[INFO] cloning repository https://github.com/dajinchu/boggle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dajinchu/boggle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d74f689c074b6440704c1958596777ba9ad7ac6c
[INFO] checking dajinchu/boggle against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dajinchu/boggle
[INFO] finished tweaking git repo https://github.com/dajinchu/boggle
[INFO] tweaked toml for git repo https://github.com/dajinchu/boggle written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dajinchu/boggle on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dajinchu/boggle already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nibble_vec v0.1.0
[INFO] [stderr]   Downloaded endian-type v0.1.2
[INFO] [stderr]   Downloaded yada v0.5.0
[INFO] [stderr]   Downloaded radix_trie v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db8f8213ca1b4ebd7517a08fbe2fad0fa9ce4909355e4e493075c56a1f60bc64
[INFO] running `Command { std: "docker" "start" "-a" "db8f8213ca1b4ebd7517a08fbe2fad0fa9ce4909355e4e493075c56a1f60bc64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db8f8213ca1b4ebd7517a08fbe2fad0fa9ce4909355e4e493075c56a1f60bc64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db8f8213ca1b4ebd7517a08fbe2fad0fa9ce4909355e4e493075c56a1f60bc64", kill_on_drop: false }`
[INFO] [stdout] db8f8213ca1b4ebd7517a08fbe2fad0fa9ce4909355e4e493075c56a1f60bc64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e46028f47c4b96951c561534bfa3e44c4a440586e1d1758918c6edb5f37a7fad
[INFO] running `Command { std: "docker" "start" "-a" "e46028f47c4b96951c561534bfa3e44c4a440586e1d1758918c6edb5f37a7fad", kill_on_drop: false }`
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking yada v0.5.0
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]     Checking boggle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linkedlist::TrieLinkedList`
[INFO] [stdout]    --> src/solver.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |     use crate::word_dict::{linkedlist::TrieLinkedList, linkedlist_typedarena::TrieLinkedListArena};
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/radix_lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/word_dict/yada.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/yada.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::Trie`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::word_dict::Trie;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::hashmap::TrieHashMap`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::word_dict::hashmap::TrieHashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::linkedlist::TrieLinkedList`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::word_dict::linkedlist::TrieLinkedList;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/radix_lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/word_dict/yada.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/yada.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::Trie`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::word_dict::Trie;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::hashmap::TrieHashMap`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::word_dict::hashmap::TrieHashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::linkedlist::TrieLinkedList`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::word_dict::linkedlist::TrieLinkedList;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let debug = word.starts_with("spoon");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some((i, c)) = chars.next() {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn blank(c: char) -> TrieRadix {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boggle` (bin "boggle") due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let debug = word.starts_with("spoon");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some((i, c)) = chars.next() {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/word_dict/linkedlist.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let mut count = 0;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/word_dict/linkedlist.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let mut count = 0;
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/word_dict/linkedlist_typedarena.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let mut dict = TrieLinkedListArena::blank(' ');
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn blank(c: char) -> TrieRadix {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut count = 0;
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut count = 0;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/yada.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let mut dict = TrieYada::from_words(
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dict`
[INFO] [stdout]   --> src/word_dict/yada.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let mut dict = TrieYada::from_words(
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dict`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/yada.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut count = 0;
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/word_dict/yada.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut count = 0;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boggle` (bin "boggle" test) due to 1 previous error; 19 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e46028f47c4b96951c561534bfa3e44c4a440586e1d1758918c6edb5f37a7fad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e46028f47c4b96951c561534bfa3e44c4a440586e1d1758918c6edb5f37a7fad", kill_on_drop: false }`
[INFO] [stdout] e46028f47c4b96951c561534bfa3e44c4a440586e1d1758918c6edb5f37a7fad
