[INFO] crate coresimd 0.1.2 is already in cache
[INFO] extracting crate coresimd 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/coresimd/0.1.2
[INFO] extracting crate coresimd 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/coresimd/0.1.2
[INFO] validating manifest of coresimd-0.1.2 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of coresimd-0.1.2 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing coresimd-0.1.2
[INFO] finished frobbing coresimd-0.1.2
[INFO] frobbed toml for coresimd-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/coresimd/0.1.2/Cargo.toml
[INFO] started frobbing coresimd-0.1.2
[INFO] finished frobbing coresimd-0.1.2
[INFO] frobbed toml for coresimd-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/coresimd/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing coresimd-0.1.2 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/coresimd/0.1.2:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 2c0e275737408d24837d26241ec37f844c0b1043956e55aab32a8ac0e7cdfdb4
[INFO] running `"docker" "start" "-a" "2c0e275737408d24837d26241ec37f844c0b1043956e55aab32a8ac0e7cdfdb4"`
[INFO] [stderr]    Compiling coresimd v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / #![feature(
[INFO] [stderr] 13 | |     const_fn,
[INFO] [stderr] 14 | |     const_fn_union,
[INFO] [stderr] 15 | |     link_llvm_intrinsics,
[INFO] [stderr] ...  |
[INFO] [stderr] 36 | |     powerpc_target_feature,
[INFO] [stderr] 37 | | )]
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdrand16_step`
[INFO] [stderr]  --> src/coresimd/x86/rdrand.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn x86_rdrand16_step() -> (u16, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdrand32_step`
[INFO] [stderr]  --> src/coresimd/x86/rdrand.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn x86_rdrand32_step() -> (u32, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdseed16_step`
[INFO] [stderr]  --> src/coresimd/x86/rdrand.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn x86_rdseed16_step() -> (u16, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdseed32_step`
[INFO] [stderr]  --> src/coresimd/x86/rdrand.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn x86_rdseed32_step() -> (u32, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdrand64_step`
[INFO] [stderr]  --> src/coresimd/x86_64/rdrand.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn x86_rdrand64_step() -> (u64, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: unrecognized platform-specific intrinsic function: `x86_rdseed64_step`
[INFO] [stderr]  --> src/coresimd/x86_64/rdrand.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn x86_rdseed64_step() -> (u64, i32);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `coresimd`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2c0e275737408d24837d26241ec37f844c0b1043956e55aab32a8ac0e7cdfdb4"`
[INFO] running `"docker" "rm" "-f" "2c0e275737408d24837d26241ec37f844c0b1043956e55aab32a8ac0e7cdfdb4"`
[INFO] [stdout] 2c0e275737408d24837d26241ec37f844c0b1043956e55aab32a8ac0e7cdfdb4