[INFO] updating cached repository https://github.com/mcon/craftinginterpreters-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 914e696ffb1d82d14e2363d7e404392a24a5d754
[INFO] checking mcon/craftinginterpreters-rust against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcon%2Fcraftinginterpreters-rust" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mcon/craftinginterpreters-rust on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mcon/craftinginterpreters-rust
[INFO] finished tweaking git repo https://github.com/mcon/craftinginterpreters-rust
[INFO] tweaked toml for git repo https://github.com/mcon/craftinginterpreters-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/mcon/craftinginterpreters-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] af141cfd6381f61a15e62741ae2f6c79d2ff4d7120e9f567ea05f05a1093420b
[INFO] running `"docker" "start" "-a" "af141cfd6381f61a15e62741ae2f6c79d2ff4d7120e9f567ea05f05a1093420b"`
[INFO] [stderr]     Checking loxrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::TokenFound`
[INFO] [stderr]  --> src/scanner.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use scanner::TokenParseResult::TokenFound;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::Error`
[INFO] [stderr]  --> src/scanner.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use scanner::TokenParseResult::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::NoToken`
[INFO] [stderr]  --> src/scanner.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use scanner::TokenParseResult::NoToken;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/scanner.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |         if (self_type == discriminant(other)) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/scanner.rs:165:28
[INFO] [stderr]     |
[INFO] [stderr] 165 |             character @ '0'...'9' => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::TokenFound`
[INFO] [stderr]  --> src/scanner.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use scanner::TokenParseResult::TokenFound;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::Error`
[INFO] [stderr]  --> src/scanner.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use scanner::TokenParseResult::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `scanner::TokenParseResult::NoToken`
[INFO] [stderr]  --> src/scanner.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use scanner::TokenParseResult::NoToken;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/scanner.rs:64:12
[INFO] [stderr]    |
[INFO] [stderr] 64 |         if (self_type == discriminant(other)) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/scanner.rs:165:28
[INFO] [stderr]     |
[INFO] [stderr] 165 |             character @ '0'...'9' => {
[INFO] [stderr]     |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/scanner.rs:222:9
[INFO] [stderr]     |
[INFO] [stderr] 213 | /             match string.parse::<f64>() {
[INFO] [stderr] 214 | |                 Ok(result) => return Some(TokenType::NUMBER(result)),
[INFO] [stderr] 215 | |                 Err(_) => {
[INFO] [stderr] 216 | |                     self.errors.push(format!("Unable to parse number on line {}", self.line));
[INFO] [stderr] 217 | |                     return None
[INFO] [stderr] 218 | |                 }
[INFO] [stderr] 219 | |             }
[INFO] [stderr]     | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] ...
[INFO] [stderr] 222 |           self.errors.push(format!("Unknown error parsing number on line {}", self.line));
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |         let mut temp_copy = self.source.clone();
[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: unreachable statement
[INFO] [stderr]    --> src/scanner.rs:222:9
[INFO] [stderr]     |
[INFO] [stderr] 213 | /             match string.parse::<f64>() {
[INFO] [stderr] 214 | |                 Ok(result) => return Some(TokenType::NUMBER(result)),
[INFO] [stderr] 215 | |                 Err(_) => {
[INFO] [stderr] 216 | |                     self.errors.push(format!("Unable to parse number on line {}", self.line));
[INFO] [stderr] 217 | |                     return None
[INFO] [stderr] 218 | |                 }
[INFO] [stderr] 219 | |             }
[INFO] [stderr]     | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] ...
[INFO] [stderr] 222 |           self.errors.push(format!("Unknown error parsing number on line {}", self.line));
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:166:21
[INFO] [stderr]     |
[INFO] [stderr] 166 |                 let mut last_character = character.to_string();
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:172:21
[INFO] [stderr]     |
[INFO] [stderr] 172 |                 let mut last_character = character.to_string();
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:188:17
[INFO] [stderr]     |
[INFO] [stderr] 188 |             let mut string_iter =
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:206:17
[INFO] [stderr]     |
[INFO] [stderr] 206 |             let mut string_iter =
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:229:13
[INFO] [stderr]     |
[INFO] [stderr] 229 |         let mut string_iter =
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TokenParseResult`
[INFO] [stderr]   --> src/scanner.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | enum TokenParseResult {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/scanner.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | #[warn(dead_code)]
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |         let mut temp_copy = self.source.clone();
[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/scanner.rs:166:21
[INFO] [stderr]     |
[INFO] [stderr] 166 |                 let mut last_character = character.to_string();
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:172:21
[INFO] [stderr]     |
[INFO] [stderr] 172 |                 let mut last_character = character.to_string();
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:188:17
[INFO] [stderr]     |
[INFO] [stderr] 188 |             let mut string_iter =
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:206:17
[INFO] [stderr]     |
[INFO] [stderr] 206 |             let mut string_iter =
[INFO] [stderr]     |                 ----^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/scanner.rs:229:13
[INFO] [stderr]     |
[INFO] [stderr] 229 |         let mut string_iter =
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `TokenParseResult`
[INFO] [stderr]   --> src/scanner.rs:80:1
[INFO] [stderr]    |
[INFO] [stderr] 80 | enum TokenParseResult {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/scanner.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | #[warn(dead_code)]
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `"docker" "inspect" "af141cfd6381f61a15e62741ae2f6c79d2ff4d7120e9f567ea05f05a1093420b"`
[INFO] running `"docker" "rm" "-f" "af141cfd6381f61a15e62741ae2f6c79d2ff4d7120e9f567ea05f05a1093420b"`
[INFO] [stdout] af141cfd6381f61a15e62741ae2f6c79d2ff4d7120e9f567ea05f05a1093420b