[INFO] crate pg_async 0.8.6 is already in cache
[INFO] extracting crate pg_async 0.8.6 into work/ex/beta-1.37-6/sources/1.36.0/reg/pg_async/0.8.6
[INFO] extracting crate pg_async 0.8.6 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pg_async/0.8.6
[INFO] validating manifest of pg_async-0.8.6 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 pg_async-0.8.6 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 pg_async-0.8.6
[INFO] removed 0 missing examples
[INFO] finished frobbing pg_async-0.8.6
[INFO] frobbed toml for pg_async-0.8.6 written to work/ex/beta-1.37-6/sources/1.36.0/reg/pg_async/0.8.6/Cargo.toml
[INFO] started frobbing pg_async-0.8.6
[INFO] removed 0 missing examples
[INFO] finished frobbing pg_async-0.8.6
[INFO] frobbed toml for pg_async-0.8.6 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/pg_async/0.8.6/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 pg_async-0.8.6 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pg_async/0.8.6:/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] 3e9c7fd6900192d74b478bb23b6c8fedefe01f6a3d341a8c8d4181c93bc89361
[INFO] running `"docker" "start" "-a" "3e9c7fd6900192d74b478bb23b6c8fedefe01f6a3d341a8c8d4181c93bc89361"`
[INFO] [stderr]    Compiling pg_async v0.8.6 (/opt/crater/workdir)
[INFO] [stderr]    Compiling inlinable_string v0.1.10
[INFO] [stderr]    Compiling atomic v0.4.5
[INFO] [stderr]    Compiling gstuff v0.5.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.17s
[INFO] running `"docker" "inspect" "3e9c7fd6900192d74b478bb23b6c8fedefe01f6a3d341a8c8d4181c93bc89361"`
[INFO] running `"docker" "rm" "-f" "3e9c7fd6900192d74b478bb23b6c8fedefe01f6a3d341a8c8d4181c93bc89361"`
[INFO] [stdout] 3e9c7fd6900192d74b478bb23b6c8fedefe01f6a3d341a8c8d4181c93bc89361
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/pg_async/0.8.6:/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] 406f4fdb2d2f8794350ccf6e7c6d32cc031c0d082307b8fef16c401aaed37761
[INFO] running `"docker" "start" "-a" "406f4fdb2d2f8794350ccf6e7c6d32cc031c0d082307b8fef16c401aaed37761"`
[INFO] [stderr]    Compiling fomat-macros v0.2.1
[INFO] [stderr]    Compiling pg_async v0.8.6 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> examples/24x7.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(type_ascription, integer_atomics)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: type ascription is experimental
[INFO] [stderr]   --> src/tests.rs:9:35
[INFO] [stderr]    |
[INFO] [stderr] 9  |     static ref DSNS: Vec<String> = (io::BufReader::new (fs::File::open ("../pg_async.dsns") .expect ("!pg_async.dsns"))
[INFO] [stderr]    |  ___________________________________^
[INFO] [stderr] 10 | |     .lines().collect() :Result<Vec<String>, _>) .expect ("!pg_async.dsns");}
[INFO] [stderr]    | |______________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/23416
[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 `pg_async`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `pg_async`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "406f4fdb2d2f8794350ccf6e7c6d32cc031c0d082307b8fef16c401aaed37761"`
[INFO] running `"docker" "rm" "-f" "406f4fdb2d2f8794350ccf6e7c6d32cc031c0d082307b8fef16c401aaed37761"`
[INFO] [stdout] 406f4fdb2d2f8794350ccf6e7c6d32cc031c0d082307b8fef16c401aaed37761