[INFO] cloning repository https://github.com/tetsuo-cpp/charm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tetsuo-cpp/charm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftetsuo-cpp%2Fcharm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftetsuo-cpp%2Fcharm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f857bb35c53721e3c210d399d74a853eedb0e30
[INFO] checking tetsuo-cpp/charm against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftetsuo-cpp%2Fcharm" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tetsuo-cpp/charm on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tetsuo-cpp/charm
[INFO] finished tweaking git repo https://github.com/tetsuo-cpp/charm
[INFO] tweaked toml for git repo https://github.com/tetsuo-cpp/charm written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/tetsuo-cpp/charm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 562884967e9d405dbd75c8f7dae73378c08c6f01ebc85f0a7bcbc2c1b1751d46
[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" "562884967e9d405dbd75c8f7dae73378c08c6f01ebc85f0a7bcbc2c1b1751d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "562884967e9d405dbd75c8f7dae73378c08c6f01ebc85f0a7bcbc2c1b1751d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "562884967e9d405dbd75c8f7dae73378c08c6f01ebc85f0a7bcbc2c1b1751d46", kill_on_drop: false }`
[INFO] [stdout] 562884967e9d405dbd75c8f7dae73378c08c6f01ebc85f0a7bcbc2c1b1751d46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8b63888a135d55c4e2fc87cc32551686daa64e595260b4d98a562f00742a013
[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" "e8b63888a135d55c4e2fc87cc32551686daa64e595260b4d98a562f00742a013", kill_on_drop: false }`
[INFO] [stderr]     Checking charm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:402:13
[INFO] [stdout]     |
[INFO] [stdout] 402 |         let mut lexer = Lexer::new(source);
[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: variant is never constructed: `If`
[INFO] [stdout]    --> src/lib.rs:416:5
[INFO] [stdout]     |
[INFO] [stdout] 416 |     If(IfNode<'a>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinOp`
[INFO] [stdout]    --> src/lib.rs:418:5
[INFO] [stdout]     |
[INFO] [stdout] 418 |     BinOp(BinOpNode<'a>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `condition`
[INFO] [stdout]    --> src/lib.rs:422:5
[INFO] [stdout]     |
[INFO] [stdout] 422 |     condition: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `then_block`
[INFO] [stdout]    --> src/lib.rs:423:5
[INFO] [stdout]     |
[INFO] [stdout] 423 |     then_block: Vec<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `else_block`
[INFO] [stdout]    --> src/lib.rs:424:5
[INFO] [stdout]     |
[INFO] [stdout] 424 |     else_block: Vec<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]    --> src/lib.rs:428:5
[INFO] [stdout]     |
[INFO] [stdout] 428 |     name: &'a [u8],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rhs`
[INFO] [stdout]    --> src/lib.rs:429:5
[INFO] [stdout]     |
[INFO] [stdout] 429 |     rhs: Box<Option<Ast<'a>>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `op`
[INFO] [stdout]    --> src/lib.rs:433:5
[INFO] [stdout]     |
[INFO] [stdout] 433 |     op: Token<'a>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `lhs`
[INFO] [stdout]    --> src/lib.rs:434:5
[INFO] [stdout]     |
[INFO] [stdout] 434 |     lhs: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rhs`
[INFO] [stdout]    --> src/lib.rs:435:5
[INFO] [stdout]     |
[INFO] [stdout] 435 |     rhs: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_expr`
[INFO] [stdout]    --> src/lib.rs:488:8
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn parse_expr(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_addition`
[INFO] [stdout]    --> src/lib.rs:492:8
[INFO] [stdout]     |
[INFO] [stdout] 492 |     fn parse_addition(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_multiplication`
[INFO] [stdout]    --> src/lib.rs:510:8
[INFO] [stdout]     |
[INFO] [stdout] 510 |     fn parse_multiplication(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse`
[INFO] [stdout]    --> src/lib.rs:400:8
[INFO] [stdout]     |
[INFO] [stdout] 400 |     fn parse<'a>(source: &'a str) -> Result<Vec<Box<Ast>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `If`
[INFO] [stdout]    --> src/lib.rs:416:5
[INFO] [stdout]     |
[INFO] [stdout] 416 |     If(IfNode<'a>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinOp`
[INFO] [stdout]    --> src/lib.rs:418:5
[INFO] [stdout]     |
[INFO] [stdout] 418 |     BinOp(BinOpNode<'a>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `condition`
[INFO] [stdout]    --> src/lib.rs:422:5
[INFO] [stdout]     |
[INFO] [stdout] 422 |     condition: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `then_block`
[INFO] [stdout]    --> src/lib.rs:423:5
[INFO] [stdout]     |
[INFO] [stdout] 423 |     then_block: Vec<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `else_block`
[INFO] [stdout]    --> src/lib.rs:424:5
[INFO] [stdout]     |
[INFO] [stdout] 424 |     else_block: Vec<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]    --> src/lib.rs:428:5
[INFO] [stdout]     |
[INFO] [stdout] 428 |     name: &'a [u8],
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rhs`
[INFO] [stdout]    --> src/lib.rs:429:5
[INFO] [stdout]     |
[INFO] [stdout] 429 |     rhs: Box<Option<Ast<'a>>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `op`
[INFO] [stdout]    --> src/lib.rs:433:5
[INFO] [stdout]     |
[INFO] [stdout] 433 |     op: Token<'a>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `lhs`
[INFO] [stdout]    --> src/lib.rs:434:5
[INFO] [stdout]     |
[INFO] [stdout] 434 |     lhs: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rhs`
[INFO] [stdout]    --> src/lib.rs:435:5
[INFO] [stdout]     |
[INFO] [stdout] 435 |     rhs: Box<Ast<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_expr`
[INFO] [stdout]    --> src/lib.rs:488:8
[INFO] [stdout]     |
[INFO] [stdout] 488 |     fn parse_expr(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_addition`
[INFO] [stdout]    --> src/lib.rs:492:8
[INFO] [stdout]     |
[INFO] [stdout] 492 |     fn parse_addition(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_multiplication`
[INFO] [stdout]    --> src/lib.rs:510:8
[INFO] [stdout]     |
[INFO] [stdout] 510 |     fn parse_multiplication(&mut self) -> Result<Box<Ast<'a>>, Box<dyn Error>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "e8b63888a135d55c4e2fc87cc32551686daa64e595260b4d98a562f00742a013", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8b63888a135d55c4e2fc87cc32551686daa64e595260b4d98a562f00742a013", kill_on_drop: false }`
[INFO] [stdout] e8b63888a135d55c4e2fc87cc32551686daa64e595260b4d98a562f00742a013