Dec 19 15:14:46.665 INFO checking jevankovich/rpncalc against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 15:14:46.665 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/jevankovich/rpncalc:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:14:47.136 INFO [stdout] 58306a267afb397a2370f912842f701d16d074c7bfa9a175e129f53d7509a3d4
Dec 19 15:14:47.142 INFO running `"docker" "start" "-a" "58306a267afb397a2370f912842f701d16d074c7bfa9a175e129f53d7509a3d4"`
Dec 19 15:14:48.976 INFO [stderr]     Checking rpncalc v0.1.0 (/opt/crater/workdir)
Dec 19 15:14:49.348 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 19 15:14:49.348 INFO [stderr]  --> src/main.rs:4:5
Dec 19 15:14:49.348 INFO [stderr]   |
Dec 19 15:14:49.348 INFO [stderr] 4 | use std::collections::HashMap;
Dec 19 15:14:49.348 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:14:49.348 INFO [stderr]   |
Dec 19 15:14:49.348 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:14:49.348 INFO [stderr] 
Dec 19 15:14:49.348 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 19 15:14:49.348 INFO [stderr]  --> src/main.rs:5:5
Dec 19 15:14:49.348 INFO [stderr]   |
Dec 19 15:14:49.348 INFO [stderr] 5 | use std::rc::Rc;
Dec 19 15:14:49.348 INFO [stderr]   |     ^^^^^^^^^^^
Dec 19 15:14:49.348 INFO [stderr] 
Dec 19 15:14:49.356 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 19 15:14:49.356 INFO [stderr]  --> src/main.rs:4:5
Dec 19 15:14:49.356 INFO [stderr]   |
Dec 19 15:14:49.356 INFO [stderr] 4 | use std::collections::HashMap;
Dec 19 15:14:49.356 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:14:49.356 INFO [stderr]   |
Dec 19 15:14:49.356 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:14:49.356 INFO [stderr] 
Dec 19 15:14:49.356 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 19 15:14:49.356 INFO [stderr]  --> src/main.rs:5:5
Dec 19 15:14:49.356 INFO [stderr]   |
Dec 19 15:14:49.356 INFO [stderr] 5 | use std::rc::Rc;
Dec 19 15:14:49.356 INFO [stderr]   |     ^^^^^^^^^^^
Dec 19 15:14:49.356 INFO [stderr] 
Dec 19 15:14:49.427 INFO [stderr] warning: unused variable: `err`
Dec 19 15:14:49.427 INFO [stderr]   --> src/main.rs:45:17
Dec 19 15:14:49.427 INFO [stderr]    |
Dec 19 15:14:49.427 INFO [stderr] 45 |             Err(err) => println!("Unknown word: \"{}\"", word),
Dec 19 15:14:49.427 INFO [stderr]    |                 ^^^ help: consider using `_err` instead
Dec 19 15:14:49.427 INFO [stderr]    |
Dec 19 15:14:49.428 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:14:49.428 INFO [stderr] 
Dec 19 15:14:49.452 INFO [stderr] warning: unused variable: `err`
Dec 19 15:14:49.452 INFO [stderr]   --> src/main.rs:45:17
Dec 19 15:14:49.452 INFO [stderr]    |
Dec 19 15:14:49.452 INFO [stderr] 45 |             Err(err) => println!("Unknown word: \"{}\"", word),
Dec 19 15:14:49.452 INFO [stderr]    |                 ^^^ help: consider using `_err` instead
Dec 19 15:14:49.452 INFO [stderr]    |
Dec 19 15:14:49.452 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:14:49.452 INFO [stderr] 
Dec 19 15:14:49.460 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:49.460 INFO [stderr]   --> src/main.rs:78:5
Dec 19 15:14:49.460 INFO [stderr]    |
Dec 19 15:14:49.460 INFO [stderr] 78 |     stdout.flush();
Dec 19 15:14:49.460 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 15:14:49.460 INFO [stderr]    |
Dec 19 15:14:49.460 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:14:49.460 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:49.460 INFO [stderr] 
Dec 19 15:14:49.460 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:49.460 INFO [stderr]   --> src/main.rs:87:9
Dec 19 15:14:49.460 INFO [stderr]    |
Dec 19 15:14:49.460 INFO [stderr] 87 |         stdout.flush();
Dec 19 15:14:49.460 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 19 15:14:49.460 INFO [stderr]    |
Dec 19 15:14:49.460 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:49.460 INFO [stderr] 
Dec 19 15:14:49.496 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:49.496 INFO [stderr]   --> src/main.rs:78:5
Dec 19 15:14:49.496 INFO [stderr]    |
Dec 19 15:14:49.496 INFO [stderr] 78 |     stdout.flush();
Dec 19 15:14:49.496 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 19 15:14:49.496 INFO [stderr]    |
Dec 19 15:14:49.496 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 15:14:49.496 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:49.496 INFO [stderr] 
Dec 19 15:14:49.496 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 15:14:49.496 INFO [stderr]   --> src/main.rs:87:9
Dec 19 15:14:49.496 INFO [stderr]    |
Dec 19 15:14:49.496 INFO [stderr] 87 |         stdout.flush();
Dec 19 15:14:49.496 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 19 15:14:49.496 INFO [stderr]    |
Dec 19 15:14:49.496 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 15:14:49.496 INFO [stderr] 
Dec 19 15:14:49.524 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 19 15:14:50.442 INFO running `"docker" "inspect" "58306a267afb397a2370f912842f701d16d074c7bfa9a175e129f53d7509a3d4"`
Dec 19 15:14:50.694 INFO running `"docker" "rm" "-f" "58306a267afb397a2370f912842f701d16d074c7bfa9a175e129f53d7509a3d4"`
Dec 19 15:14:51.024 INFO [stdout] 58306a267afb397a2370f912842f701d16d074c7bfa9a175e129f53d7509a3d4