[INFO] fetching crate user-mode-riscv 0.1.0...
[INFO] checking user-mode-riscv-0.1.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate user-mode-riscv 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate user-mode-riscv 0.1.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate user-mode-riscv 0.1.0
[INFO] finished tweaking crates.io crate user-mode-riscv 0.1.0
[INFO] tweaked toml for crates.io crate user-mode-riscv 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zero v0.1.2
[INFO] [stderr]   Downloaded xmas-elf v0.7.0
[INFO] [stderr]   Downloaded elfloader v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f111f7760b43de701bba7848043b5be38e2264e48c82fc8dc3e3840f86fa855c
[INFO] running `Command { std: "docker" "start" "-a" "f111f7760b43de701bba7848043b5be38e2264e48c82fc8dc3e3840f86fa855c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f111f7760b43de701bba7848043b5be38e2264e48c82fc8dc3e3840f86fa855c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f111f7760b43de701bba7848043b5be38e2264e48c82fc8dc3e3840f86fa855c", kill_on_drop: false }`
[INFO] [stdout] f111f7760b43de701bba7848043b5be38e2264e48c82fc8dc3e3840f86fa855c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ae0e0217c8da6e98f18b87d38e4d780b6f85e62d8017a48518765b452eff70f
[INFO] running `Command { std: "docker" "start" "-a" "9ae0e0217c8da6e98f18b87d38e4d780b6f85e62d8017a48518765b452eff70f", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking zero v0.1.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking user-mode-riscv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking xmas-elf v0.7.0
[INFO] [stdout] warning: field is never read: `stack`
[INFO] [stdout]    --> src/cpu.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     stack: Option<Vec<u8>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking elfloader v0.11.0
[INFO] [stdout] warning: field is never read: `stack`
[INFO] [stdout]    --> src/cpu.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     stack: Option<Vec<u8>>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "9ae0e0217c8da6e98f18b87d38e4d780b6f85e62d8017a48518765b452eff70f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ae0e0217c8da6e98f18b87d38e4d780b6f85e62d8017a48518765b452eff70f", kill_on_drop: false }`
[INFO] [stdout] 9ae0e0217c8da6e98f18b87d38e4d780b6f85e62d8017a48518765b452eff70f