[INFO] fetching crate buguc 0.3.0...
[INFO] checking buguc-0.3.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate buguc 0.3.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate buguc 0.3.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buguc 0.3.0
[INFO] finished tweaking crates.io crate buguc 0.3.0
[INFO] tweaked toml for crates.io crate buguc 0.3.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate buguc 0.3.0 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5acf5a6d7148126eb534f051c819c8b843f6a985756502704c474d6cb9bced44
[INFO] running `Command { std: "docker" "start" "-a" "5acf5a6d7148126eb534f051c819c8b843f6a985756502704c474d6cb9bced44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5acf5a6d7148126eb534f051c819c8b843f6a985756502704c474d6cb9bced44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5acf5a6d7148126eb534f051c819c8b843f6a985756502704c474d6cb9bced44", kill_on_drop: false }`
[INFO] [stdout] 5acf5a6d7148126eb534f051c819c8b843f6a985756502704c474d6cb9bced44
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d7992cb22ea4ec38ddf33ccd3e82168caae97e1e3eac50b9938d8c83b8a10d7
[INFO] running `Command { std: "docker" "start" "-a" "1d7992cb22ea4ec38ddf33ccd3e82168caae97e1e3eac50b9938d8c83b8a10d7", kill_on_drop: false }`
[INFO] [stderr]     Checking buguc v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `edges` is never read
[INFO] [stdout]    --> src/ir_handle/dataflow.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | pub struct BasicBlock<'a> {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 177 |    pub stmts: Vec<&'a IrStmt>,
[INFO] [stdout] 178 |    pub edges: Vec<&'a BasicBlock<'a>>,  // from none,branch,cond branch
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BasicBlock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `edges` is never read
[INFO] [stdout]    --> src/ir_handle/dataflow.rs:178:8
[INFO] [stdout]     |
[INFO] [stdout] 176 | pub struct BasicBlock<'a> {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 177 |    pub stmts: Vec<&'a IrStmt>,
[INFO] [stdout] 178 |    pub edges: Vec<&'a BasicBlock<'a>>,  // from none,branch,cond branch
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BasicBlock` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "1d7992cb22ea4ec38ddf33ccd3e82168caae97e1e3eac50b9938d8c83b8a10d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d7992cb22ea4ec38ddf33ccd3e82168caae97e1e3eac50b9938d8c83b8a10d7", kill_on_drop: false }`
[INFO] [stdout] 1d7992cb22ea4ec38ddf33ccd3e82168caae97e1e3eac50b9938d8c83b8a10d7