[INFO] fetching crate brain-brainfuck 1.3.0...
[INFO] checking brain-brainfuck-1.3.0 against beta for pr-78714
[INFO] extracting crate brain-brainfuck 1.3.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate brain-brainfuck 1.3.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate brain-brainfuck 1.3.0
[INFO] finished tweaking crates.io crate brain-brainfuck 1.3.0
[INFO] tweaked toml for crates.io crate brain-brainfuck 1.3.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec8a16ee40179fb1c9cddf4990a0a38d9b6863fb420399ebaf0ba83348b5e99e
[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" "ec8a16ee40179fb1c9cddf4990a0a38d9b6863fb420399ebaf0ba83348b5e99e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec8a16ee40179fb1c9cddf4990a0a38d9b6863fb420399ebaf0ba83348b5e99e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec8a16ee40179fb1c9cddf4990a0a38d9b6863fb420399ebaf0ba83348b5e99e", kill_on_drop: false }`
[INFO] [stdout] ec8a16ee40179fb1c9cddf4990a0a38d9b6863fb420399ebaf0ba83348b5e99e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ada9fe0f450d5c44abc43887f199c42eeb9f4fa612a356930c2b02fe0c5aac7e
[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" "ada9fe0f450d5c44abc43887f199c42eeb9f4fa612a356930c2b02fe0c5aac7e", kill_on_drop: false }`
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking brain-brainfuck v1.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/interpreter.rs:100:18
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn fill_matching(mut program: &mut Vec<Instruction>, start: usize) -> usize {
[INFO] [stdout]     |                  ----^^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> benches/benchmark.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> benches/benchmark.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / lazy_static! {
[INFO] [stdout] 14 | |     // This program is trivial to run in both size and speed
[INFO] [stdout] 15 | |     static ref TRIVIAL_SOURCE: Vec<u8> = include_bytes!("../examples/hello-world.bf").to_vec();
[INFO] [stdout] 16 | |     // This is a very large program in size
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |     static ref SLOW_SOURCE: Vec<u8> = include_bytes!("../examples/mandel.bf").to_vec();
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> benches/benchmark.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / lazy_static! {
[INFO] [stdout] 14 | |     // This program is trivial to run in both size and speed
[INFO] [stdout] 15 | |     static ref TRIVIAL_SOURCE: Vec<u8> = include_bytes!("../examples/hello-world.bf").to_vec();
[INFO] [stdout] 16 | |     // This is a very large program in size
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |     static ref SLOW_SOURCE: Vec<u8> = include_bytes!("../examples/mandel.bf").to_vec();
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> benches/benchmark.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / lazy_static! {
[INFO] [stdout] 14 | |     // This program is trivial to run in both size and speed
[INFO] [stdout] 15 | |     static ref TRIVIAL_SOURCE: Vec<u8> = include_bytes!("../examples/hello-world.bf").to_vec();
[INFO] [stdout] 16 | |     // This is a very large program in size
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |     static ref SLOW_SOURCE: Vec<u8> = include_bytes!("../examples/mandel.bf").to_vec();
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> benches/benchmark.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / lazy_static! {
[INFO] [stdout] 14 | |     // This program is trivial to run in both size and speed
[INFO] [stdout] 15 | |     static ref TRIVIAL_SOURCE: Vec<u8> = include_bytes!("../examples/hello-world.bf").to_vec();
[INFO] [stdout] 16 | |     // This is a very large program in size
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |     static ref SLOW_SOURCE: Vec<u8> = include_bytes!("../examples/mandel.bf").to_vec();
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> benches/benchmark.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / lazy_static! {
[INFO] [stdout] 14 | |     // This program is trivial to run in both size and speed
[INFO] [stdout] 15 | |     static ref TRIVIAL_SOURCE: Vec<u8> = include_bytes!("../examples/hello-world.bf").to_vec();
[INFO] [stdout] 16 | |     // This is a very large program in size
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |     static ref SLOW_SOURCE: Vec<u8> = include_bytes!("../examples/mandel.bf").to_vec();
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/interpreter.rs:100:18
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn fill_matching(mut program: &mut Vec<Instruction>, start: usize) -> usize {
[INFO] [stdout]     |                  ----^^^^^^^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `brain-brainfuck`
[INFO] [stdout] error: aborting due to previous error; 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ada9fe0f450d5c44abc43887f199c42eeb9f4fa612a356930c2b02fe0c5aac7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ada9fe0f450d5c44abc43887f199c42eeb9f4fa612a356930c2b02fe0c5aac7e", kill_on_drop: false }`
[INFO] [stdout] ada9fe0f450d5c44abc43887f199c42eeb9f4fa612a356930c2b02fe0c5aac7e