[INFO] cloning repository https://github.com/shanlihou/rust_play [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shanlihou/rust_play" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshanlihou%2Frust_play", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshanlihou%2Frust_play'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a1bfb70a5bbead0cbe7c4b7420ecd33e8c07d64e [INFO] checking shanlihou/rust_play against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshanlihou%2Frust_play" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/shanlihou/rust_play [INFO] finished tweaking git repo https://github.com/shanlihou/rust_play [INFO] tweaked toml for git repo https://github.com/shanlihou/rust_play written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/shanlihou/rust_play on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/shanlihou/rust_play 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" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ab020782028976b7459ec99f468870ff50b95a60cb491be73be227d7535c1b1b [INFO] running `Command { std: "docker" "start" "-a" "ab020782028976b7459ec99f468870ff50b95a60cb491be73be227d7535c1b1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ab020782028976b7459ec99f468870ff50b95a60cb491be73be227d7535c1b1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ab020782028976b7459ec99f468870ff50b95a60cb491be73be227d7535c1b1b", kill_on_drop: false }` [INFO] [stdout] ab020782028976b7459ec99f468870ff50b95a60cb491be73be227d7535c1b1b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0220cadfd8de7393b81596cddcef6fe70f952e80a80af430fa744ffb9dba3f37 [INFO] running `Command { std: "docker" "start" "-a" "0220cadfd8de7393b81596cddcef6fe70f952e80a80af430fa744ffb9dba3f37", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.65 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking just_test v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::marker::Copy` [INFO] [stdout] --> src/question_30.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::marker::Copy; [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::marker::Copy` [INFO] [stdout] --> src/question_30.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::marker::Copy; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/question_30.rs:62:28 [INFO] [stdout] | [INFO] [stdout] 62 | if let Some(_cur) = cur_root { [INFO] [stdout] | ^^^^^^^^^^ -------- this expression has type `&Box` [INFO] [stdout] | | [INFO] [stdout] | expected `Box`, found `Option<_>` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `Box` [INFO] [stdout] found enum `Option<_>` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/question_30.rs:62:28 [INFO] [stdout] | [INFO] [stdout] 62 | if let Some(_cur) = cur_root { [INFO] [stdout] | ^^^^^^^^^^ -------- this expression has type `&Box` [INFO] [stdout] | | [INFO] [stdout] | expected `Box`, found `Option<_>` [INFO] [stdout] | [INFO] [stdout] = note: expected struct `Box` [INFO] [stdout] found enum `Option<_>` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `c` is never read [INFO] [stdout] --> src/question_149.rs:33:21 [INFO] [stdout] | [INFO] [stdout] 33 | let mut c = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `c` is never read [INFO] [stdout] --> src/question_149.rs:33:21 [INFO] [stdout] | [INFO] [stdout] 33 | let mut c = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: irrefutable `if let` pattern [INFO] [stdout] --> src/question_149.rs:74:24 [INFO] [stdout] | [INFO] [stdout] 74 | if let x = rate_map.get_mut(&rate).unwrap() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the `if let` is useless [INFO] [stdout] = help: consider replacing the `if let` with a `let` [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: irrefutable `if let` pattern [INFO] [stdout] --> src/question_149.rs:74:24 [INFO] [stdout] | [INFO] [stdout] 74 | if let x = rate_map.get_mut(&rate).unwrap() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this pattern will always match, so the `if let` is useless [INFO] [stdout] = help: consider replacing the `if let` with a `let` [INFO] [stdout] = note: `#[warn(irrefutable_let_patterns)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `start` [INFO] [stdout] --> src/question_149.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | let start = 1; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `start` [INFO] [stdout] --> src/question_149.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | let start = 1; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `c` is never read [INFO] [stdout] --> src/question_878.rs:16:21 [INFO] [stdout] | [INFO] [stdout] 16 | let mut c = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `c` is never read [INFO] [stdout] --> src/question_878.rs:16:21 [INFO] [stdout] | [INFO] [stdout] 16 | let mut c = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/question_30.rs:24:13 [INFO] [stdout] | [INFO] [stdout] 24 | for i in 0..26 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/question_30.rs:24:13 [INFO] [stdout] | [INFO] [stdout] 24 | for i in 0..26 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/question_30.rs:81:27 [INFO] [stdout] | [INFO] [stdout] 81 | pub fn find_substring(s: String, words: Vec) -> Vec { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/question_30.rs:81:27 [INFO] [stdout] | [INFO] [stdout] 81 | pub fn find_substring(s: String, words: Vec) -> Vec { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/question_30.rs:82:13 [INFO] [stdout] | [INFO] [stdout] 82 | let t = Trie::new(&words); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/question_30.rs:82:13 [INFO] [stdout] | [INFO] [stdout] 82 | let t = Trie::new(&words); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut ret = str_s[2..(str_s.len() - 2)].split("],["); [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: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut ret = str_s[2..(str_s.len() - 2)].split("],["); [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] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `just_test` (bin "just_test" test) due to 1 previous error; 9 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `just_test` (bin "just_test") due to 1 previous error; 9 warnings emitted [INFO] running `Command { std: "docker" "inspect" "0220cadfd8de7393b81596cddcef6fe70f952e80a80af430fa744ffb9dba3f37", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0220cadfd8de7393b81596cddcef6fe70f952e80a80af430fa744ffb9dba3f37", kill_on_drop: false }` [INFO] [stdout] 0220cadfd8de7393b81596cddcef6fe70f952e80a80af430fa744ffb9dba3f37