[INFO] fetching crate seven 0.1.0...
[INFO] checking seven-0.1.0 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate seven 0.1.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate seven 0.1.0 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate seven 0.1.0
[INFO] finished tweaking crates.io crate seven 0.1.0
[INFO] tweaked toml for crates.io crate seven 0.1.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e070d39ee999ab4ae24249454d199f92b2e4249735ba05dc9c8d56ec0070f607
[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" "e070d39ee999ab4ae24249454d199f92b2e4249735ba05dc9c8d56ec0070f607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e070d39ee999ab4ae24249454d199f92b2e4249735ba05dc9c8d56ec0070f607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e070d39ee999ab4ae24249454d199f92b2e4249735ba05dc9c8d56ec0070f607", kill_on_drop: false }`
[INFO] [stdout] e070d39ee999ab4ae24249454d199f92b2e4249735ba05dc9c8d56ec0070f607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b11277f13c5841dc1e3142c8c23c4bebe73b530c55954a9b5fbcd08a733e628a
[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" "b11277f13c5841dc1e3142c8c23c4bebe73b530c55954a9b5fbcd08a733e628a", kill_on_drop: false }`
[INFO] [stderr]     Checking seven v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 | type MiddlewareFunction = Box<FnMut(&mut Vec<SimpleFile>)>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&mut Vec<SimpleFile>)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lib.rs:16:31
[INFO] [stdout]    |
[INFO] [stdout] 16 | type MiddlewareFunction = Box<FnMut(&mut Vec<SimpleFile>)>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&mut Vec<SimpleFile>)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]   --> src/lib.rs:18:51
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn seven(middleware: Vec<MiddlewareFunction>, destination: &str) -> Vec<SimpleFile> {
[INFO] [stdout]    |                                                   ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 2 arguments but 1 argument was supplied
[INFO] [stdout]   --> src/lib.rs:64:22
[INFO] [stdout]    |
[INFO] [stdout] 64 |           let result = seven(vec![
[INFO] [stdout]    |  ______________________^^^^^_-
[INFO] [stdout]    | |                      |
[INFO] [stdout]    | |                      expected 2 arguments
[INFO] [stdout] 65 | |             Box::new(|files: &mut Vec<SimpleFile>| {
[INFO] [stdout] 66 | |                 let file: &mut SimpleFile = &mut files[0];
[INFO] [stdout] 67 | |                 file.content = "test hello".to_string();
[INFO] [stdout] ...  |
[INFO] [stdout] 72 | |             }),
[INFO] [stdout] 73 | |         ]);
[INFO] [stdout]    | |_________- supplied 1 argument
[INFO] [stdout]    |
[INFO] [stdout] note: function defined here
[INFO] [stdout]   --> src/lib.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub fn seven(middleware: Vec<MiddlewareFunction>, destination: &str) -> Vec<SimpleFile> {
[INFO] [stdout]    |        ^^^^^ -----------------------------------  -----------------
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/lib.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |             &files.push(file_struct);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 41 |             let _ = &files.push(file_struct);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:69:22
[INFO] [stdout]    |
[INFO] [stdout] 65 |               Box::new(|files: &mut Vec<SimpleFile>| {
[INFO] [stdout]    |  ______________________-
[INFO] [stdout] 66 | |                 let file: &mut SimpleFile = &mut files[0];
[INFO] [stdout] 67 | |                 file.content = "test hello".to_string();
[INFO] [stdout] 68 | |             }),
[INFO] [stdout]    | |_____________- the expected closure
[INFO] [stdout] 69 |               Box::new(|files: &mut Vec<SimpleFile>| {
[INFO] [stdout]    |  ______________________^
[INFO] [stdout] 70 | |                 let file: &mut SimpleFile = &mut files[0];
[INFO] [stdout] 71 | |                 file.content = "override".to_string();
[INFO] [stdout] 72 | |             }),
[INFO] [stdout]    | |_____________^ expected closure, found a different closure
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected closure `[closure@src/lib.rs:65:22: 68:14]`
[INFO] [stdout]               found closure `[closure@src/lib.rs:69:22: 72:14]`
[INFO] [stdout]    = note: no two closures, even if identical, have the same type
[INFO] [stdout]    = help: consider boxing your closure and/or using it as a trait object
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `seven` due to 3 previous errors; 1 warning emitted
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b11277f13c5841dc1e3142c8c23c4bebe73b530c55954a9b5fbcd08a733e628a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b11277f13c5841dc1e3142c8c23c4bebe73b530c55954a9b5fbcd08a733e628a", kill_on_drop: false }`
[INFO] [stdout] b11277f13c5841dc1e3142c8c23c4bebe73b530c55954a9b5fbcd08a733e628a
