[INFO] cloning repository whothey/firstfollow
[INFO] running `"git" "clone" "--bare" "git://github.com/whothey/firstfollow.git" "work/cache/sources/gh/whothey/firstfollow"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/whothey/firstfollow'...
[INFO] running `"git" "clone" "work/cache/sources/gh/whothey/firstfollow" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/whothey/firstfollow"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/whothey/firstfollow'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/whothey/firstfollow" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed70ddfb2c949e42afc1b1b7e51e22ef854739a2
[INFO] sha for GitHub repo whothey/firstfollow: ed70ddfb2c949e42afc1b1b7e51e22ef854739a2
[INFO] validating manifest of whothey/firstfollow on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of whothey/firstfollow on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing whothey/firstfollow
[INFO] finished frobbing whothey/firstfollow
[INFO] frobbed toml for whothey/firstfollow written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/whothey/firstfollow/Cargo.toml
[INFO] started frobbing whothey/firstfollow
[INFO] finished frobbing whothey/firstfollow
[INFO] frobbed toml for whothey/firstfollow written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow/Cargo.toml
[INFO] crate whothey/firstfollow already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.26
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing whothey/firstfollow against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 8eb389d00ea9a4e1a875af2c4610c875bda35716a00e924daafce2075a2eed10
[INFO] running `"docker" "start" "-a" "8eb389d00ea9a4e1a875af2c4610c875bda35716a00e924daafce2075a2eed10"`
[INFO] [stderr]    Compiling libc v0.2.26
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling env_logger v0.4.3
[INFO] [stderr]    Compiling firstfollow v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formalgrammar/mod.rs:108:37
[INFO] [stderr]     |
[INFO] [stderr] 108 |                                 let mut set = first.get_mut(key).unwrap(); 
[INFO] [stderr]     |                                     ----^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formalgrammar/mod.rs:181:33
[INFO] [stderr]     |
[INFO] [stderr] 181 |                             let mut set = follow_map.entry(target)
[INFO] [stderr]     |                                 ----^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_terminal`
[INFO] [stderr]   --> src/formalgrammar/symbol.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn is_terminal(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nonterminal`
[INFO] [stderr]   --> src/formalgrammar/symbol.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.29s
[INFO] running `"docker" "inspect" "8eb389d00ea9a4e1a875af2c4610c875bda35716a00e924daafce2075a2eed10"`
[INFO] running `"docker" "rm" "-f" "8eb389d00ea9a4e1a875af2c4610c875bda35716a00e924daafce2075a2eed10"`
[INFO] [stdout] 8eb389d00ea9a4e1a875af2c4610c875bda35716a00e924daafce2075a2eed10
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 27ba8534bf80cde34dad84666f265c834a1614b16d7e6c02297b5cb2a1370693
[INFO] running `"docker" "start" "-a" "27ba8534bf80cde34dad84666f265c834a1614b16d7e6c02297b5cb2a1370693"`
[INFO] [stderr]    Compiling firstfollow v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formalgrammar/mod.rs:108:37
[INFO] [stderr]     |
[INFO] [stderr] 108 |                                 let mut set = first.get_mut(key).unwrap(); 
[INFO] [stderr]     |                                     ----^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/formalgrammar/mod.rs:181:33
[INFO] [stderr]     |
[INFO] [stderr] 181 |                             let mut set = follow_map.entry(target)
[INFO] [stderr]     |                                 ----^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_terminal`
[INFO] [stderr]   --> src/formalgrammar/symbol.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn is_terminal(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_nonterminal`
[INFO] [stderr]   --> src/formalgrammar/symbol.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn is_nonterminal(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "27ba8534bf80cde34dad84666f265c834a1614b16d7e6c02297b5cb2a1370693"`
[INFO] running `"docker" "rm" "-f" "27ba8534bf80cde34dad84666f265c834a1614b16d7e6c02297b5cb2a1370693"`
[INFO] [stdout] 27ba8534bf80cde34dad84666f265c834a1614b16d7e6c02297b5cb2a1370693
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-1/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/whothey/firstfollow:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] 804b3dd83ae7b7c86b392426c404a45aad96080f9d3bf45810d96c8d6f1bb59c
[INFO] running `"docker" "start" "-a" "804b3dd83ae7b7c86b392426c404a45aad96080f9d3bf45810d96c8d6f1bb59c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/firstfollow-cf9bff42f1857a7f
[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" "804b3dd83ae7b7c86b392426c404a45aad96080f9d3bf45810d96c8d6f1bb59c"`
[INFO] running `"docker" "rm" "-f" "804b3dd83ae7b7c86b392426c404a45aad96080f9d3bf45810d96c8d6f1bb59c"`
[INFO] [stdout] 804b3dd83ae7b7c86b392426c404a45aad96080f9d3bf45810d96c8d6f1bb59c