[INFO] updating cached repository KoharaKazuya/forest
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/KoharaKazuya/forest
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/KoharaKazuya/forest" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KoharaKazuya/forest"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KoharaKazuya/forest'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/KoharaKazuya/forest" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KoharaKazuya/forest"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KoharaKazuya/forest'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0f2ae009c6092d49bed24efcf1a261fdd4e8a7fe
[INFO] sha for GitHub repo KoharaKazuya/forest: 0f2ae009c6092d49bed24efcf1a261fdd4e8a7fe
[INFO] validating manifest of KoharaKazuya/forest on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of KoharaKazuya/forest on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing KoharaKazuya/forest
[INFO] finished frobbing KoharaKazuya/forest
[INFO] frobbed toml for KoharaKazuya/forest written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/KoharaKazuya/forest/Cargo.toml
[INFO] started frobbing KoharaKazuya/forest
[INFO] finished frobbing KoharaKazuya/forest
[INFO] frobbed toml for KoharaKazuya/forest written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KoharaKazuya/forest/Cargo.toml
[INFO] crate KoharaKazuya/forest already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking KoharaKazuya/forest against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-0/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/KoharaKazuya/forest:/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=forbid" "-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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 724c305b25a20b7997d9a7272fa151a5cfa165d90d3f83895e3f57285f0e7ea8
[INFO] running `"docker" "start" "-a" "724c305b25a20b7997d9a7272fa151a5cfa165d90d3f83895e3f57285f0e7ea8"`
[INFO] [stderr]     Checking forest v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/tree_formatter.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 | /         write!(self.writer, "{}", match *shape {
[INFO] [stderr] 29 | |           Shape::Open => &self.ancestor_guide_open,
[INFO] [stderr] 30 | |           Shape::Close => &self.ancestor_guide_close,
[INFO] [stderr] 31 | |           _ => panic!("Unexpected Internal Value\nPerhaps, internal logic error...\nformatter can treat with only Open/Close Shape"),
[INFO] [stderr] 32 | |         });
[INFO] [stderr]    | |___________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/tree_formatter.rs:39:7
[INFO] [stderr]    |
[INFO] [stderr] 39 |       write!(self.writer, "{}{}\n", ng, entry.name);
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/tree_formatter.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 | /         write!(self.writer, "{}", match *shape {
[INFO] [stderr] 29 | |           Shape::Open => &self.ancestor_guide_open,
[INFO] [stderr] 30 | |           Shape::Close => &self.ancestor_guide_close,
[INFO] [stderr] 31 | |           _ => panic!("Unexpected Internal Value\nPerhaps, internal logic error...\nformatter can treat with only Open/Close Shape"),
[INFO] [stderr] 32 | |         });
[INFO] [stderr]    | |___________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/tree_formatter.rs:39:7
[INFO] [stderr]    |
[INFO] [stderr] 39 |       write!(self.writer, "{}{}\n", ng, entry.name);
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "724c305b25a20b7997d9a7272fa151a5cfa165d90d3f83895e3f57285f0e7ea8"`
[INFO] running `"docker" "rm" "-f" "724c305b25a20b7997d9a7272fa151a5cfa165d90d3f83895e3f57285f0e7ea8"`
[INFO] [stdout] 724c305b25a20b7997d9a7272fa151a5cfa165d90d3f83895e3f57285f0e7ea8