[INFO] fetching crate lovm2_core 0.4.8...
[INFO] checking lovm2_core-0.4.8 against 1.95.0 for pr-155915
[INFO] extracting crate lovm2_core 0.4.8 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate lovm2_core 0.4.8
[INFO] finished tweaking crates.io crate lovm2_core 0.4.8
[INFO] tweaked toml for crates.io crate lovm2_core 0.4.8 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lovm2_core 0.4.8 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding dirs v3.0.2 (available: v6.0.0)
[INFO] [stderr]       Adding indexmap v1.9.3 (available: v2.14.0)
[INFO] [stderr]       Adding libloading v0.6.7 (available: v0.9.0)
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libloading v0.6.7
[INFO] [stderr]   Downloaded lovm2_module v0.1.0
[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] c6f0e023c8bdd01243afc6b3f4eb959cc400560e3c048cc7ef4bbd7012eea98d
[INFO] running `Command { std: "docker" "start" "-a" "c6f0e023c8bdd01243afc6b3f4eb959cc400560e3c048cc7ef4bbd7012eea98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6f0e023c8bdd01243afc6b3f4eb959cc400560e3c048cc7ef4bbd7012eea98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6f0e023c8bdd01243afc6b3f4eb959cc400560e3c048cc7ef4bbd7012eea98d", kill_on_drop: false }`
[INFO] [stdout] c6f0e023c8bdd01243afc6b3f4eb959cc400560e3c048cc7ef4bbd7012eea98d
[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] 1db19406cda50cbcfb25759cfbd473ed1615d51a08e1d3d6c2b7847f2ccd5795
[INFO] running `Command { std: "docker" "start" "-a" "1db19406cda50cbcfb25759cfbd473ed1615d51a08e1d3d6c2b7847f2ccd5795", kill_on_drop: false }`
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking gimli v0.32.3
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking rustc-demangle v0.1.27
[INFO] [stderr]     Checking dirs v3.0.2
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking addr2line v0.25.1
[INFO] [stderr]    Compiling lovm2_module v0.1.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/lovm2_module-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]     Checking backtrace v0.3.76
[INFO] [stderr] error: could not compile `lovm2_module` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1db19406cda50cbcfb25759cfbd473ed1615d51a08e1d3d6c2b7847f2ccd5795", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1db19406cda50cbcfb25759cfbd473ed1615d51a08e1d3d6c2b7847f2ccd5795", kill_on_drop: false }`
[INFO] [stdout] 1db19406cda50cbcfb25759cfbd473ed1615d51a08e1d3d6c2b7847f2ccd5795