[INFO] fetching crate r3_core 0.1.4...
[INFO] testing r3_core-0.1.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate r3_core 0.1.4 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate r3_core 0.1.4
[INFO] finished tweaking crates.io crate r3_core 0.1.4
[INFO] tweaked toml for crates.io crate r3_core 0.1.4 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate r3_core 0.1.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 102 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.10.0)
[INFO] [stderr]       Adding env_logger v0.8.4 (available: v0.11.8)
[INFO] [stderr]       Adding memoffset v0.6.5 (available: v0.9.1)
[INFO] [stderr]       Adding svgbob v0.6.6 (available: v0.6.7)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded phf v0.10.1
[INFO] [stderr]   Downloaded mt-dom v0.15.0
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]   Downloaded sauron-core v0.45.2
[INFO] [stderr]   Downloaded strsim v0.10.0
[INFO] [stderr]   Downloaded svgbobdoc v0.3.0
[INFO] [stderr]   Downloaded ident_case v1.0.1
[INFO] [stderr]   Downloaded elain v0.3.1
[INFO] [stderr]   Downloaded phf_generator v0.10.0
[INFO] [stderr]   Downloaded phf_macros v0.10.0
[INFO] [stderr]   Downloaded siphasher v0.3.11
[INFO] [stderr]   Downloaded nalgebra-macros v0.1.0
[INFO] [stderr]   Downloaded darling_macro v0.14.4
[INFO] [stderr]   Downloaded darling v0.14.4
[INFO] [stderr]   Downloaded simba v0.7.3
[INFO] [stderr]   Downloaded sauron v0.45.2
[INFO] [stderr]   Downloaded quickcheck v1.0.3
[INFO] [stderr]   Downloaded pom v3.4.0
[INFO] [stderr]   Downloaded parry2d v0.8.0
[INFO] [stderr]   Downloaded cfg-if v0.1.10
[INFO] [stderr]   Downloaded svgbob v0.6.6
[INFO] [stderr]   Downloaded macropol v0.1.3
[INFO] [stderr]   Downloaded memoffset v0.6.5
[INFO] [stderr]   Downloaded humantime v2.3.0
[INFO] [stderr]   Downloaded env_logger v0.8.4
[INFO] [stderr]   Downloaded quickcheck_macros v1.1.0
[INFO] [stderr]   Downloaded downcast-rs v1.2.1
[INFO] [stderr]   Downloaded doc-comment v0.3.4
[INFO] [stderr]   Downloaded darling_core v0.14.4
[INFO] [stderr]   Downloaded phf_shared v0.10.0
[INFO] [stderr]   Downloaded tokenlock v0.3.8
[INFO] [stderr]   Downloaded jss v0.5.1
[INFO] [stderr]   Downloaded nalgebra v0.30.1
[INFO] [stderr]   Downloaded bstr v1.12.1
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8678f30a27c70d2a09e540d1d1b37d2886bf81b706a5df5fc428d710dab1505d
[INFO] running `Command { std: "docker" "start" "-a" "8678f30a27c70d2a09e540d1d1b37d2886bf81b706a5df5fc428d710dab1505d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8678f30a27c70d2a09e540d1d1b37d2886bf81b706a5df5fc428d710dab1505d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8678f30a27c70d2a09e540d1d1b37d2886bf81b706a5df5fc428d710dab1505d", kill_on_drop: false }`
[INFO] [stdout] 8678f30a27c70d2a09e540d1d1b37d2886bf81b706a5df5fc428d710dab1505d
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a36cd5b2236e86a419837a03a23d62e1ea0ceb1d0e71ecd7cb0b221f43554114
[INFO] running `Command { std: "docker" "start" "-a" "a36cd5b2236e86a419837a03a23d62e1ea0ceb1d0e71ecd7cb0b221f43554114", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling unicode-width v0.1.14
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling elain v0.3.1
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling rustc_version v0.4.1
[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/memoffset-0.6.5/src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     feature(const_ptr_offset_from, const_refs_to_cell)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_refs_to_cell` has been stable since `1.83.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memoffset` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a36cd5b2236e86a419837a03a23d62e1ea0ceb1d0e71ecd7cb0b221f43554114", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a36cd5b2236e86a419837a03a23d62e1ea0ceb1d0e71ecd7cb0b221f43554114", kill_on_drop: false }`
[INFO] [stdout] a36cd5b2236e86a419837a03a23d62e1ea0ceb1d0e71ecd7cb0b221f43554114
