[INFO] crate rdma-core 0.0.1 is already in cache
[INFO] extracting crate rdma-core 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/rdma-core/0.0.1
[INFO] extracting crate rdma-core 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rdma-core/0.0.1
[INFO] validating manifest of rdma-core-0.0.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rdma-core-0.0.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rdma-core-0.0.1
[INFO] removed path dependency rdma-core-sys from rdma-core-0.0.1
[INFO] finished frobbing rdma-core-0.0.1
[INFO] frobbed toml for rdma-core-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rdma-core/0.0.1/Cargo.toml
[INFO] started frobbing rdma-core-0.0.1
[INFO] removed path dependency rdma-core-sys from rdma-core-0.0.1
[INFO] finished frobbing rdma-core-0.0.1
[INFO] frobbed toml for rdma-core-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rdma-core/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rdma-core-0.0.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rdma-core/0.0.1:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 780b9d4928ee66e7cb72e9480d7c3521be168a056e8fb56cf23c80dc6d9b8403
[INFO] running `"docker" "start" "-a" "780b9d4928ee66e7cb72e9480d7c3521be168a056e8fb56cf23c80dc6d9b8403"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling odds v0.2.26
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling syscall-alt v0.0.14
[INFO] [stderr]    Compiling rdma-core-sys v0.0.1
[INFO] [stderr]    Compiling errno v0.2.4
[INFO] [stderr]    Compiling rust-extra v0.0.13
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-extra-0.0.13/src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(core_intrinsics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust-extra-0.0.13/src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(associated_consts)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/syscall-alt-0.0.14/src/lib.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #![feature(asm)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/syscall-alt-0.0.14/src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(associated_consts)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/syscall-alt-0.0.14/src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rust-extra`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `syscall-alt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "780b9d4928ee66e7cb72e9480d7c3521be168a056e8fb56cf23c80dc6d9b8403"`
[INFO] running `"docker" "rm" "-f" "780b9d4928ee66e7cb72e9480d7c3521be168a056e8fb56cf23c80dc6d9b8403"`
[INFO] [stdout] 780b9d4928ee66e7cb72e9480d7c3521be168a056e8fb56cf23c80dc6d9b8403