[INFO] crate err-ctx 0.2.3 is already in cache
[INFO] extracting crate err-ctx 0.2.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3
[INFO] extracting crate err-ctx 0.2.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/err-ctx/0.2.3
[INFO] validating manifest of err-ctx-0.2.3 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 err-ctx-0.2.3 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 err-ctx-0.2.3
[INFO] finished frobbing err-ctx-0.2.3
[INFO] frobbed toml for err-ctx-0.2.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3/Cargo.toml
[INFO] started frobbing err-ctx-0.2.3
[INFO] finished frobbing err-ctx-0.2.3
[INFO] frobbed toml for err-ctx-0.2.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/err-ctx/0.2.3/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 err-ctx-0.2.3 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-7/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/err-ctx/0.2.3:/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] b7c77885d46dea71e504d224657deb241860f0f8d0400b4483ff5f873cfa1c47
[INFO] running `"docker" "start" "-a" "b7c77885d46dea71e504d224657deb241860f0f8d0400b4483ff5f873cfa1c47"`
[INFO] [stderr]    Compiling err-ctx v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:76:18
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<T: Into<Box<Error + Send + Sync>>> ErrorExt for T {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `"docker" "inspect" "b7c77885d46dea71e504d224657deb241860f0f8d0400b4483ff5f873cfa1c47"`
[INFO] running `"docker" "rm" "-f" "b7c77885d46dea71e504d224657deb241860f0f8d0400b4483ff5f873cfa1c47"`
[INFO] [stdout] b7c77885d46dea71e504d224657deb241860f0f8d0400b4483ff5f873cfa1c47
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/err-ctx/0.2.3:/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] eb82cd61db6e82bc57f587f01ab5609dd5d3a5ec1521c981da324bbcb1ea54d1
[INFO] running `"docker" "start" "-a" "eb82cd61db6e82bc57f587f01ab5609dd5d3a5ec1521c981da324bbcb1ea54d1"`
[INFO] [stderr]    Compiling err-ctx v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:76:18
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<T: Into<Box<Error + Send + Sync>>> ErrorExt for T {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `"docker" "inspect" "eb82cd61db6e82bc57f587f01ab5609dd5d3a5ec1521c981da324bbcb1ea54d1"`
[INFO] running `"docker" "rm" "-f" "eb82cd61db6e82bc57f587f01ab5609dd5d3a5ec1521c981da324bbcb1ea54d1"`
[INFO] [stdout] eb82cd61db6e82bc57f587f01ab5609dd5d3a5ec1521c981da324bbcb1ea54d1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/err-ctx/0.2.3:/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"`
[INFO] [stdout] 14c8ed4eaf6e6c1c34caacc39f57e17dd63c4b3914d6424aae53323b70fa184d
[INFO] running `"docker" "start" "-a" "14c8ed4eaf6e6c1c34caacc39f57e17dd63c4b3914d6424aae53323b70fa184d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/err_ctx-bbadce7824ab0204
[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 err-ctx
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 7) ... 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" "14c8ed4eaf6e6c1c34caacc39f57e17dd63c4b3914d6424aae53323b70fa184d"`
[INFO] running `"docker" "rm" "-f" "14c8ed4eaf6e6c1c34caacc39f57e17dd63c4b3914d6424aae53323b70fa184d"`
[INFO] [stdout] 14c8ed4eaf6e6c1c34caacc39f57e17dd63c4b3914d6424aae53323b70fa184d