[INFO] cloning repository https://github.com/nikita0607/BrainFuck [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikita0607/BrainFuck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikita0607%2FBrainFuck", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikita0607%2FBrainFuck'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ef6f47342aae229b5262f511c3cb133c2ff86af2 [INFO] checking nikita0607/BrainFuck against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikita0607%2FBrainFuck" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/nikita0607/BrainFuck [INFO] finished tweaking git repo https://github.com/nikita0607/BrainFuck [INFO] tweaked toml for git repo https://github.com/nikita0607/BrainFuck written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/nikita0607/BrainFuck on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/nikita0607/BrainFuck 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8682c1c5c9c2de264174f0b3a73e0bab62dddc6643c2202918d0e1968b7af459 [INFO] running `Command { std: "docker" "start" "-a" "8682c1c5c9c2de264174f0b3a73e0bab62dddc6643c2202918d0e1968b7af459", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8682c1c5c9c2de264174f0b3a73e0bab62dddc6643c2202918d0e1968b7af459", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8682c1c5c9c2de264174f0b3a73e0bab62dddc6643c2202918d0e1968b7af459", kill_on_drop: false }` [INFO] [stdout] 8682c1c5c9c2de264174f0b3a73e0bab62dddc6643c2202918d0e1968b7af459 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 11c71967d1523dd1c41a0dd4af8083a1afdbd800b264d696b2ac6b16cdffe3ca [INFO] running `Command { std: "docker" "start" "-a" "11c71967d1523dd1c41a0dd4af8083a1afdbd800b264d696b2ac6b16cdffe3ca", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.106 [INFO] [stderr] Checking smallvec v1.7.0 [INFO] [stderr] Checking unicode-segmentation v1.8.0 [INFO] [stderr] Checking utf8parse v0.2.0 [INFO] [stderr] Checking unicode-width v0.1.9 [INFO] [stderr] Checking strfmt v0.1.6 [INFO] [stderr] Compiling memoffset v0.6.4 [INFO] [stderr] Checking nibble_vec v0.1.0 [INFO] [stderr] Checking radix_trie v0.2.1 [INFO] [stderr] Checking dirs-sys-next v0.1.2 [INFO] [stderr] Checking fd-lock v3.0.0 [INFO] [stderr] Checking nix v0.22.2 [INFO] [stderr] Checking dirs-next v2.0.0 [INFO] [stderr] Checking rustyline v9.0.0 [INFO] [stderr] Checking BrainFuck v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:517:9 [INFO] [stdout] | [INFO] [stdout] 517 | for i in 0..3 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [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 `string_id` is never read [INFO] [stdout] --> src/main.rs:496:32 [INFO] [stdout] | [INFO] [stdout] 496 | let mut string_id: usize = 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 `sym_id` is never read [INFO] [stdout] --> src/main.rs:497:29 [INFO] [stdout] | [INFO] [stdout] 497 | let mut sym_id: usize = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:532:9 [INFO] [stdout] | [INFO] [stdout] 532 | let mut last_lines: Vec = vec![]; [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: `last_lines` [INFO] [stdout] --> src/main.rs:532:9 [INFO] [stdout] | [INFO] [stdout] 532 | let mut last_lines: Vec = vec![]; [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_lines` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:122:10 [INFO] [stdout] | [INFO] [stdout] 122 | Main(usize) [INFO] [stdout] | ---- ^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 122 - Main(usize) [INFO] [stdout] 122 + Main(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:193:10 [INFO] [stdout] | [INFO] [stdout] 193 | Prev(i32), [INFO] [stdout] | ---- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 193 - Prev(i32), [INFO] [stdout] 193 + Prev(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Str` is never constructed [INFO] [stdout] --> src/main.rs:196:5 [INFO] [stdout] | [INFO] [stdout] 189 | enum Token { [INFO] [stdout] | ----- variant in this enum [INFO] [stdout] ... [INFO] [stdout] 196 | Str(Box), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: module `Lang` should have a snake case name [INFO] [stdout] --> src/main.rs:126:9 [INFO] [stdout] | [INFO] [stdout] 126 | pub mod Lang { [INFO] [stdout] | ^^^^ help: convert the identifier to snake case: `lang` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:517:9 [INFO] [stdout] | [INFO] [stdout] 517 | for i in 0..3 { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [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 `string_id` is never read [INFO] [stdout] --> src/main.rs:496:32 [INFO] [stdout] | [INFO] [stdout] 496 | let mut string_id: usize = 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 `sym_id` is never read [INFO] [stdout] --> src/main.rs:497:29 [INFO] [stdout] | [INFO] [stdout] 497 | let mut sym_id: usize = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:532:9 [INFO] [stdout] | [INFO] [stdout] 532 | let mut last_lines: Vec = vec![]; [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: `last_lines` [INFO] [stdout] --> src/main.rs:532:9 [INFO] [stdout] | [INFO] [stdout] 532 | let mut last_lines: Vec = vec![]; [INFO] [stdout] | ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_lines` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:404:30 [INFO] [stdout] | [INFO] [stdout] 404 | id = loops[loops.len()-1].try_into().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:122:10 [INFO] [stdout] | [INFO] [stdout] 122 | Main(usize) [INFO] [stdout] | ---- ^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 122 - Main(usize) [INFO] [stdout] 122 + Main(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:193:10 [INFO] [stdout] | [INFO] [stdout] 193 | Prev(i32), [INFO] [stdout] | ---- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 193 - Prev(i32), [INFO] [stdout] 193 + Prev(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Str` is never constructed [INFO] [stdout] --> src/main.rs:196:5 [INFO] [stdout] | [INFO] [stdout] 189 | enum Token { [INFO] [stdout] | ----- variant in this enum [INFO] [stdout] ... [INFO] [stdout] 196 | Str(Box), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: module `Lang` should have a snake case name [INFO] [stdout] --> src/main.rs:126:9 [INFO] [stdout] | [INFO] [stdout] 126 | pub mod Lang { [INFO] [stdout] | ^^^^ help: convert the identifier to snake case: `lang` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:404:30 [INFO] [stdout] | [INFO] [stdout] 404 | id = loops[loops.len()-1].try_into().unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `BrainFuck` (bin "BrainFuck") 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 `BrainFuck` (bin "BrainFuck" test) due to 1 previous error; 9 warnings emitted [INFO] running `Command { std: "docker" "inspect" "11c71967d1523dd1c41a0dd4af8083a1afdbd800b264d696b2ac6b16cdffe3ca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "11c71967d1523dd1c41a0dd4af8083a1afdbd800b264d696b2ac6b16cdffe3ca", kill_on_drop: false }` [INFO] [stdout] 11c71967d1523dd1c41a0dd4af8083a1afdbd800b264d696b2ac6b16cdffe3ca