[INFO] fetching crate tree_view 0.1.2...
[INFO] checking tree_view-0.1.2 against 1.95.0 for pr-155915
[INFO] extracting crate tree_view 0.1.2 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate tree_view 0.1.2
[INFO] finished tweaking crates.io crate tree_view 0.1.2
[INFO] tweaked toml for crates.io crate tree_view 0.1.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tree_view 0.1.2 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tree_view 0.1.2 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9afaadc04f2dd379d5926475f706858f1f8b3ff5d18456c3ebe3dd8f092d292d
[INFO] running `Command { std: "docker" "start" "-a" "9afaadc04f2dd379d5926475f706858f1f8b3ff5d18456c3ebe3dd8f092d292d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9afaadc04f2dd379d5926475f706858f1f8b3ff5d18456c3ebe3dd8f092d292d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9afaadc04f2dd379d5926475f706858f1f8b3ff5d18456c3ebe3dd8f092d292d", kill_on_drop: false }`
[INFO] [stdout] 9afaadc04f2dd379d5926475f706858f1f8b3ff5d18456c3ebe3dd8f092d292d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3eae27457fe3a87d1c29e66580fafe8ac7ea4dec9b8beb66cc29905c750c576
[INFO] running `Command { std: "docker" "start" "-a" "f3eae27457fe3a87d1c29e66580fafe8ac7ea4dec9b8beb66cc29905c750c576", kill_on_drop: false }`
[INFO] [stderr]     Checking tree_view v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(allocator_api)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tree_view` (bin "tree_view_test" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(allocator_api)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tree_view` (bin "tree_view_test") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f3eae27457fe3a87d1c29e66580fafe8ac7ea4dec9b8beb66cc29905c750c576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3eae27457fe3a87d1c29e66580fafe8ac7ea4dec9b8beb66cc29905c750c576", kill_on_drop: false }`
[INFO] [stdout] f3eae27457fe3a87d1c29e66580fafe8ac7ea4dec9b8beb66cc29905c750c576
