[INFO] updating cached repository nikomatsakis/skill-tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nikomatsakis/skill-tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nikomatsakis/skill-tree" "work/ex/beta-1.38-1/sources/1.37.0/gh/nikomatsakis/skill-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nikomatsakis/skill-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nikomatsakis/skill-tree" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nikomatsakis/skill-tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nikomatsakis/skill-tree 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 nikomatsakis/skill-tree
[INFO] finished frobbing nikomatsakis/skill-tree
[INFO] frobbed toml for nikomatsakis/skill-tree written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nikomatsakis/skill-tree 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 946a7b72583f74b81e962c24b4eb5dee0f5e38b32485fed6935e96e501b9ab31
[INFO] running `"docker" "start" "-a" "946a7b72583f74b81e962c24b4eb5dee0f5e38b32485fed6935e96e501b9ab31"`
[INFO] [stderr]    Compiling paw-raw v1.0.0
[INFO] [stderr]    Compiling svg v0.5.12
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[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 42.17s
[INFO] running `"docker" "inspect" "946a7b72583f74b81e962c24b4eb5dee0f5e38b32485fed6935e96e501b9ab31"`
[INFO] running `"docker" "rm" "-f" "946a7b72583f74b81e962c24b4eb5dee0f5e38b32485fed6935e96e501b9ab31"`
[INFO] [stdout] 946a7b72583f74b81e962c24b4eb5dee0f5e38b32485fed6935e96e501b9ab31
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] c611a29a00bdd8cb31767d2361e2beeab8926b9952d93a65c55fcf81b6c57f17
[INFO] running `"docker" "start" "-a" "c611a29a00bdd8cb31767d2361e2beeab8926b9952d93a65c55fcf81b6c57f17"`
[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 1.05s
[INFO] running `"docker" "inspect" "c611a29a00bdd8cb31767d2361e2beeab8926b9952d93a65c55fcf81b6c57f17"`
[INFO] running `"docker" "rm" "-f" "c611a29a00bdd8cb31767d2361e2beeab8926b9952d93a65c55fcf81b6c57f17"`
[INFO] [stdout] c611a29a00bdd8cb31767d2361e2beeab8926b9952d93a65c55fcf81b6c57f17
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] dac09b2348589fa40cb2fdf267c980945dc652af216e6809bb48cfad89293478
[INFO] running `"docker" "start" "-a" "dac09b2348589fa40cb2fdf267c980945dc652af216e6809bb48cfad89293478"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/treeviz-7d1f0fcfa49928f1
[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" "dac09b2348589fa40cb2fdf267c980945dc652af216e6809bb48cfad89293478"`
[INFO] running `"docker" "rm" "-f" "dac09b2348589fa40cb2fdf267c980945dc652af216e6809bb48cfad89293478"`
[INFO] [stdout] dac09b2348589fa40cb2fdf267c980945dc652af216e6809bb48cfad89293478