[INFO] crate topgrade 2.3.1 is already in cache
[INFO] extracting crate topgrade 2.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/topgrade/2.3.1
[INFO] extracting crate topgrade 2.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/topgrade/2.3.1
[INFO] validating manifest of topgrade-2.3.1 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 topgrade-2.3.1 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 topgrade-2.3.1
[INFO] finished frobbing topgrade-2.3.1
[INFO] frobbed toml for topgrade-2.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/topgrade/2.3.1/Cargo.toml
[INFO] started frobbing topgrade-2.3.1
[INFO] finished frobbing topgrade-2.3.1
[INFO] frobbed toml for topgrade-2.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/topgrade/2.3.1/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 topgrade-2.3.1 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/topgrade/2.3.1:/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] fd1566e71d689eb30329782114a0d8f465e9a386df35850d31b339fa7cae1e05
[INFO] running `"docker" "start" "-a" "fd1566e71d689eb30329782114a0d8f465e9a386df35850d31b339fa7cae1e05"`
[INFO] [stderr]    Compiling shellexpand v1.0.0
[INFO] [stderr]    Compiling directories v2.0.2
[INFO] [stderr]    Compiling tokio-signal v0.2.7
[INFO] [stderr]    Compiling tokio-process v0.2.4
[INFO] [stderr]    Compiling topgrade v2.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:54:32
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.62s
[INFO] running `"docker" "inspect" "fd1566e71d689eb30329782114a0d8f465e9a386df35850d31b339fa7cae1e05"`
[INFO] running `"docker" "rm" "-f" "fd1566e71d689eb30329782114a0d8f465e9a386df35850d31b339fa7cae1e05"`
[INFO] [stdout] fd1566e71d689eb30329782114a0d8f465e9a386df35850d31b339fa7cae1e05
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/topgrade/2.3.1:/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] 0b088e18ca584023c0da639786e8d3664c9b16bde16cd3d67290065d46864092
[INFO] running `"docker" "start" "-a" "0b088e18ca584023c0da639786e8d3664c9b16bde16cd3d67290065d46864092"`
[INFO] [stderr]    Compiling topgrade v2.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:54:32
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn cause(&self) -> Option<&Fail> {
[INFO] [stderr]    |                                ^^^^ help: use `dyn`: `dyn Fail`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.27s
[INFO] running `"docker" "inspect" "0b088e18ca584023c0da639786e8d3664c9b16bde16cd3d67290065d46864092"`
[INFO] running `"docker" "rm" "-f" "0b088e18ca584023c0da639786e8d3664c9b16bde16cd3d67290065d46864092"`
[INFO] [stdout] 0b088e18ca584023c0da639786e8d3664c9b16bde16cd3d67290065d46864092
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/topgrade/2.3.1:/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] 7a00abb370fa8a55612d41cb664ba3af95d3133684ae65f238fca089bb543d24
[INFO] running `"docker" "start" "-a" "7a00abb370fa8a55612d41cb664ba3af95d3133684ae65f238fca089bb543d24"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/topgrade-2ae5f634081f8996
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test steps::os::linux::tests::test_antergos ... ok
[INFO] [stdout] test steps::os::linux::tests::test_arch_linux ... ok
[INFO] [stdout] test steps::os::linux::tests::test_centos ... ok
[INFO] [stdout] test steps::os::linux::tests::test_fedora ... ok
[INFO] [stdout] test steps::os::linux::tests::test_opensuse ... ok
[INFO] [stdout] test steps::os::linux::tests::test_manjaro ... ok
[INFO] [stdout] test steps::os::linux::tests::test_debian ... ok
[INFO] [stdout] test steps::os::linux::tests::test_mint ... ok
[INFO] [stdout] test steps::os::linux::tests::test_oraclelinux ... ok
[INFO] [stdout] test steps::os::linux::tests::test_ubuntu ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7a00abb370fa8a55612d41cb664ba3af95d3133684ae65f238fca089bb543d24"`
[INFO] running `"docker" "rm" "-f" "7a00abb370fa8a55612d41cb664ba3af95d3133684ae65f238fca089bb543d24"`
[INFO] [stdout] 7a00abb370fa8a55612d41cb664ba3af95d3133684ae65f238fca089bb543d24