[INFO] crate diesel 1.4.2 is already in cache
[INFO] extracting crate diesel 1.4.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/diesel/1.4.2
[INFO] extracting crate diesel 1.4.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/diesel/1.4.2
[INFO] validating manifest of diesel-1.4.2 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 diesel-1.4.2 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 diesel-1.4.2
[INFO] finished frobbing diesel-1.4.2
[INFO] frobbed toml for diesel-1.4.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/diesel/1.4.2/Cargo.toml
[INFO] started frobbing diesel-1.4.2
[INFO] finished frobbing diesel-1.4.2
[INFO] frobbed toml for diesel-1.4.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/diesel/1.4.2/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] testing diesel-1.4.2 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-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/diesel/1.4.2:/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] 571916f2ba2ed0b13dc1bdb535d1b77b2a39e069a0a58b51b5e87668d985929b
[INFO] running `"docker" "start" "-a" "571916f2ba2ed0b13dc1bdb535d1b77b2a39e069a0a58b51b5e87668d985929b"`
[INFO] [stderr]    Compiling diesel v1.4.2 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `And` is imported redundantly
[INFO] [stderr]    --> src/query_builder/where_clause.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 4   | use expression::operators::And;
[INFO] [stderr]     |     -------------------------- the item `And` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 162 |         use expression::operators::And;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:134:5
[INFO] [stderr]     |
[INFO] [stderr] 134 |     warnings,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr]     = note: #[warn(unused_imports)] implied by #[warn(warnings)]
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.09s
[INFO] running `"docker" "inspect" "571916f2ba2ed0b13dc1bdb535d1b77b2a39e069a0a58b51b5e87668d985929b"`
[INFO] running `"docker" "rm" "-f" "571916f2ba2ed0b13dc1bdb535d1b77b2a39e069a0a58b51b5e87668d985929b"`
[INFO] [stdout] 571916f2ba2ed0b13dc1bdb535d1b77b2a39e069a0a58b51b5e87668d985929b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/diesel/1.4.2:/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] 5aed178019dd3aebe9643cff07ec2f70242f9bcbadf6c72b4c8de464afc1c2fc
[INFO] running `"docker" "start" "-a" "5aed178019dd3aebe9643cff07ec2f70242f9bcbadf6c72b4c8de464afc1c2fc"`
[INFO] [stderr]    Compiling derive-error-chain v0.10.1
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling dotenv v0.10.1
[INFO] [stderr]    Compiling diesel v1.4.2 (/opt/crater/workdir)
[INFO] [stderr] error: At least one backend must be used to test this crate.
[INFO] [stderr]  Pass argument `--features "<backend>"` with one or more of the following backends, 'mysql', 'postgres', or 'sqlite'. 
[INFO] [stderr] 
[INFO] [stderr]  ex. cargo test --features "mysql postgres sqlite"
[INFO] [stderr] 
[INFO] [stderr]   --> src/test_helpers.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 | /         compile_error!(
[INFO] [stderr] 46 | |             "At least one backend must be used to test this crate.\n \
[INFO] [stderr] 47 | |             Pass argument `--features \"<backend>\"` with one or more of the following backends, \
[INFO] [stderr] 48 | |             'mysql', 'postgres', or 'sqlite'. \n\n \
[INFO] [stderr] 49 | |             ex. cargo test --features \"mysql postgres sqlite\"\n"
[INFO] [stderr] 50 | |         );
[INFO] [stderr]    | |__________^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `prelude::*`
[INFO] [stderr]     --> src/macros/mod.rs:1071:9
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     use prelude::*;
[INFO] [stderr]      |         ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]     --> src/lib.rs:134:5
[INFO] [stderr]      |
[INFO] [stderr] 134  |     warnings,
[INFO] [stderr]      |     ^^^^^^^^
[INFO] [stderr]      = note: #[warn(unused_imports)] implied by #[warn(warnings)]
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `prelude::*`
[INFO] [stderr]  --> src/test_helpers.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use prelude::*;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `And` is imported redundantly
[INFO] [stderr]    --> src/query_builder/where_clause.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 4   | use expression::operators::And;
[INFO] [stderr]     |     -------------------------- the item `And` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 162 |         use expression::operators::And;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `diesel`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "5aed178019dd3aebe9643cff07ec2f70242f9bcbadf6c72b4c8de464afc1c2fc"`
[INFO] running `"docker" "rm" "-f" "5aed178019dd3aebe9643cff07ec2f70242f9bcbadf6c72b4c8de464afc1c2fc"`
[INFO] [stdout] 5aed178019dd3aebe9643cff07ec2f70242f9bcbadf6c72b4c8de464afc1c2fc