f69248571770db03c3fbfeb5262cb5c8261aea9e1130c9fb529aead", kill_on_drop: false }`
[INFO] [stdout] c026d7d43f69248571770db03c3fbfeb5262cb5c8261aea9e1130c9fb529aead