[INFO] fetching crate paillier 0.2.0...
[INFO] testing paillier-0.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate paillier 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate paillier 0.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate paillier 0.2.0
[INFO] finished tweaking crates.io crate paillier 0.2.0
[INFO] tweaked toml for crates.io crate paillier 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-cfg v0.2.0
[INFO] [stderr]   Downloaded ramp v0.5.9
[INFO] [stderr]   Downloaded hamming v0.1.3
[INFO] [stderr]   Downloaded rust-gmp v0.5.0
[INFO] [stderr]   Downloaded framp v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69cf88fff897e0406df1a8d33a267b0bab478971ed9bf349bb56cef211165d03
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "69cf88fff897e0406df1a8d33a267b0bab478971ed9bf349bb56cef211165d03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69cf88fff897e0406df1a8d33a267b0bab478971ed9bf349bb56cef211165d03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69cf88fff897e0406df1a8d33a267b0bab478971ed9bf349bb56cef211165d03", kill_on_drop: false }`
[INFO] [stdout] 69cf88fff897e0406df1a8d33a267b0bab478971ed9bf349bb56cef211165d03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 709b9964aae192507bee68fd1040d1330e3a8f4cd2864fe640dc04155ff010ac
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "709b9964aae192507bee68fd1040d1330e3a8f4cd2864fe640dc04155ff010ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling rust-gmp v0.5.0
[INFO] [stderr]    Compiling paillier v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::ser::Serialize`
[INFO] [stdout]  --> src/encoding/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use serde::ser::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::de::Deserialize`
[INFO] [stdout]  --> src/encoding/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use serde::de::Deserialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::arithimpl::traits::*`
[INFO] [stdout]  --> src/proof/range_proof_ni.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use ::arithimpl::traits::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::core::*`
[INFO] [stdout]  --> src/proof/range_proof_ni.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use ::core::*;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::ser::Serialize`
[INFO] [stdout]   --> src/lib.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | use serde::ser::Serialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::de::Deserialize`
[INFO] [stdout]   --> src/lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | use serde::de::Deserialize;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `paillier`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "709b9964aae192507bee68fd1040d1330e3a8f4cd2864fe640dc04155ff010ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "709b9964aae192507bee68fd1040d1330e3a8f4cd2864fe640dc04155ff010ac", kill_on_drop: false }`
[INFO] [stdout] 709b9964aae192507bee68fd1040d1330e3a8f4cd2864fe640dc04155ff010ac