[INFO] cloning repository https://github.com/yavrib/rust-closures-playground [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yavrib/rust-closures-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyavrib%2Frust-closures-playground", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyavrib%2Frust-closures-playground'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ac31b4f22d24ab919d6edb5ab9396af3f9bbecc3 [INFO] checking yavrib/rust-closures-playground against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyavrib%2Frust-closures-playground" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/yavrib/rust-closures-playground on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/yavrib/rust-closures-playground [INFO] finished tweaking git repo https://github.com/yavrib/rust-closures-playground [INFO] tweaked toml for git repo https://github.com/yavrib/rust-closures-playground written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/yavrib/rust-closures-playground already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4aba012bf4d4a8abee1e27cd51ccefcb6b24f4a441542aff0eac3ae262c20698 [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" "4aba012bf4d4a8abee1e27cd51ccefcb6b24f4a441542aff0eac3ae262c20698", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4aba012bf4d4a8abee1e27cd51ccefcb6b24f4a441542aff0eac3ae262c20698", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4aba012bf4d4a8abee1e27cd51ccefcb6b24f4a441542aff0eac3ae262c20698", kill_on_drop: false }` [INFO] [stdout] 4aba012bf4d4a8abee1e27cd51ccefcb6b24f4a441542aff0eac3ae262c20698 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 71537b07b92aacd7ca13cb221c20e816792f6cf5664b0c0a45c84e1f6d4989c5 [INFO] running `Command { std: "docker" "start" "-a" "71537b07b92aacd7ca13cb221c20e816792f6cf5664b0c0a45c84e1f6d4989c5", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Checking rust-closures-playground v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:3:58 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rust-closures-playground` [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:3:59 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(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] [stderr] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:10:70 [INFO] [stdout] | [INFO] [stdout] 10 | fn static_lifetime_specified_higher_order_function() -> &'static (Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:10:71 [INFO] [stdout] | [INFO] [stdout] 10 | fn static_lifetime_specified_higher_order_function() -> &'static (Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:17:45 [INFO] [stdout] | [INFO] [stdout] 17 | fn boxed_higher_order_function() -> Box 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/main.rs:23:39 [INFO] [stdout] | [INFO] [stdout] 23 | fn higher_order_function() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> src/main.rs:3:57 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(Fn(i32) -> i32) { [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from [INFO] [stdout] help: consider using the `'static` lifetime [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &'static (Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0106`. [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:3:58 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:3:59 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(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: unnecessary parentheses around type [INFO] [stdout] --> src/main.rs:10:70 [INFO] [stdout] | [INFO] [stdout] 10 | fn static_lifetime_specified_higher_order_function() -> &'static (Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:10:71 [INFO] [stdout] | [INFO] [stdout] 10 | fn static_lifetime_specified_higher_order_function() -> &'static (Fn(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/main.rs:17:45 [INFO] [stdout] | [INFO] [stdout] 17 | fn boxed_higher_order_function() -> Box 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/main.rs:23:39 [INFO] [stdout] | [INFO] [stdout] 23 | fn higher_order_function() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> src/main.rs:3:57 [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &(Fn(i32) -> i32) { [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from [INFO] [stdout] help: consider using the `'static` lifetime [INFO] [stdout] | [INFO] [stdout] 3 | fn no_lifetime_specified_higher_order_function() -> &'static (Fn(i32) -> i32) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0106`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "71537b07b92aacd7ca13cb221c20e816792f6cf5664b0c0a45c84e1f6d4989c5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "71537b07b92aacd7ca13cb221c20e816792f6cf5664b0c0a45c84e1f6d4989c5", kill_on_drop: false }` [INFO] [stdout] 71537b07b92aacd7ca13cb221c20e816792f6cf5664b0c0a45c84e1f6d4989c5