[INFO] cloning repository https://github.com/rotwatsb/code_kata
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rotwatsb/code_kata" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frotwatsb%2Fcode_kata", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frotwatsb%2Fcode_kata'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 232189e70ed0dbb1665ab38aacc282a839c80a63
[INFO] checking rotwatsb/code_kata against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frotwatsb%2Fcode_kata" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rotwatsb/code_kata 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 git repo https://github.com/rotwatsb/code_kata
[INFO] finished tweaking git repo https://github.com/rotwatsb/code_kata
[INFO] tweaked toml for git repo https://github.com/rotwatsb/code_kata written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/rotwatsb/code_kata already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] bc240a70b4e9560bca6190502b23c2562d81bb1c383b2d4e083c3a0fc4a16eb6
[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" "bc240a70b4e9560bca6190502b23c2562d81bb1c383b2d4e083c3a0fc4a16eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc240a70b4e9560bca6190502b23c2562d81bb1c383b2d4e083c3a0fc4a16eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc240a70b4e9560bca6190502b23c2562d81bb1c383b2d4e083c3a0fc4a16eb6", kill_on_drop: false }`
[INFO] [stdout] bc240a70b4e9560bca6190502b23c2562d81bb1c383b2d4e083c3a0fc4a16eb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 16aec3de3e482b903208279b570a9d55d588aee560e1785735524596755841fb
[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" "16aec3de3e482b903208279b570a9d55d588aee560e1785735524596755841fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking code_kata v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/euler/circular_primes_35.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         'inner: for i in 1..num_digits {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/euler/longest_collatz_14.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 | /             (if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stdout] 30 | |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) });
[INFO] [stdout]    | |______________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 29 |             if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stdout] 30 |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/euler/triangular_12.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `utils`
[INFO] [stdout]  --> src/hackerrank/modfib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use utils;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/hackerrank/cut_the_tree.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/hackerrank/knapsack.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | /         (if sizes[n] > c {
[INFO] [stdout] 29 | |             if n == 0 { return 0; }
[INFO] [stdout] 30 | |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stdout] 31 | |          }
[INFO] [stdout] ...  |
[INFO] [stdout] 35 | |                       max_knapsack(c, n - 1, sizes, values, memoized))
[INFO] [stdout] 36 | |          });
[INFO] [stdout]    | |___________^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 28 |         if sizes[n] > c {
[INFO] [stdout] 29 |             if n == 0 { return 0; }
[INFO] [stdout] 30 |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stdout] 31 |          }
[INFO] [stdout] 32 |          else {
[INFO] [stdout] 33 |              if n == 0 { return values[0]; }
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |     *max_sum = max(*max_sum, (sum_of_sums + vals[i]));
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(inclusive_range_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/euler/circular_primes_35.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         'inner: for i in 1..num_digits {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/euler/longest_collatz_14.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 | /             (if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stdout] 30 | |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) });
[INFO] [stdout]    | |______________________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 29 |             if n % 2 == 0 { 1 + cmp_collatz(n / 2, stored_vals) }
[INFO] [stdout] 30 |              else { 1 + cmp_collatz(3 * n + 1, stored_vals) };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]  --> src/euler/triangular_12.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `utils`
[INFO] [stdout]  --> src/hackerrank/modfib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use utils;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/hackerrank/cut_the_tree.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/hackerrank/knapsack.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 | /         (if sizes[n] > c {
[INFO] [stdout] 29 | |             if n == 0 { return 0; }
[INFO] [stdout] 30 | |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stdout] 31 | |          }
[INFO] [stdout] ...  |
[INFO] [stdout] 35 | |                       max_knapsack(c, n - 1, sizes, values, memoized))
[INFO] [stdout] 36 | |          });
[INFO] [stdout]    | |___________^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 28 |         if sizes[n] > c {
[INFO] [stdout] 29 |             if n == 0 { return 0; }
[INFO] [stdout] 30 |             max_knapsack(c, n - 1, sizes, values, memoized)
[INFO] [stdout] 31 |          }
[INFO] [stdout] 32 |          else {
[INFO] [stdout] 33 |              if n == 0 { return values[0]; }
[INFO] [stdout]  ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/interviewbit/max_sum_path_in_binary_tree.rs:33:30
[INFO] [stdout]    |
[INFO] [stdout] 33 |     *max_sum = max(*max_sum, (sum_of_sums + vals[i]));
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `code_kata`
[INFO] [stdout] error: aborting due to previous error; 7 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] error: aborting due to previous error; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "16aec3de3e482b903208279b570a9d55d588aee560e1785735524596755841fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16aec3de3e482b903208279b570a9d55d588aee560e1785735524596755841fb", kill_on_drop: false }`
[INFO] [stdout] 16aec3de3e482b903208279b570a9d55d588aee560e1785735524596755841fb