[INFO] updating cached repository ice1000/test_proto_bench
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ice1000/test_proto_bench
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ice1000/test_proto_bench" "work/ex/beta-1.37-6/sources/1.36.0/gh/ice1000/test_proto_bench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ice1000/test_proto_bench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ice1000/test_proto_bench" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ice1000/test_proto_bench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ice1000/test_proto_bench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 058d7e383b52a0a5707836d2aa02192b6c4c20ea
[INFO] sha for GitHub repo ice1000/test_proto_bench: 058d7e383b52a0a5707836d2aa02192b6c4c20ea
[INFO] validating manifest of ice1000/test_proto_bench 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 ice1000/test_proto_bench 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 ice1000/test_proto_bench
[INFO] finished frobbing ice1000/test_proto_bench
[INFO] frobbed toml for ice1000/test_proto_bench written to work/ex/beta-1.37-6/sources/1.36.0/gh/ice1000/test_proto_bench/Cargo.toml
[INFO] started frobbing ice1000/test_proto_bench
[INFO] finished frobbing ice1000/test_proto_bench
[INFO] frobbed toml for ice1000/test_proto_bench written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ice1000/test_proto_bench/Cargo.toml
[INFO] crate ice1000/test_proto_bench already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ice1000/test_proto_bench 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/gh/ice1000/test_proto_bench:/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] 0f22f103f5353d00c3932a3e8872ff169b08ec87b9a9a8c625c9e648385691e3
[INFO] running `"docker" "start" "-a" "0f22f103f5353d00c3932a3e8872ff169b08ec87b9a9a8c625c9e648385691e3"`
[INFO] [stderr]    Compiling cc v1.0.27
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.11
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling protobuf v2.2.0
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling bytes v0.4.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.26
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling prost v0.4.0
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling failure v0.1.3
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling prost-derive v0.4.0
[INFO] [stderr]    Compiling quick-protobuf v0.6.3
[INFO] [stderr]    Compiling prost-build v0.4.0
[INFO] [stderr]    Compiling protobuf-codegen v2.2.0
[INFO] [stderr]    Compiling prost-types v0.4.0
[INFO] [stderr]    Compiling protobuf-codegen-pure v2.2.0
[INFO] [stderr]    Compiling test_proto_bench v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `test_proto_bench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0f22f103f5353d00c3932a3e8872ff169b08ec87b9a9a8c625c9e648385691e3"`
[INFO] running `"docker" "rm" "-f" "0f22f103f5353d00c3932a3e8872ff169b08ec87b9a9a8c625c9e648385691e3"`
[INFO] [stdout] 0f22f103f5353d00c3932a3e8872ff169b08ec87b9a9a8c625c9e648385691e3