[INFO] cloning repository https://github.com/haumea-lang/haumea-rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/haumea-lang/haumea-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaumea-lang%2Fhaumea-rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaumea-lang%2Fhaumea-rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b50ebe11ad0ec2e2b702016790b48c09c3950761 [INFO] testing haumea-lang/haumea-rs against beta-2022-02-22 for beta-1.60-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhaumea-lang%2Fhaumea-rs" "/workspace/builds/worker-11/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/haumea-lang/haumea-rs on toolchain beta-2022-02-22 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/haumea-lang/haumea-rs [INFO] finished tweaking git repo https://github.com/haumea-lang/haumea-rs [INFO] tweaked toml for git repo https://github.com/haumea-lang/haumea-rs written to /workspace/builds/worker-11/source/Cargo.toml [INFO] crate git repo https://github.com/haumea-lang/haumea-rs already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", 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] 6726aaecb6a86a79b79a228b478d2c2bd95ea51d37acc35e80c59b9f754b8906 [INFO] running `Command { std: "docker" "start" "-a" "6726aaecb6a86a79b79a228b478d2c2bd95ea51d37acc35e80c59b9f754b8906", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6726aaecb6a86a79b79a228b478d2c2bd95ea51d37acc35e80c59b9f754b8906", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6726aaecb6a86a79b79a228b478d2c2bd95ea51d37acc35e80c59b9f754b8906", kill_on_drop: false }` [INFO] [stdout] 6726aaecb6a86a79b79a228b478d2c2bd95ea51d37acc35e80c59b9f754b8906 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3c9171cf0ef9abe2f355abc53e9d4e53253012e02a85d2fc68e4bd457767adb6 [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" "3c9171cf0ef9abe2f355abc53e9d4e53253012e02a85d2fc68e4bd457767adb6", kill_on_drop: false }` [INFO] [stderr] Compiling haumea v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:179:16 [INFO] [stdout] | [INFO] [stdout] 179 | fn match_token(mut token_stream: &mut Vec, expected: &Token) -> Result { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:339:18 [INFO] [stdout] | [INFO] [stdout] 339 | fn parse_declare(mut token_stream: &mut Vec) -> Statement { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/parser.rs:191:26 [INFO] [stdout] | [INFO] [stdout] 191 | Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: the panic!() macro supports formatting, so there's no need for the format!() macro here [INFO] [stdout] help: remove the `format!(..)` macro call [INFO] [stdout] | [INFO] [stdout] 191 - Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] 191 + Err(t) => panic!("Expected {:?}, but found {:?}!", expected, t), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.56s [INFO] running `Command { std: "docker" "inspect" "3c9171cf0ef9abe2f355abc53e9d4e53253012e02a85d2fc68e4bd457767adb6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c9171cf0ef9abe2f355abc53e9d4e53253012e02a85d2fc68e4bd457767adb6", kill_on_drop: false }` [INFO] [stdout] 3c9171cf0ef9abe2f355abc53e9d4e53253012e02a85d2fc68e4bd457767adb6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", 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] c0df29dfb75588f3d601b6ec25b39bfbdf7c38a96b162e3b82442cf9c8f7388a [INFO] running `Command { std: "docker" "start" "-a" "c0df29dfb75588f3d601b6ec25b39bfbdf7c38a96b162e3b82442cf9c8f7388a", kill_on_drop: false }` [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:179:16 [INFO] [stdout] | [INFO] [stdout] 179 | fn match_token(mut token_stream: &mut Vec, expected: &Token) -> Result { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:339:18 [INFO] [stdout] | [INFO] [stdout] 339 | fn parse_declare(mut token_stream: &mut Vec) -> Statement { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/parser.rs:191:26 [INFO] [stdout] | [INFO] [stdout] 191 | Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: the panic!() macro supports formatting, so there's no need for the format!() macro here [INFO] [stdout] help: remove the `format!(..)` macro call [INFO] [stdout] | [INFO] [stdout] 191 - Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] 191 + Err(t) => panic!("Expected {:?}, but found {:?}!", expected, t), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling haumea v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:179:16 [INFO] [stdout] | [INFO] [stdout] 179 | fn match_token(mut token_stream: &mut Vec, expected: &Token) -> Result { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/parser.rs:339:18 [INFO] [stdout] | [INFO] [stdout] 339 | fn parse_declare(mut token_stream: &mut Vec) -> Statement { [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: panic message is not a string literal [INFO] [stdout] --> src/parser.rs:191:26 [INFO] [stdout] | [INFO] [stdout] 191 | Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stdout] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stdout] = note: for more information, see [INFO] [stdout] = note: the panic!() macro supports formatting, so there's no need for the format!() macro here [INFO] [stdout] help: remove the `format!(..)` macro call [INFO] [stdout] | [INFO] [stdout] 191 - Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stdout] 191 + Err(t) => panic!("Expected {:?}, but found {:?