[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 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-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 76e0f6f1fe9f16a2135cd94e7e13c28558654e8a91ed97401a6394d590ce43e3
[INFO] running `"docker" "start" "-a" "76e0f6f1fe9f16a2135cd94e7e13c28558654e8a91ed97401a6394d590ce43e3"`
[INFO] [stderr]    Compiling paw-raw v1.0.0
[INFO] [stderr]    Compiling svg v0.5.12
[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 38.67s
[INFO] running `"docker" "inspect" "76e0f6f1fe9f16a2135cd94e7e13c28558654e8a91ed97401a6394d590ce43e3"`
[INFO] running `"docker" "rm" "-f" "76e0f6f1fe9f16a2135cd94e7e13c28558654e8a91ed97401a6394d590ce43e3"`
[INFO] [stdout] 76e0f6f1fe9f16a2135cd94e7e13c28558654e8a91ed97401a6394d590ce43e3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] ca0241491ae27b3a553844cfc08359428c45060f6b5f2ce2c20a11bf07b5c0a5
[INFO] running `"docker" "start" "-a" "ca0241491ae27b3a553844cfc08359428c45060f6b5f2ce2c20a11bf07b5c0a5"`
[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 1.16s
[INFO] running `"docker" "inspect" "ca0241491ae27b3a553844cfc08359428c45060f6b5f2ce2c20a11bf07b5c0a5"`
[INFO] running `"docker" "rm" "-f" "ca0241491ae27b3a553844cfc08359428c45060f6b5f2ce2c20a11bf07b5c0a5"`
[INFO] [stdout] ca0241491ae27b3a553844cfc08359428c45060f6b5f2ce2c20a11bf07b5c0a5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 3c20d6d3b377293a1ffaf7298a6d169a2fd8e3fd9155bac32d2becc71eb84200
[INFO] running `"docker" "start" "-a" "3c20d6d3b377293a1ffaf7298a6d169a2fd8e3fd9155bac32d2becc71eb84200"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/treeviz-a8e4ab20877a006e
[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" "3c20d6d3b377293a1ffaf7298a6d169a2fd8e3fd9155bac32d2becc71eb84200"`
[INFO] running `"docker" "rm" "-f" "3c20d6d3b377293a1ffaf7298a6d169a2fd8e3fd9155bac32d2becc71eb84200"`
[INFO] [stdout] 3c20d6d3b377293a1ffaf7298a6d169a2fd8e3fd9155bac32d2becc71eb84200