[INFO] crate dynamic-arena 0.1.2 is already in cache
[INFO] extracting crate dynamic-arena 0.1.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/dynamic-arena/0.1.2
[INFO] extracting crate dynamic-arena 0.1.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dynamic-arena/0.1.2
[INFO] validating manifest of dynamic-arena-0.1.2 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 dynamic-arena-0.1.2 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 dynamic-arena-0.1.2
[INFO] finished frobbing dynamic-arena-0.1.2
[INFO] frobbed toml for dynamic-arena-0.1.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/dynamic-arena/0.1.2/Cargo.toml
[INFO] started frobbing dynamic-arena-0.1.2
[INFO] finished frobbing dynamic-arena-0.1.2
[INFO] frobbed toml for dynamic-arena-0.1.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dynamic-arena/0.1.2/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 dynamic-arena-0.1.2 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/dynamic-arena/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 1e04d761cc49075cc4d77b06ef32820e0e6a6458eb27338b7c558c01feeb5ec6
[INFO] running `"docker" "start" "-a" "1e04d761cc49075cc4d77b06ef32820e0e6a6458eb27338b7c558c01feeb5ec6"`
[INFO] [stderr]    Compiling dynamic-arena v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `"docker" "inspect" "1e04d761cc49075cc4d77b06ef32820e0e6a6458eb27338b7c558c01feeb5ec6"`
[INFO] running `"docker" "rm" "-f" "1e04d761cc49075cc4d77b06ef32820e0e6a6458eb27338b7c558c01feeb5ec6"`
[INFO] [stdout] 1e04d761cc49075cc4d77b06ef32820e0e6a6458eb27338b7c558c01feeb5ec6
[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/dynamic-arena/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 02c83c3174821acb5b84d9af09ce9ff88a8234dcb65443dc98ce03a4deec8718
[INFO] running `"docker" "start" "-a" "02c83c3174821acb5b84d9af09ce9ff88a8234dcb65443dc98ce03a4deec8718"`
[INFO] [stderr]    Compiling compiletest_rs v0.3.22
[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/compiletest_rs-0.3.22/src/lib.rs:13:39
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![cfg_attr(not(feature = "norustc"), feature(rustc_private))]
[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/compiletest_rs-0.3.22/src/lib.rs:14:38
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![cfg_attr(not(feature = "stable"), feature(test))]
[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 `compiletest_rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "02c83c3174821acb5b84d9af09ce9ff88a8234dcb65443dc98ce03a4deec8718"`
[INFO] running `"docker" "rm" "-f" "02c83c3174821acb5b84d9af09ce9ff88a8234dcb65443dc98ce03a4deec8718"`
[INFO] [stdout] 02c83c3174821acb5b84d9af09ce9ff88a8234dcb65443dc98ce03a4deec8718