[INFO] crate rapid 0.0.1 is already in cache
[INFO] extracting crate rapid 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/rapid/0.0.1
[INFO] extracting crate rapid 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rapid/0.0.1
[INFO] validating manifest of rapid-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 rapid-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 rapid-0.0.1
[INFO] finished frobbing rapid-0.0.1
[INFO] frobbed toml for rapid-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rapid/0.0.1/Cargo.toml
[INFO] started frobbing rapid-0.0.1
[INFO] finished frobbing rapid-0.0.1
[INFO] frobbed toml for rapid-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rapid/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing rapid-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-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rapid/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] a8e3614458d1cc3de01f0f20ab1a98e1d5f9f649912ce46a0e93e11e8fdd1870
[INFO] running `"docker" "start" "-a" "a8e3614458d1cc3de01f0f20ab1a98e1d5f9f649912ce46a0e93e11e8fdd1870"`
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling docopt v0.8.3
[INFO] [stderr]    Compiling slog-scope v4.1.2
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling slog-term v2.4.1
[INFO] [stderr]    Compiling slog-stdlog v3.0.5
[INFO] [stderr]    Compiling rapid v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use(slog_o, slog_kv)]
[INFO] [stderr]   |                     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'failure::Error::cause': please use 'as_fail()' method instead
[INFO] [stderr]   --> src/errors/fail_methods.rs:84:14
[INFO] [stderr]    |
[INFO] [stderr] 84 |         self.cause().traverse(action)
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'failure::Error::cause': please use 'as_fail()' method instead
[INFO] [stderr]   --> src/errors/fail_methods.rs:88:14
[INFO] [stderr]    |
[INFO] [stderr] 88 |         self.cause().log_error()
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'failure::Error::cause': please use 'as_fail()' method instead
[INFO] [stderr]   --> src/errors/fail_methods.rs:92:14
[INFO] [stderr]    |
[INFO] [stderr] 92 |         self.cause().log_warning()
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'failure::Error::cause': please use 'as_fail()' method instead
[INFO] [stderr]   --> src/errors/fail_methods.rs:96:14
[INFO] [stderr]    |
[INFO] [stderr] 96 |         self.cause().stringify()
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.38s
[INFO] running `"docker" "inspect" "a8e3614458d1cc3de01f0f20ab1a98e1d5f9f649912ce46a0e93e11e8fdd1870"`
[INFO] running `"docker" "rm" "-f" "a8e3614458d1cc3de01f0f20ab1a98e1d5f9f649912ce46a0e93e11e8fdd1870"`
[INFO] [stdout] a8e3614458d1cc3de01f0f20ab1a98e1d5f9f649912ce46a0e93e11e8fdd1870
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rapid/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] a45d0aeabb0e2973216566088554b5d66a218864d92a55156eb264eb2ea49d09
[INFO] running `"docker" "start" "-a" "a45d0aeabb0e2973216566088554b5d66a218864d92a55156eb264eb2ea49d09"`
[INFO] [stderr]    Compiling test-case-derive v0.1.5
[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/test-case-derive-0.1.5/src/lib.rs:182:1
[INFO] [stderr]     |
[INFO] [stderr] 182 | #![feature(proc_macro)]
[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-case-derive`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a45d0aeabb0e2973216566088554b5d66a218864d92a55156eb264eb2ea49d09"`
[INFO] running `"docker" "rm" "-f" "a45d0aeabb0e2973216566088554b5d66a218864d92a55156eb264eb2ea49d09"`
[INFO] [stdout] a45d0aeabb0e2973216566088554b5d66a218864d92a55156eb264eb2ea49d09