[INFO] crate a2 0.4.0 is already in cache
[INFO] extracting crate a2 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/a2/0.4.0
[INFO] extracting crate a2 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/a2/0.4.0
[INFO] validating manifest of a2-0.4.0 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 a2-0.4.0 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 a2-0.4.0
[INFO] finished frobbing a2-0.4.0
[INFO] frobbed toml for a2-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/a2/0.4.0/Cargo.toml
[INFO] started frobbing a2-0.4.0
[INFO] finished frobbing a2-0.4.0
[INFO] frobbed toml for a2-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/a2/0.4.0/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 a2-0.4.0 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/a2/0.4.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1546d2aaaa3b6a0fcc77c85121a955560e2abc4abcb8b87637774e49bcc3fa3d
[INFO] running `"docker" "start" "-a" "1546d2aaaa3b6a0fcc77c85121a955560e2abc4abcb8b87637774e49bcc3fa3d"`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling erased-serde v0.3.9
[INFO] [stderr]    Compiling error-chain v0.1.12
[INFO] [stderr]    Compiling pretty_env_logger v0.2.5
[INFO] [stderr]    Compiling trust-dns-proto v0.4.3
[INFO] [stderr]    Compiling trust-dns-resolver v0.9.1
[INFO] [stderr]    Compiling indoc-impl v0.2.8
[INFO] [stderr]    Compiling webpki v0.18.1
[INFO] [stderr]    Compiling sct v0.3.0
[INFO] [stderr]    Compiling indoc v0.2.8
[INFO] [stderr]    Compiling rustls v0.12.0
[INFO] [stderr]    Compiling webpki-roots v0.14.0
[INFO] [stderr]    Compiling tokio-rustls v0.5.0
[INFO] [stderr]    Compiling hyper-alpn v0.1.4
[INFO] [stderr]    Compiling a2 v0.4.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.01s
[INFO] running `"docker" "inspect" "1546d2aaaa3b6a0fcc77c85121a955560e2abc4abcb8b87637774e49bcc3fa3d"`
[INFO] running `"docker" "rm" "-f" "1546d2aaaa3b6a0fcc77c85121a955560e2abc4abcb8b87637774e49bcc3fa3d"`
[INFO] [stdout] 1546d2aaaa3b6a0fcc77c85121a955560e2abc4abcb8b87637774e49bcc3fa3d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/a2/0.4.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e0524a68c7789488867db8febbb7a4f68575a813edf254bcd55c58e62289d755
[INFO] running `"docker" "start" "-a" "e0524a68c7789488867db8febbb7a4f68575a813edf254bcd55c58e62289d755"`
[INFO] [stderr]    Compiling argparse v0.2.2
[INFO] [stderr]    Compiling a2 v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]   --> examples/token_client.rs:70:16
[INFO] [stderr]    |
[INFO] [stderr] 70 |         key_id.as_ref(),
[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 E0283`.
[INFO] [stderr] error: Could not compile `a2`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e0524a68c7789488867db8febbb7a4f68575a813edf254bcd55c58e62289d755"`
[INFO] running `"docker" "rm" "-f" "e0524a68c7789488867db8febbb7a4f68575a813edf254bcd55c58e62289d755"`
[INFO] [stdout] e0524a68c7789488867db8febbb7a4f68575a813edf254bcd55c58e62289d755