[INFO] updating cached repository amitayadav/mocking_demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/amitayadav/mocking_demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/amitayadav/mocking_demo" "work/ex/beta-1.38-1/sources/1.37.0/gh/amitayadav/mocking_demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/amitayadav/mocking_demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/amitayadav/mocking_demo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitayadav/mocking_demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitayadav/mocking_demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5a3cfc30514d0ec3b08320b0739e8db707b880ea
[INFO] sha for GitHub repo amitayadav/mocking_demo: 5a3cfc30514d0ec3b08320b0739e8db707b880ea
[INFO] validating manifest of amitayadav/mocking_demo 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 amitayadav/mocking_demo 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 amitayadav/mocking_demo
[INFO] finished frobbing amitayadav/mocking_demo
[INFO] frobbed toml for amitayadav/mocking_demo written to work/ex/beta-1.38-1/sources/1.37.0/gh/amitayadav/mocking_demo/Cargo.toml
[INFO] started frobbing amitayadav/mocking_demo
[INFO] finished frobbing amitayadav/mocking_demo
[INFO] frobbed toml for amitayadav/mocking_demo written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitayadav/mocking_demo/Cargo.toml
[INFO] crate amitayadav/mocking_demo already has a lockfile, it will not be regenerated
[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 amitayadav/mocking_demo against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/amitayadav/mocking_demo:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] cd9a213feac15e61c939647aa00161eb9d731ba3f469ea102ca6275b100e957d
[INFO] running `"docker" "start" "-a" "cd9a213feac15e61c939647aa00161eb9d731ba3f469ea102ca6275b100e957d"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling mocktopus_macros v0.5.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/mocktopus_macros-0.5.0/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" "cd9a213feac15e61c939647aa00161eb9d731ba3f469ea102ca6275b100e957d"`
[INFO] running `"docker" "rm" "-f" "cd9a213feac15e61c939647aa00161eb9d731ba3f469ea102ca6275b100e957d"`
[INFO] [stdout] cd9a213feac15e61c939647aa00161eb9d731ba3f469ea102ca6275b100e957d