}!", expected, t), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 3.32s [INFO] running `Command { std: "docker" "inspect" "c0df29dfb75588f3d601b6ec25b39bfbdf7c38a96b162e3b82442cf9c8f7388a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c0df29dfb75588f3d601b6ec25b39bfbdf7c38a96b162e3b82442cf9c8f7388a", kill_on_drop: false }` [INFO] [stdout] c0df29dfb75588f3d601b6ec25b39bfbdf7c38a96b162e3b82442cf9c8f7388a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 0d77cdc129a89d67639f704630d5c1d2ead2803e954503d125e7ec8504b23a27 [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" "0d77cdc129a89d67639f704630d5c1d2ead2803e954503d125e7ec8504b23a27", kill_on_drop: false }` [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/parser.rs:179:16 [INFO] [stderr] | [INFO] [stderr] 179 | fn match_token(mut token_stream: &mut Vec, expected: &Token) -> Result { [INFO] [stderr] | ----^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/parser.rs:339:18 [INFO] [stderr] | [INFO] [stderr] 339 | fn parse_declare(mut token_stream: &mut Vec) -> Statement { [INFO] [stderr] | ----^^^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: panic message is not a string literal [INFO] [stderr] --> src/parser.rs:191:26 [INFO] [stderr] | [INFO] [stderr] 191 | Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_fmt_panics)]` on by default [INFO] [stderr] = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021 [INFO] [stderr] = note: for more information, see [INFO] [stderr] = note: the panic!() macro supports formatting, so there's no need for the format!() macro here [INFO] [stderr] help: remove the `format!(..)` macro call [INFO] [stderr] | [INFO] [stderr] 191 - Err(t) => panic!(format!("Expected {:?}, but found {:?}!", expected, t)), [INFO] [stderr] 191 + Err(t) => panic!("Expected {:?}, but found {:?}!", expected, t), [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: `haumea` (lib) generated 3 warnings [INFO] [stderr] warning: `haumea` (lib test) generated 3 warnings (3 duplicates) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/haumea-cfe4a16e1a3f997a) [INFO] [stdout] [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/haumea-9cbe715274ec7f77) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [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; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running tests/test_codegen.rs (/opt/rustwide/target/debug/deps/test_codegen-5230857852366345) [INFO] [stdout] [INFO] [stderr] Running tests/test_parser.rs (/opt/rustwide/target/debug/deps/test_parser-822c45d47bbcb167) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test test_display_addition ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running tests/test_scanner.rs (/opt/rustwide/target/debug/deps/test_scanner-4ec359d110b8b583) [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stderr] Doc-tests haumea [INFO] [stdout] test test_comments ... ok [INFO] [stdout] test test_scanner_simple ... ok [INFO] [stdout] test test_keywords ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test src/scanner.rs - scanner::Scanner::next (line 325) ... FAILED [INFO] [stdout] test src/scanner.rs - scanner::Scanner::next_token (line 156) ... ok [INFO] [stdout] test src/scanner.rs - scanner::Scanner::new (line 126) ... ok [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/scanner.rs - scanner::Scanner::next (line 325) stdout ---- [INFO] [stdout] error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable [INFO] [stdout] --> src/scanner.rs:328:13 [INFO] [stdout] | [INFO] [stdout] 5 | let s = Scanner::new("1 + 1"); [INFO] [stdout] | - help: consider changing this to be mutable: `mut s` [INFO] [stdout] 6 | assert_eq!(s.next(), Some(Token::Number(1, ScanState::empty()))); [INFO] [stdout] | ^^^^^^^^ cannot borrow as mutable [INFO] [stdout] [INFO] [stdout] error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable [INFO] [stdout] --> src/scanner.rs:329:13 [INFO] [stdout] | [INFO] [stdout] 5 | let s = Scanner::new("1 + 1"); [INFO] [stdout] | - help: consider changing this to be mutable: `mut s` [INFO] [stdout] 6 | assert_eq!(s.next(), Some(Token::Number(1, ScanState::empty()))); [INFO] [stdout] 7 | assert_eq!(s.next(), Some(Token::Operator("+".to_string(), ScanState::empty()))); [INFO] [stdout] | ^^^^^^^^ cannot borrow as mutable [INFO] [stdout] [INFO] [stdout] error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable [INFO] [stdout] --> src/scanner.rs:330:13 [INFO] [stdout] | [INFO] [stdout] 5 | let s = Scanner::new("1 + 1"); [INFO] [stdout] | - help: consider changing this to be mutable: `mut s` [INFO] [stdout] ... [INFO] [stdout] 8 | assert_eq!(s.next(), Some(Token::Number(1, ScanState::empty()))); [INFO] [stdout] | ^^^^^^^^ cannot borrow as mutable [INFO] [stdout] [INFO] [stdout] error[E0596]: cannot borrow `s` as mutable, as it is not declared as mutable [INFO] [stdout] --> src/scanner.rs:331:13 [INFO] [stdout] | [INFO] [stdout] 5 | let s = Scanner::new("1 + 1"); [INFO] [stdout] | - help: consider changing this to be mutable: `mut s` [INFO] [stdout] ... [INFO] [stdout] 9 | assert_eq!(s.next(), None); [INFO] [stdout] | ^^^^^^^^ cannot borrow as mutable [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0596`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/scanner.rs - scanner::Scanner::next (line 325) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.17s [INFO] [stdout] [INFO] [stderr] error: test failed, to rerun pass '--doc' [INFO] running `Command { std: "docker" "inspect" "0d77cdc129a89d67639f704630d5c1d2ead2803e954503d125e7ec8504b23a27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d77cdc129a89d67639f704630d5c1d2ead2803e954503d125e7ec8504b23a27", kill_on_drop: false }` [INFO] [stdout] 0d77cdc129a89d67639f704630d5c1d2ead2803e954503d125e7ec8504b23a27