[INFO] updating cached repository dfhoughton/two-timer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dfhoughton/two-timer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dfhoughton/two-timer" "work/ex/beta-1.38-1/sources/1.37.0/gh/dfhoughton/two-timer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dfhoughton/two-timer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dfhoughton/two-timer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dfhoughton/two-timer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dfhoughton/two-timer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e3df19074be7c5f4a175b415291434048eb811e1
[INFO] sha for GitHub repo dfhoughton/two-timer: e3df19074be7c5f4a175b415291434048eb811e1
[INFO] validating manifest of dfhoughton/two-timer 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 dfhoughton/two-timer 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 dfhoughton/two-timer
[INFO] finished frobbing dfhoughton/two-timer
[INFO] frobbed toml for dfhoughton/two-timer written to work/ex/beta-1.38-1/sources/1.37.0/gh/dfhoughton/two-timer/Cargo.toml
[INFO] started frobbing dfhoughton/two-timer
[INFO] finished frobbing dfhoughton/two-timer
[INFO] frobbed toml for dfhoughton/two-timer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dfhoughton/two-timer/Cargo.toml
[INFO] crate dfhoughton/two-timer 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 dfhoughton/two-timer against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dfhoughton/two-timer:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 42fa94fdb577d1fb6f9b743c348d210b91fffdec3648aeebb9f3d1b3696149ad
[INFO] running `"docker" "start" "-a" "42fa94fdb577d1fb6f9b743c348d210b91fffdec3648aeebb9f3d1b3696149ad"`
[INFO] [stderr]    Compiling regex-syntax v0.6.3
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling pidgin v0.3.0
[INFO] [stderr]    Compiling two_timer v1.0.8 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.93s
[INFO] running `"docker" "inspect" "42fa94fdb577d1fb6f9b743c348d210b91fffdec3648aeebb9f3d1b3696149ad"`
[INFO] running `"docker" "rm" "-f" "42fa94fdb577d1fb6f9b743c348d210b91fffdec3648aeebb9f3d1b3696149ad"`
[INFO] [stdout] 42fa94fdb577d1fb6f9b743c348d210b91fffdec3648aeebb9f3d1b3696149ad
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dfhoughton/two-timer:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9f93c8696ccd07e2ac2f8b0066250ae47ff3223089f70489791718b3487056c2
[INFO] running `"docker" "start" "-a" "9f93c8696ccd07e2ac2f8b0066250ae47ff3223089f70489791718b3487056c2"`
[INFO] [stderr]    Compiling two_timer v1.0.8 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> tests/tests.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[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 `two_timer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9f93c8696ccd07e2ac2f8b0066250ae47ff3223089f70489791718b3487056c2"`
[INFO] running `"docker" "rm" "-f" "9f93c8696ccd07e2ac2f8b0066250ae47ff3223089f70489791718b3487056c2"`
[INFO] [stdout] 9f93c8696ccd07e2ac2f8b0066250ae47ff3223089f70489791718b3487056c2