[INFO] cloning repository https://github.com/Oveln/ov_lexical_analysis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Oveln/ov_lexical_analysis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOveln%2Fov_lexical_analysis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOveln%2Fov_lexical_analysis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3cd6e9f15b5edc229529ac1f5e114f6a07944ac
[INFO] checking Oveln/ov_lexical_analysis 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%2FOveln%2Fov_lexical_analysis" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Oveln/ov_lexical_analysis
[INFO] finished tweaking git repo https://github.com/Oveln/ov_lexical_analysis
[INFO] tweaked toml for git repo https://github.com/Oveln/ov_lexical_analysis written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Oveln/ov_lexical_analysis 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/Oveln/ov_lexical_analysis 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 11d5866e899ba7ad64c6d5b8c4bffaa1f2024c8af64d4c8f4cf349ea08a3d1ae
[INFO] running `Command { std: "docker" "start" "-a" "11d5866e899ba7ad64c6d5b8c4bffaa1f2024c8af64d4c8f4cf349ea08a3d1ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11d5866e899ba7ad64c6d5b8c4bffaa1f2024c8af64d4c8f4cf349ea08a3d1ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11d5866e899ba7ad64c6d5b8c4bffaa1f2024c8af64d4c8f4cf349ea08a3d1ae", kill_on_drop: false }`
[INFO] [stdout] 11d5866e899ba7ad64c6d5b8c4bffaa1f2024c8af64d4c8f4cf349ea08a3d1ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 2b301543295dc50af09f5008803063b1ee8cee93a386af97ba7fbb382a4dbe86
[INFO] running `Command { std: "docker" "start" "-a" "2b301543295dc50af09f5008803063b1ee8cee93a386af97ba7fbb382a4dbe86", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.84
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]     Checking winnow v0.6.9
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]     Checking toml_datetime v0.6.6
[INFO] [stderr]     Checking serde_spanned v0.6.6
[INFO] [stderr]     Checking toml_edit v0.22.13
[INFO] [stderr]     Checking toml v0.8.13
[INFO] [stderr]     Checking ov_lexical_analysis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Tokens`
[INFO] [stdout]  --> src/main.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 | use token::{Token, Tokens};
[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 imports: `BTreeSet`, `HashMap`, `HashSet`, and `os::linux::raw::stat`
[INFO] [stdout]  --> src/nfa.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{BTreeSet, HashMap, HashSet},
[INFO] [stdout]   |                   ^^^^^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stdout] 4 |     fmt::{self, Display, Formatter},
[INFO] [stdout] 5 |     os::linux::raw::stat,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::os::linux::raw::stat`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/nfa.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     os::linux::raw::stat,
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet`, `HashMap`, `HashSet`, and `os::linux::raw::stat`
[INFO] [stdout]  --> src/nfa.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 |     collections::{BTreeSet, HashMap, HashSet},
[INFO] [stdout]   |                   ^^^^^^^^  ^^^^^^^  ^^^^^^^
[INFO] [stdout] 4 |     fmt::{self, Display, Formatter},
[INFO] [stdout] 5 |     os::linux::raw::stat,
[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: `log::info`
[INFO] [stdout]    --> src/nfa.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     use log::info;
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `connect_other` is never used
[INFO] [stdout]    --> src/nfa.rs:148:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl NFA {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn connect_other(&mut self, other: NFA) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `kind` is never read
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Token {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 5 |     pub kind: String,
[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: struct `Tokens` is never constructed
[INFO] [stdout]   --> src/token.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Tokens {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::os::linux::raw::stat`: these type aliases are no longer supported by the standard library, the `libc` crate on crates.io should be used instead for the correct definitions
[INFO] [stdout]  --> src/nfa.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     os::linux::raw::stat,
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `connect_other` is never used
[INFO] [stdout]    --> src/nfa.rs:148:8
[INFO] [stdout]     |
[INFO] [stdout] 132 | impl NFA {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn connect_other(&mut self, other: NFA) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `kind` is never read
[INFO] [stdout]  --> src/token.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Token {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 5 |     pub kind: String,
[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] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |       let file = String::from_str(
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 23 | |         r#"
[INFO] [stdout] 24 | |         tokens = [
[INFO] [stdout] 25 | |             { kind = "INT", value = "[0-9]+" },
[INFO] [stdout] ...  |
[INFO] [stdout] 31 | |         "#,
[INFO] [stdout] 32 | |     )
[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 `ov_lexical_analysis` (bin "ov_lexical_analysis" test) due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "2b301543295dc50af09f5008803063b1ee8cee93a386af97ba7fbb382a4dbe86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b301543295dc50af09f5008803063b1ee8cee93a386af97ba7fbb382a4dbe86", kill_on_drop: false }`
[INFO] [stdout] 2b301543295dc50af09f5008803063b1ee8cee93a386af97ba7fbb382a4dbe86