[INFO] updating cached repository https://github.com/rustyhorde/twists
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4490db4201265c28c9f05f469d0d010181f65b22
[INFO] testing rustyhorde/twists against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frustyhorde%2Ftwists" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rustyhorde/twists on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/rustyhorde/twists
[INFO] finished tweaking git repo https://github.com/rustyhorde/twists
[INFO] tweaked toml for git repo https://github.com/rustyhorde/twists written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/rustyhorde/twists already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 422965b2f7da7e3489b31818d7960c27a462ba745e3b6ccc02d08d2cc252de7c
[INFO] running `"docker" "start" "-a" "422965b2f7da7e3489b31818d7960c27a462ba745e3b6ccc02d08d2cc252de7c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling cfg-if v0.1.0
[INFO] [stderr]    Compiling num-traits v0.1.37
[INFO] [stderr]    Compiling lazy_static v0.2.6
[INFO] [stderr]    Compiling byteorder v1.0.0
[INFO] [stderr]    Compiling log v0.3.7
[INFO] [stderr]    Compiling futures v0.1.13
[INFO] [stderr]    Compiling lazycell v0.4.0
[INFO] [stderr]    Compiling slog v1.5.2
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling rayon-core v1.0.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.4
[INFO] [stderr]    Compiling openssl v0.9.10
[INFO] [stderr]    Compiling serde v0.9.13
[INFO] [stderr]    Compiling untrusted v0.3.2
[INFO] [stderr]    Compiling regex-syntax v0.4.0
[INFO] [stderr]    Compiling slog v2.0.0-3.1
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr] error[E0277]: `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-1.5.2/src/ser.rs:228:6
[INFO] [stderr]     |
[INFO] [stderr] 120 | pub trait SyncSerialize: Send + Sync + 'static + Serialize {}
[INFO] [stderr]     |                                 ---- required by this bound in `ser::SyncSerialize`
[INFO] [stderr] ...
[INFO] [stderr] 228 | impl SyncSerialize for fmt::Arguments<'static> {}
[INFO] [stderr]     |      ^^^^^^^^^^^^^ `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stderr]     |
[INFO] [stderr]     = help: within `core::fmt::Arguments<'static>`, the trait `core::marker::Sync` is not implemented for `core::fmt::Opaque`
[INFO] [stderr]     = note: required because it appears within the type `&'static core::fmt::Opaque`
[INFO] [stderr]     = note: required because it appears within the type `core::fmt::ArgumentV1<'static>`
[INFO] [stderr]     = note: required because it appears within the type `[core::fmt::ArgumentV1<'static>]`
[INFO] [stderr]     = note: required because it appears within the type `&'static [core::fmt::ArgumentV1<'static>]`
[INFO] [stderr]     = note: required because it appears within the type `core::fmt::Arguments<'static>`
[INFO] [stderr] 
[INFO] [stderr]    Compiling vec_map v0.7.0
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `slog`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0446]: private type `NeverStruct` in public interface
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-2.0.0-3.1/src/lib.rs:988:5
[INFO] [stderr]      |
[INFO] [stderr] 988  |     type Err = Never;
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stderr] ...
[INFO] [stderr] 2650 | struct NeverStruct(());
[INFO] [stderr]      | - `NeverStruct` declared as private
[INFO] [stderr] 
[INFO] [stderr] error[E0446]: private type `NeverStruct` in public interface
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-2.0.0-3.1/src/lib.rs:1271:5
[INFO] [stderr]      |
[INFO] [stderr] 1271 |     type Err = Never;
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stderr] ...
[INFO] [stderr] 2650 | struct NeverStruct(());
[INFO] [stderr]      | - `NeverStruct` declared as private
[INFO] [stderr] 
[INFO] [stderr] error[E0446]: private type `NeverStruct` in public interface
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-2.0.0-3.1/src/lib.rs:1434:5
[INFO] [stderr]      |
[INFO] [stderr] 1434 |     type Err = Never;
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stderr] ...
[INFO] [stderr] 2650 | struct NeverStruct(());
[INFO] [stderr]      | - `NeverStruct` declared as private
[INFO] [stderr] 
[INFO] [stderr] error[E0446]: private type `NeverStruct` in public interface
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-2.0.0-3.1/src/lib.rs:1466:5
[INFO] [stderr]      |
[INFO] [stderr] 1466 |     type Err = Never;
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^ can't leak private type
[INFO] [stderr] ...
[INFO] [stderr] 2650 | struct NeverStruct(());
[INFO] [stderr]      | - `NeverStruct` declared as private
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0446`.
[INFO] [stderr] error: could not compile `slog`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "422965b2f7da7e3489b31818d7960c27a462ba745e3b6ccc02d08d2cc252de7c"`
[INFO] running `"docker" "rm" "-f" "422965b2f7da7e3489b31818d7960c27a462ba745e3b6ccc02d08d2cc252de7c"`
[INFO] [stdout] 422965b2f7da7e3489b31818d7960c27a462ba745e3b6ccc02d08d2cc252de7c