[INFO] fetching crate rual 0.0.2...
[INFO] checking rual-0.0.2 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate rual 0.0.2 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rual 0.0.2 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rual 0.0.2
[INFO] finished tweaking crates.io crate rual 0.0.2
[INFO] tweaked toml for crates.io crate rual 0.0.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd7cec8e523a620dda6cb2b02af2f68bc91421d94c190397eaaa108d58395336
[INFO] running `Command { std: "docker" "start" "-a" "cd7cec8e523a620dda6cb2b02af2f68bc91421d94c190397eaaa108d58395336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd7cec8e523a620dda6cb2b02af2f68bc91421d94c190397eaaa108d58395336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd7cec8e523a620dda6cb2b02af2f68bc91421d94c190397eaaa108d58395336", kill_on_drop: false }`
[INFO] [stdout] cd7cec8e523a620dda6cb2b02af2f68bc91421d94c190397eaaa108d58395336
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4541fe17f4d03d72bafcbce9924cc16e07689f6deaa5f9d6d3c93cf21be923e
[INFO] running `Command { std: "docker" "start" "-a" "b4541fe17f4d03d72bafcbce9924cc16e07689f6deaa5f9d6d3c93cf21be923e", kill_on_drop: false }`
[INFO] [stderr]     Checking rual v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Punct`
[INFO] [stdout]  --> src/lexing/mod.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::syntax::{Keyword, Punct, Token, TokenType};
[INFO] [stdout]   |                              ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]    --> src/execution/mod.rs:132:5
[INFO] [stdout]     |
[INFO] [stdout] 131 | struct Scope<'t> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 132 |     parent: Option<&'t Scope<'t>>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/execution/mod.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl<'t> Scope<'t> {
[INFO] [stdout]     | ------------------ associated function in this implementation
[INFO] [stdout] 137 |     pub fn new(parent: &'t Scope) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/execution/mod.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.exec_expr(&expr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.exec_expr(&expr);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]    --> src/execution/mod.rs:132:5
[INFO] [stdout]     |
[INFO] [stdout] 131 | struct Scope<'t> {
[INFO] [stdout]     |        ----- field in this struct
[INFO] [stdout] 132 |     parent: Option<&'t Scope<'t>>,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/execution/mod.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl<'t> Scope<'t> {
[INFO] [stdout]     | ------------------ associated function in this implementation
[INFO] [stdout] 137 |     pub fn new(parent: &'t Scope) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/execution/mod.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         self.exec_expr(&expr);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = self.exec_expr(&expr);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "b4541fe17f4d03d72bafcbce9924cc16e07689f6deaa5f9d6d3c93cf21be923e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4541fe17f4d03d72bafcbce9924cc16e07689f6deaa5f9d6d3c93cf21be923e", kill_on_drop: false }`
[INFO] [stdout] b4541fe17f4d03d72bafcbce9924cc16e07689f6deaa5f9d6d3c93cf21be923e