[INFO] fetching crate desert 2.0.1...
[INFO] checking desert-2.0.1 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate desert 2.0.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate desert 2.0.1 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate desert 2.0.1
[INFO] finished tweaking crates.io crate desert 2.0.1
[INFO] tweaked toml for crates.io crate desert 2.0.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate desert 2.0.1 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 851a583fcd54a12873da7346cddd200206b01e4e14acc5cdc0ea50034fdcc33c
[INFO] running `Command { std: "docker" "start" "-a" "851a583fcd54a12873da7346cddd200206b01e4e14acc5cdc0ea50034fdcc33c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "851a583fcd54a12873da7346cddd200206b01e4e14acc5cdc0ea50034fdcc33c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "851a583fcd54a12873da7346cddd200206b01e4e14acc5cdc0ea50034fdcc33c", kill_on_drop: false }`
[INFO] [stdout] 851a583fcd54a12873da7346cddd200206b01e4e14acc5cdc0ea50034fdcc33c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 980f2d7bc09f80c084c6a0e92ceb869f8ae53b09f6c50f4a86eae2a8871ff99c
[INFO] running `Command { std: "docker" "start" "-a" "980f2d7bc09f80c084c6a0e92ceb869f8ae53b09f6c50f4a86eae2a8871ff99c", kill_on_drop: false }`
[INFO] [stderr]     Checking desert v2.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `backtrace` found for struct `Box<dyn std::error::Error + Send + Sync>` in the current scope
[INFO] [stdout]   --> examples/err.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     match e.backtrace() {
[INFO] [stdout]    |             ^^^^^^^^^ method not found in `Box<dyn Error + Send + Sync>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `desert` (example "err") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "980f2d7bc09f80c084c6a0e92ceb869f8ae53b09f6c50f4a86eae2a8871ff99c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "980f2d7bc09f80c084c6a0e92ceb869f8ae53b09f6c50f4a86eae2a8871ff99c", kill_on_drop: false }`
[INFO] [stdout] 980f2d7bc09f80c084c6a0e92ceb869f8ae53b09f6c50f4a86eae2a8871ff99c
[INFO] checking desert-2.0.1 against try#dae34b759e282c069aa28752564694effd121a63 for pr-125384
[INFO] extracting crate desert 2.0.1 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate desert 2.0.1 on toolchain dae34b759e282c069aa28752564694effd121a63
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate desert 2.0.1
[INFO] finished tweaking crates.io crate desert 2.0.1
[INFO] tweaked toml for crates.io crate desert 2.0.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate desert 2.0.1 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" "+dae34b759e282c069aa28752564694effd121a63" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7fe3291d59988abe7b7ea063c51a473a3385c063fed13072990a9a566bf10b38
[INFO] running `Command { std: "docker" "start" "-a" "7fe3291d59988abe7b7ea063c51a473a3385c063fed13072990a9a566bf10b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7fe3291d59988abe7b7ea063c51a473a3385c063fed13072990a9a566bf10b38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fe3291d59988abe7b7ea063c51a473a3385c063fed13072990a9a566bf10b38", kill_on_drop: false }`
[INFO] [stdout] 7fe3291d59988abe7b7ea063c51a473a3385c063fed13072990a9a566bf10b38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+dae34b759e282c069aa28752564694effd121a63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e173d0e97b6b0e4f059b7ff501ee120a619ed2f8ee56ea06513634d2eec38e58
[INFO] running `Command { std: "docker" "start" "-a" "e173d0e97b6b0e4f059b7ff501ee120a619ed2f8ee56ea06513634d2eec38e58", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "e173d0e97b6b0e4f059b7ff501ee120a619ed2f8ee56ea06513634d2eec38e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e173d0e97b6b0e4f059b7ff501ee120a619ed2f8ee56ea06513634d2eec38e58", kill_on_drop: false }`
[INFO] [stdout] e173d0e97b6b0e4f059b7ff501ee120a619ed2f8ee56ea06513634d2eec38e58