[INFO] crate slog-async 2.3.0 is already in cache
[INFO] extracting crate slog-async 2.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/slog-async/2.3.0
[INFO] extracting crate slog-async 2.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/slog-async/2.3.0
[INFO] validating manifest of slog-async-2.3.0 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 slog-async-2.3.0 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 slog-async-2.3.0
[INFO] finished frobbing slog-async-2.3.0
[INFO] frobbed toml for slog-async-2.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/slog-async/2.3.0/Cargo.toml
[INFO] started frobbing slog-async-2.3.0
[INFO] finished frobbing slog-async-2.3.0
[INFO] frobbed toml for slog-async-2.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/slog-async/2.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 slog-async-2.3.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/slog-async/2.3.0:/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] 66a0887d161e8f374c70151bb95730066459dd646680f83a6a1ce433f75416f8
[INFO] running `"docker" "start" "-a" "66a0887d161e8f374c70151bb95730066459dd646680f83a6a1ce433f75416f8"`
[INFO] [stderr]    Compiling slog-async v2.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> lib.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |     kv: Box<KV + Send>,
[INFO] [stderr]    |             ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> lib.rs:81:28
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn finish(self) -> Box<KV + Send> {
[INFO] [stderr]    |                            ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:184:15
[INFO] [stderr]     |
[INFO] [stderr] 184 |     Fatal(Box<std::error::Error>),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:371:34
[INFO] [stderr]     |
[INFO] [stderr] 371 |         let _err: Result<(), Box<std::error::Error>> = {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:479:13
[INFO] [stderr]     |
[INFO] [stderr] 479 |     kv: Box<KV + Send>,
[INFO] [stderr]     |             ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:489:34
[INFO] [stderr]     |
[INFO] [stderr] 489 |         let _err: Result<(), Box<std::error::Error>> = {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "66a0887d161e8f374c70151bb95730066459dd646680f83a6a1ce433f75416f8"`
[INFO] running `"docker" "rm" "-f" "66a0887d161e8f374c70151bb95730066459dd646680f83a6a1ce433f75416f8"`
[INFO] [stdout] 66a0887d161e8f374c70151bb95730066459dd646680f83a6a1ce433f75416f8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/slog-async/2.3.0:/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] 8d14a0d2dc6b16ea99f11c422db88fcfc84484da7458eea5879aed38a3f4f7ed
[INFO] running `"docker" "start" "-a" "8d14a0d2dc6b16ea99f11c422db88fcfc84484da7458eea5879aed38a3f4f7ed"`
[INFO] [stderr]    Compiling slog-async v2.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> lib.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |     kv: Box<KV + Send>,
[INFO] [stderr]    |             ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> lib.rs:81:28
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn finish(self) -> Box<KV + Send> {
[INFO] [stderr]    |                            ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:184:15
[INFO] [stderr]     |
[INFO] [stderr] 184 |     Fatal(Box<std::error::Error>),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:371:34
[INFO] [stderr]     |
[INFO] [stderr] 371 |         let _err: Result<(), Box<std::error::Error>> = {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:479:13
[INFO] [stderr]     |
[INFO] [stderr] 479 |     kv: Box<KV + Send>,
[INFO] [stderr]     |             ^^^^^^^^^ help: use `dyn`: `dyn KV + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> lib.rs:489:34
[INFO] [stderr]     |
[INFO] [stderr] 489 |         let _err: Result<(), Box<std::error::Error>> = {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "8d14a0d2dc6b16ea99f11c422db88fcfc84484da7458eea5879aed38a3f4f7ed"`
[INFO] running `"docker" "rm" "-f" "8d14a0d2dc6b16ea99f11c422db88fcfc84484da7458eea5879aed38a3f4f7ed"`
[INFO] [stdout] 8d14a0d2dc6b16ea99f11c422db88fcfc84484da7458eea5879aed38a3f4f7ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/slog-async/2.3.0:/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"`
[INFO] [stdout] 94f8954e601c87beba85281043b78124906c20280fa20399b07e7c32073c12bb
[INFO] running `"docker" "start" "-a" "94f8954e601c87beba85281043b78124906c20280fa20399b07e7c32073c12bb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/slog_async-7f0cf33fa632c0fa
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests slog-async
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test lib.rs -  (line 30) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "94f8954e601c87beba85281043b78124906c20280fa20399b07e7c32073c12bb"`
[INFO] running `"docker" "rm" "-f" "94f8954e601c87beba85281043b78124906c20280fa20399b07e7c32073c12bb"`
[INFO] [stdout] 94f8954e601c87beba85281043b78124906c20280fa20399b07e7c32073c12bb