[INFO] updating cached repository autozimu/rust-mock-sample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/autozimu/rust-mock-sample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/autozimu/rust-mock-sample" "work/ex/beta-1.37-6/sources/1.36.0/gh/autozimu/rust-mock-sample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/autozimu/rust-mock-sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/autozimu/rust-mock-sample" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/autozimu/rust-mock-sample"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/autozimu/rust-mock-sample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a4a068b092bdaf3978aecbfcd7646c21b391ec50
[INFO] sha for GitHub repo autozimu/rust-mock-sample: a4a068b092bdaf3978aecbfcd7646c21b391ec50
[INFO] validating manifest of autozimu/rust-mock-sample 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 autozimu/rust-mock-sample 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 autozimu/rust-mock-sample
[INFO] finished frobbing autozimu/rust-mock-sample
[INFO] frobbed toml for autozimu/rust-mock-sample written to work/ex/beta-1.37-6/sources/1.36.0/gh/autozimu/rust-mock-sample/Cargo.toml
[INFO] started frobbing autozimu/rust-mock-sample
[INFO] finished frobbing autozimu/rust-mock-sample
[INFO] frobbed toml for autozimu/rust-mock-sample written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/autozimu/rust-mock-sample/Cargo.toml
[INFO] crate autozimu/rust-mock-sample 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing autozimu/rust-mock-sample 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/autozimu/rust-mock-sample:/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] b0cea16fd4ca90470ec5f0b8c1f7131566b40e0e647d0994d4f67d5c16a841d9
[INFO] running `"docker" "start" "-a" "b0cea16fd4ca90470ec5f0b8c1f7131566b40e0e647d0994d4f67d5c16a841d9"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling sample v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `hello_world`
[INFO] [stderr]   --> src/main.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn hello_world(w: impl Watch) -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "b0cea16fd4ca90470ec5f0b8c1f7131566b40e0e647d0994d4f67d5c16a841d9"`
[INFO] running `"docker" "rm" "-f" "b0cea16fd4ca90470ec5f0b8c1f7131566b40e0e647d0994d4f67d5c16a841d9"`
[INFO] [stdout] b0cea16fd4ca90470ec5f0b8c1f7131566b40e0e647d0994d4f67d5c16a841d9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/autozimu/rust-mock-sample:/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] 15af0ea920d8ceb343d7996148492140da0e5e05a61cccb511322b6091eec123
[INFO] running `"docker" "start" "-a" "15af0ea920d8ceb343d7996148492140da0e5e05a61cccb511322b6091eec123"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.28
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling mocktopus_macros v0.7.0
[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/mocktopus_macros-0.7.0/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(proc_macro_diagnostic)]
[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 `mocktopus_macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "15af0ea920d8ceb343d7996148492140da0e5e05a61cccb511322b6091eec123"`
[INFO] running `"docker" "rm" "-f" "15af0ea920d8ceb343d7996148492140da0e5e05a61cccb511322b6091eec123"`
[INFO] [stdout] 15af0ea920d8ceb343d7996148492140da0e5e05a61cccb511322b6091eec123