[INFO] cloning repository JacekPrzemieniecki/earley_parser
[INFO] running `"git" "clone" "--bare" "git://github.com/JacekPrzemieniecki/earley_parser.git" "work/cache/sources/gh/JacekPrzemieniecki/earley_parser"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/JacekPrzemieniecki/earley_parser'...
[INFO] running `"git" "clone" "work/cache/sources/gh/JacekPrzemieniecki/earley_parser" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/JacekPrzemieniecki/earley_parser"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/JacekPrzemieniecki/earley_parser'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JacekPrzemieniecki/earley_parser" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/JacekPrzemieniecki/earley_parser"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/JacekPrzemieniecki/earley_parser'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 338e5c0bf2007c79f62a2f7a880f1d1448a3060d
[INFO] sha for GitHub repo JacekPrzemieniecki/earley_parser: 338e5c0bf2007c79f62a2f7a880f1d1448a3060d
[INFO] validating manifest of JacekPrzemieniecki/earley_parser on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of JacekPrzemieniecki/earley_parser on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing JacekPrzemieniecki/earley_parser
[INFO] finished frobbing JacekPrzemieniecki/earley_parser
[INFO] frobbed toml for JacekPrzemieniecki/earley_parser written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/JacekPrzemieniecki/earley_parser/Cargo.toml
[INFO] started frobbing JacekPrzemieniecki/earley_parser
[INFO] finished frobbing JacekPrzemieniecki/earley_parser
[INFO] frobbed toml for JacekPrzemieniecki/earley_parser written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/JacekPrzemieniecki/earley_parser/Cargo.toml
[INFO] crate JacekPrzemieniecki/earley_parser has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking JacekPrzemieniecki/earley_parser against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-6/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/JacekPrzemieniecki/earley_parser:/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7683d66e5fd7e9c87c095ca152c5e3ad2c7bb73611d56ccbc0f97274de20304f
[INFO] running `"docker" "start" "-a" "7683d66e5fd7e9c87c095ca152c5e3ad2c7bb73611d56ccbc0f97274de20304f"`
[INFO] [stderr]     Checking earley_parser v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `grammar::build_grammar`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use grammar::build_grammar;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `grammar::build_grammar`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use grammar::build_grammar;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/parser.rs:227:9
[INFO] [stderr]     |
[INFO] [stderr] 227 |         write!(s, "{}", indent);
[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/parser.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[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/parser.rs:230:24
[INFO] [stderr]     |
[INFO] [stderr] 230 |             false => { write!(s, "|-"); indent.to_string() + "| "}
[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/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].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/parser.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |             write!(s, "{}", node.to_string(&gram, &new_indent, i == self.children.len() -1));
[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/parser.rs:227:9
[INFO] [stderr]     |
[INFO] [stderr] 227 |         write!(s, "{}", indent);
[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/parser.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |             true => { write!(s, "\\-"); indent.to_string() + "  "},
[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/parser.rs:230:24
[INFO] [stderr]     |
[INFO] [stderr] 230 |             false => { write!(s, "|-"); indent.to_string() + "| "}
[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/parser.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         write!(s, "{}\n", &gram.symbols[self.value].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/parser.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |             write!(s, "{}", node.to_string(&gram, &new_indent, i == self.children.len() -1));
[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 0.52s
[INFO] running `"docker" "inspect" "7683d66e5fd7e9c87c095ca152c5e3ad2c7bb73611d56ccbc0f97274de20304f"`
[INFO] running `"docker" "rm" "-f" "7683d66e5fd7e9c87c095ca152c5e3ad2c7bb73611d56ccbc0f97274de20304f"`
[INFO] [stdout] 7683d66e5fd7e9c87c095ca152c5e3ad2c7bb73611d56ccbc0f97274de20304f