[INFO] cloning repository https://github.com/kungfucop/learnrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kungfucop/learnrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkungfucop%2Flearnrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkungfucop%2Flearnrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32196911f8c4a6b2bca270b67a25078567b89b2e
[INFO] checking kungfucop/learnrust against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkungfucop%2Flearnrust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kungfucop/learnrust on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kungfucop/learnrust
[INFO] finished tweaking git repo https://github.com/kungfucop/learnrust
[INFO] tweaked toml for git repo https://github.com/kungfucop/learnrust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/kungfucop/learnrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ferris-says v0.1.1
[INFO] [stderr]   Downloaded backtrace v0.3.26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", 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] 5d9db532e648e86710596cacdb00df6bef8dd150c395553ccff481b420f9c9c4
[INFO] running `Command { std: "docker" "start" "-a" "5d9db532e648e86710596cacdb00df6bef8dd150c395553ccff481b420f9c9c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d9db532e648e86710596cacdb00df6bef8dd150c395553ccff481b420f9c9c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d9db532e648e86710596cacdb00df6bef8dd150c395553ccff481b420f9c9c4", kill_on_drop: false }`
[INFO] [stdout] 5d9db532e648e86710596cacdb00df6bef8dd150c395553ccff481b420f9c9c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4c29df5ea82329d486d4952f9052e794d4d0b74bbc0a27809d419515dd692d8b
[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" "4c29df5ea82329d486d4952f9052e794d4d0b74bbc0a27809d419515dd692d8b", kill_on_drop: false }`
[INFO] [stderr]     Checking backtrace v0.3.26
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking ferris-says v0.1.1
[INFO] [stderr]     Checking Rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0583]: file not found for module `LearnErrorHandling`
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | mod LearnErrorHandling;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `LearnErrorHandling`, create file "src/LearnErrorHandling.rs"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Alignment::Left`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt::Alignment::Left;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/LearnIterator.rs:45:32
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let result = v.iter().find((|idx| { *idx % 2 == 0 }));
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::ToString`
[INFO] [stdout]  --> src/LearnTrait.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/LearnTrait.rs:60:27
[INFO] [stdout]    |
[INFO] [stdout] 60 |     traitReferenceSummary((student))
[INFO] [stdout]    |                           ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/LearnTrait.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn foo() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:48:37
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn call_with_one(some_closure: &Fn(i32) -> i32) -> i32 {
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:62:32
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn callClousure(clousure: &Fn(i32) -> i32) -> i32 {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn factory() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `LearnErrorHandling`
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | mod LearnErrorHandling;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: to create the module `LearnErrorHandling`, create file "src/LearnErrorHandling.rs"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::fmt::Alignment::Left`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::fmt::Alignment::Left;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/LearnIterator.rs:45:32
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let result = v.iter().find((|idx| { *idx % 2 == 0 }));
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::ToString`
[INFO] [stdout]  --> src/LearnTrait.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::string::ToString;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/LearnTrait.rs:60:27
[INFO] [stdout]    |
[INFO] [stdout] 60 |     traitReferenceSummary((student))
[INFO] [stdout]    |                           ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/LearnTrait.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn foo() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:48:37
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn call_with_one(some_closure: &Fn(i32) -> i32) -> i32 {
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:62:32
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn callClousure(clousure: &Fn(i32) -> i32) -> i32 {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/Closure.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn factory() -> Box<Fn(i32) -> i32> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0583`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `Rust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0583`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "4c29df5ea82329d486d4952f9052e794d4d0b74bbc0a27809d419515dd692d8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c29df5ea82329d486d4952f9052e794d4d0b74bbc0a27809d419515dd692d8b", kill_on_drop: false }`
[INFO] [stdout] 4c29df5ea82329d486d4952f9052e794d4d0b74bbc0a27809d419515dd692d8b