[INFO] cloning repository https://github.com/emigr2k1/myteachr
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emigr2k1/myteachr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femigr2k1%2Fmyteachr"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femigr2k1%2Fmyteachr'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6ced4b074be8f869aadaf4e9988e5e079d00240e
[INFO] checking emigr2k1/myteachr against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femigr2k1%2Fmyteachr" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emigr2k1/myteachr on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/emigr2k1/myteachr
[INFO] finished tweaking git repo https://github.com/emigr2k1/myteachr
[INFO] tweaked toml for git repo https://github.com/emigr2k1/myteachr written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/emigr2k1/myteachr already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6d70afc95335dbdb398934e18202be560e9c3eb1605ff3e3b64cecc6d2739aa1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "6d70afc95335dbdb398934e18202be560e9c3eb1605ff3e3b64cecc6d2739aa1"`
[INFO] [stderr]    Compiling anyhow v1.0.25
[INFO] [stderr]     Checking myteachr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/lexer.rs:32:31
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '0'..='9' | '.' | '-' | '+' => self.tokenize_number()?,
[INFO] [stderr]    |                               ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/lexer.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '0'..='9' | '.' | '-' | '+' => self.tokenize_number()?,
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]   --> src/lexer.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn next_token(&mut self) -> anyhow::Result<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `InfixOp`
[INFO] [stderr]  --> src/tree.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum InfixOp {
[INFO] [stderr]   |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Expression`
[INFO] [stderr]   --> src/tree.rs:10:10
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub enum Expression {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/lexer.rs:32:31
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '0'..='9' | '.' | '-' | '+' => self.tokenize_number()?,
[INFO] [stderr]    |                               ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/lexer.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 |             '0'..='9' | '.' | '-' | '+' => self.tokenize_number()?,
[INFO] [stderr]    |                                     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `input`
[INFO] [stderr]  --> src/lexer.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     input: Peekable<IntoIter<char>>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token`
[INFO] [stderr]   --> src/lexer.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn next_token(&mut self) -> anyhow::Result<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `tokenize_number`
[INFO] [stderr]   --> src/lexer.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn tokenize_number(&mut self) -> anyhow::Result<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `InfixOp`
[INFO] [stderr]  --> src/tree.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub enum InfixOp {
[INFO] [stderr]   |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Expression`
[INFO] [stderr]   --> src/tree.rs:10:10
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub enum Expression {
[INFO] [stderr]    |          ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.15s
[INFO] running `"docker" "inspect" "6d70afc95335dbdb398934e18202be560e9c3eb1605ff3e3b64cecc6d2739aa1"`
[INFO] running `"docker" "rm" "-f" "6d70afc95335dbdb398934e18202be560e9c3eb1605ff3e3b64cecc6d2739aa1"`
[INFO] [stdout] 6d70afc95335dbdb398934e18202be560e9c3eb1605ff3e3b64cecc6d2739aa1