[INFO] cloning repository nikomatsakis/skill-tree
[INFO] running `"git" "clone" "--bare" "git://github.com/nikomatsakis/skill-tree.git" "work/cache/sources/gh/nikomatsakis/skill-tree"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/nikomatsakis/skill-tree'...
[INFO] running `"git" "clone" "work/cache/sources/gh/nikomatsakis/skill-tree" "work/ex/beta-1.37-6/sources/1.36.0/gh/nikomatsakis/skill-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/nikomatsakis/skill-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nikomatsakis/skill-tree" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1f7a133d3840209c4fca104869aa8557dad30b45
[INFO] sha for GitHub repo nikomatsakis/skill-tree: 1f7a133d3840209c4fca104869aa8557dad30b45
[INFO] validating manifest of nikomatsakis/skill-tree 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 nikomatsakis/skill-tree 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 nikomatsakis/skill-tree
[INFO] finished frobbing nikomatsakis/skill-tree
[INFO] frobbed toml for nikomatsakis/skill-tree written to work/ex/beta-1.37-6/sources/1.36.0/gh/nikomatsakis/skill-tree/Cargo.toml
[INFO] started frobbing nikomatsakis/skill-tree
[INFO] finished frobbing nikomatsakis/skill-tree
[INFO] frobbed toml for nikomatsakis/skill-tree written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree/Cargo.toml
[INFO] crate nikomatsakis/skill-tree already has a lockfile, it will not be regenerated
[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 nikomatsakis/skill-tree against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 8106153fbace04dfd7694cd3784e9708d7db709fcf95daa161f3061ab9fe8562
[INFO] running `"docker" "start" "-a" "8106153fbace04dfd7694cd3784e9708d7db709fcf95daa161f3061ab9fe8562"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling paw-raw v1.0.0
[INFO] [stderr]    Compiling svg v0.5.12
[INFO] [stderr]    Compiling toml v0.5.1
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling paw-attributes v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling paw v1.0.0
[INFO] [stderr]    Compiling treeviz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Fallible<T> = Result<T, Box<std::error::Error>>;
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.64s
[INFO] running `"docker" "inspect" "8106153fbace04dfd7694cd3784e9708d7db709fcf95daa161f3061ab9fe8562"`
[INFO] running `"docker" "rm" "-f" "8106153fbace04dfd7694cd3784e9708d7db709fcf95daa161f3061ab9fe8562"`
[INFO] [stdout] 8106153fbace04dfd7694cd3784e9708d7db709fcf95daa161f3061ab9fe8562
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3cb9610937add00b96364ee51cdd78346ff44d14dbb07c94d8df02cad600c014
[INFO] running `"docker" "start" "-a" "3cb9610937add00b96364ee51cdd78346ff44d14dbb07c94d8df02cad600c014"`
[INFO] [stderr]    Compiling treeviz v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Fallible<T> = Result<T, Box<std::error::Error>>;
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `"docker" "inspect" "3cb9610937add00b96364ee51cdd78346ff44d14dbb07c94d8df02cad600c014"`
[INFO] running `"docker" "rm" "-f" "3cb9610937add00b96364ee51cdd78346ff44d14dbb07c94d8df02cad600c014"`
[INFO] [stdout] 3cb9610937add00b96364ee51cdd78346ff44d14dbb07c94d8df02cad600c014
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/nikomatsakis/skill-tree:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 8d271544424eff5aae36186d469fefd93ba30e0bc3f03a87344f5d11b5f9d5c6
[INFO] running `"docker" "start" "-a" "8d271544424eff5aae36186d469fefd93ba30e0bc3f03a87344f5d11b5f9d5c6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/treeviz-23085fa5bce5785e
[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] running `"docker" "inspect" "8d271544424eff5aae36186d469fefd93ba30e0bc3f03a87344f5d11b5f9d5c6"`
[INFO] running `"docker" "rm" "-f" "8d271544424eff5aae36186d469fefd93ba30e0bc3f03a87344f5d11b5f9d5c6"`
[INFO] [stdout] 8d271544424eff5aae36186d469fefd93ba30e0bc3f03a87344f5d11b5f9d5c6