[INFO] cloning repository https://github.com/jameshiew/crust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jameshiew/crust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjameshiew%2Fcrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjameshiew%2Fcrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f14616799c78c518489ed4ba5c6b65db64ed3ac
[INFO] testing jameshiew/crust against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjameshiew%2Fcrust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jameshiew/crust on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jameshiew/crust
[INFO] finished tweaking git repo https://github.com/jameshiew/crust
[INFO] tweaked toml for git repo https://github.com/jameshiew/crust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jameshiew/crust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 086b9446ceccb6cb1e148ea81584c9abb52093d7439dba449491c8273580992c
[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" "086b9446ceccb6cb1e148ea81584c9abb52093d7439dba449491c8273580992c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "086b9446ceccb6cb1e148ea81584c9abb52093d7439dba449491c8273580992c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086b9446ceccb6cb1e148ea81584c9abb52093d7439dba449491c8273580992c", kill_on_drop: false }`
[INFO] [stdout] 086b9446ceccb6cb1e148ea81584c9abb52093d7439dba449491c8273580992c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb379875de5fe6ca15c96132d7560ba7d8d45bcacc1bec4ef6a29c5054631b01
[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" "bb379875de5fe6ca15c96132d7560ba7d8d45bcacc1bec4ef6a29c5054631b01", kill_on_drop: false }`
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling libc v0.2.34
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling crust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.26s
[INFO] running `Command { std: "docker" "inspect" "bb379875de5fe6ca15c96132d7560ba7d8d45bcacc1bec4ef6a29c5054631b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb379875de5fe6ca15c96132d7560ba7d8d45bcacc1bec4ef6a29c5054631b01", kill_on_drop: false }`
[INFO] [stdout] bb379875de5fe6ca15c96132d7560ba7d8d45bcacc1bec4ef6a29c5054631b01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d6b9aa82b535d4ec23bc25d97377182e893191f22b71a06a238c3804f56a780
[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" "9d6b9aa82b535d4ec23bc25d97377182e893191f22b71a06a238c3804f56a780", kill_on_drop: false }`
[INFO] [stderr]    Compiling crust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lexer.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 | /         lazy_static! {
[INFO] [stdout] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stdout] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stdout] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stdout] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stdout] 46 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "9d6b9aa82b535d4ec23bc25d97377182e893191f22b71a06a238c3804f56a780", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d6b9aa82b535d4ec23bc25d97377182e893191f22b71a06a238c3804f56a780", kill_on_drop: false }`
[INFO] [stdout] 9d6b9aa82b535d4ec23bc25d97377182e893191f22b71a06a238c3804f56a780
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 91e9c9d99b70dafaac91a56a7911cb8bce15eb7f94716644ee6cf344b9736113
[INFO] running `Command { std: "docker" "start" "-a" "91e9c9d99b70dafaac91a56a7911cb8bce15eb7f94716644ee6cf344b9736113", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lexer.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         lazy_static! {
[INFO] [stderr] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stderr] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stderr] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stderr] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stderr] 46 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lexer.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         lazy_static! {
[INFO] [stderr] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stderr] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stderr] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stderr] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stderr] 46 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lexer.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         lazy_static! {
[INFO] [stderr] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stderr] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stderr] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stderr] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stderr] 46 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lexer.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 | /         lazy_static! {
[INFO] [stderr] 42 | |             static ref INT_KEYWORD: Regex = Regex::new(r"^int$").unwrap();
[INFO] [stderr] 43 | |             static ref RETURN_KEYWORD: Regex = Regex::new(r"^return$").unwrap();
[INFO] [stderr] 44 | |             static ref IDENTIFIER: Regex = Regex::new(r"^[a-zA-Z]\w*$").unwrap();
[INFO] [stderr] 45 | |             static ref INTEGER_LITERAL: Regex = Regex::new(r"^[0-9]+$").unwrap();
[INFO] [stderr] 46 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/crust-aa9c7b671c2e53b6
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "91e9c9d99b70dafaac91a56a7911cb8bce15eb7f94716644ee6cf344b9736113", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91e9c9d99b70dafaac91a56a7911cb8bce15eb7f94716644ee6cf344b9736113", kill_on_drop: false }`
[INFO] [stdout] 91e9c9d99b70dafaac91a56a7911cb8bce15eb7f94716644ee6cf344b9736113