[INFO] cloning repository https://github.com/tmenges/rust-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tmenges/rust-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmenges%2Frust-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmenges%2Frust-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d89b11e064c20cf58516e27dac36a89012f8aba9
[INFO] checking tmenges/rust-lox against try#af54b6062f33b99e418444700f3a823ef0214052 for pr-138952
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmenges%2Frust-lox" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tmenges/rust-lox on toolchain af54b6062f33b99e418444700f3a823ef0214052
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tmenges/rust-lox
[INFO] finished tweaking git repo https://github.com/tmenges/rust-lox
[INFO] tweaked toml for git repo https://github.com/tmenges/rust-lox written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tmenges/rust-lox 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" "+af54b6062f33b99e418444700f3a823ef0214052" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 53838474c25627f1eb1352ae57fc80ff9f24c03523d58d0ce16bfe8c66e4957d
[INFO] running `Command { std: "docker" "start" "-a" "53838474c25627f1eb1352ae57fc80ff9f24c03523d58d0ce16bfe8c66e4957d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53838474c25627f1eb1352ae57fc80ff9f24c03523d58d0ce16bfe8c66e4957d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53838474c25627f1eb1352ae57fc80ff9f24c03523d58d0ce16bfe8c66e4957d", kill_on_drop: false }`
[INFO] [stdout] 53838474c25627f1eb1352ae57fc80ff9f24c03523d58d0ce16bfe8c66e4957d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+af54b6062f33b99e418444700f3a823ef0214052" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c684399542f75f08b423870981ceb68bba867397ff9469e39123f4e2ef285a12
[INFO] running `Command { std: "docker" "start" "-a" "c684399542f75f08b423870981ceb68bba867397ff9469e39123f4e2ef285a12", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Scanner` is never constructed
[INFO] [stdout]  --> src/scanner.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Scanner {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `init_scanner` is never used
[INFO] [stdout]  --> src/scanner.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn init_scanner(source: String) -> Box<Scanner> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/scanner.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Scanner {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 14 |     fn new(source: String) -> Scanner {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn is_at_end(&self) -> bool { self.current == self.source.len() }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 24 |
[INFO] [stdout] 25 |     fn advance(&mut self) -> char {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn peek(&self) -> char {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     fn peek_next(&self) -> char {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn match_(&mut self, expected: char) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn skip_whitespace(&mut self) -> () {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_alpha` is never used
[INFO] [stdout]   --> src/scanner.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn is_alpha(c: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_digit` is never used
[INFO] [stdout]   --> src/scanner.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn is_digit(c: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `start` is never read
[INFO] [stdout]  --> src/scanner.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Scanner {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 3 |     source: Vec<char>,
[INFO] [stdout] 4 |     start: usize,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `init_scanner` is never used
[INFO] [stdout]  --> src/scanner.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn init_scanner(source: String) -> Box<Scanner> {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `match_` is never used
[INFO] [stdout]   --> src/scanner.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Scanner {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn match_(&mut self, expected: char) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_digit` is never used
[INFO] [stdout]   --> src/scanner.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn is_digit(c: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "c684399542f75f08b423870981ceb68bba867397ff9469e39123f4e2ef285a12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c684399542f75f08b423870981ceb68bba867397ff9469e39123f4e2ef285a12", kill_on_drop: false }`
[INFO] [stdout] c684399542f75f08b423870981ceb68bba867397ff9469e39123f4e2ef285a12