[INFO] updating cached repository sakateka/plt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sakateka/plt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sakateka/plt" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sakateka/plt"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sakateka/plt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sakateka/plt" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sakateka/plt"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sakateka/plt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 68d89b1c6e02bddcedbfa36c6e7a04843a46076f
[INFO] sha for GitHub repo sakateka/plt: 68d89b1c6e02bddcedbfa36c6e7a04843a46076f
[INFO] validating manifest of sakateka/plt 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 sakateka/plt 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 sakateka/plt
[INFO] finished frobbing sakateka/plt
[INFO] frobbed toml for sakateka/plt written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/sakateka/plt/Cargo.toml
[INFO] started frobbing sakateka/plt
[INFO] finished frobbing sakateka/plt
[INFO] frobbed toml for sakateka/plt written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sakateka/plt/Cargo.toml
[INFO] crate sakateka/plt 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 sakateka/plt against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-7/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/sakateka/plt:/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] 027035849e2f9a30525595ba056926706d5e0ac8f5b020cdf4124c70400d5bd6
[INFO] running `"docker" "start" "-a" "027035849e2f9a30525595ba056926706d5e0ac8f5b020cdf4124c70400d5bd6"`
[INFO] [stderr]     Checking itertools v0.7.7
[INFO] [stderr]     Checking serde_yaml v0.7.3
[INFO] [stderr]     Checking clap v2.29.1
[INFO] [stderr]     Checking plt v5.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `sdt`
[INFO] [stderr]    --> src/cfg.rs:246:41
[INFO] [stderr]     |
[INFO] [stderr] 246 |     pub fn parse_production(line: &str, sdt: bool) -> io::Result<Vec<Production>> {
[INFO] [stderr]     |                                         ^^^ help: consider prefixing with an underscore: `_sdt`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cfg`
[INFO] [stderr]    --> src/cfg.rs:695:13
[INFO] [stderr]     |
[INFO] [stderr] 695 |         let cfg = cfg.eliminate_left_recursion();
[INFO] [stderr]     |             ^^^ help: consider prefixing with an underscore: `_cfg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rules`
[INFO] [stderr]   --> src/sdt.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let rules: SDTRules = match serde_yaml::from_reader(r) {
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_rules`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_sdt`
[INFO] [stderr]    --> src/cfg.rs:210:5
[INFO] [stderr]     |
[INFO] [stderr] 210 |     pub fn load_sdt(input_path: &str) -> io::Result<CFG> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_sdt_from_reader`
[INFO] [stderr]    --> src/cfg.rs:219:5
[INFO] [stderr]     |
[INFO] [stderr] 219 |     pub fn load_sdt_from_reader<R: Sized + BufRead>(r: R) -> io::Result<CFG> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `greibach`
[INFO] [stderr]    --> src/cfg.rs:693:5
[INFO] [stderr]     |
[INFO] [stderr] 693 |     pub fn greibach(&self) -> CFG {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `eliminate_left_recursion`
[INFO] [stderr]    --> src/cfg.rs:699:5
[INFO] [stderr]     |
[INFO] [stderr] 699 |     pub fn eliminate_left_recursion(&self) -> CFG {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SDT`
[INFO] [stderr]   --> src/sdt.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct SDT {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load`
[INFO] [stderr]   --> src/sdt.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn load(input_path: &str) -> io::Result<SDT> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_from_reader`
[INFO] [stderr]   --> src/sdt.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | /     pub fn load_from_reader<R: ?Sized + BufRead>(r: R) -> io::Result<SDT>
[INFO] [stderr] 31 | |     where
[INFO] [stderr] 32 | |         R: ::std::marker::Sized,
[INFO] [stderr] 33 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |         })
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sdt`
[INFO] [stderr]    --> src/cfg.rs:246:41
[INFO] [stderr]     |
[INFO] [stderr] 246 |     pub fn parse_production(line: &str, sdt: bool) -> io::Result<Vec<Production>> {
[INFO] [stderr]     |                                         ^^^ help: consider prefixing with an underscore: `_sdt`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `cfg`
[INFO] [stderr]    --> src/cfg.rs:695:13
[INFO] [stderr]     |
[INFO] [stderr] 695 |         let cfg = cfg.eliminate_left_recursion();
[INFO] [stderr]     |             ^^^ help: consider prefixing with an underscore: `_cfg`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rules`
[INFO] [stderr]   --> src/sdt.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let rules: SDTRules = match serde_yaml::from_reader(r) {
[INFO] [stderr]    |             ^^^^^ help: consider prefixing with an underscore: `_rules`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_sdt`
[INFO] [stderr]    --> src/cfg.rs:210:5
[INFO] [stderr]     |
[INFO] [stderr] 210 |     pub fn load_sdt(input_path: &str) -> io::Result<CFG> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_sdt_from_reader`
[INFO] [stderr]    --> src/cfg.rs:219:5
[INFO] [stderr]     |
[INFO] [stderr] 219 |     pub fn load_sdt_from_reader<R: Sized + BufRead>(r: R) -> io::Result<CFG> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `greibach`
[INFO] [stderr]    --> src/cfg.rs:693:5
[INFO] [stderr]     |
[INFO] [stderr] 693 |     pub fn greibach(&self) -> CFG {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `eliminate_left_recursion`
[INFO] [stderr]    --> src/cfg.rs:699:5
[INFO] [stderr]     |
[INFO] [stderr] 699 |     pub fn eliminate_left_recursion(&self) -> CFG {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SDT`
[INFO] [stderr]   --> src/sdt.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct SDT {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load`
[INFO] [stderr]   --> src/sdt.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn load(input_path: &str) -> io::Result<SDT> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `load_from_reader`
[INFO] [stderr]   --> src/sdt.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | /     pub fn load_from_reader<R: ?Sized + BufRead>(r: R) -> io::Result<SDT>
[INFO] [stderr] 31 | |     where
[INFO] [stderr] 32 | |         R: ::std::marker::Sized,
[INFO] [stderr] 33 | |     {
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |         })
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.21s
[INFO] running `"docker" "inspect" "027035849e2f9a30525595ba056926706d5e0ac8f5b020cdf4124c70400d5bd6"`
[INFO] running `"docker" "rm" "-f" "027035849e2f9a30525595ba056926706d5e0ac8f5b020cdf4124c70400d5bd6"`
[INFO] [stdout] 027035849e2f9a30525595ba056926706d5e0ac8f5b020cdf4124c70400d5bd6