Dec 04 16:42:05.620 INFO checking jevankovich/rpncalc against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 16:42:05.620 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 16:42:06.167 INFO [stdout] 347b01f8fc7c0e198ce725f01ce1d5772a6935fd361f0ab5542e23fa47a5b296
Dec 04 16:42:06.169 INFO running `"docker" "start" "-a" "347b01f8fc7c0e198ce725f01ce1d5772a6935fd361f0ab5542e23fa47a5b296"`
Dec 04 16:42:07.724 INFO [stderr] usermod: no changes
Dec 04 16:42:07.755 INFO [stderr]     Checking rpncalc v0.1.0 (/source)
Dec 04 16:42:08.195 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 04 16:42:08.207 INFO [stderr]  --> src/main.rs:4:5
Dec 04 16:42:08.207 INFO [stderr]   |
Dec 04 16:42:08.207 INFO [stderr] 4 | use std::collections::HashMap;
Dec 04 16:42:08.207 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:42:08.207 INFO [stderr]   |
Dec 04 16:42:08.207 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 16:42:08.207 INFO [stderr] 
Dec 04 16:42:08.207 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 04 16:42:08.207 INFO [stderr]  --> src/main.rs:5:5
Dec 04 16:42:08.207 INFO [stderr]   |
Dec 04 16:42:08.207 INFO [stderr] 5 | use std::rc::Rc;
Dec 04 16:42:08.207 INFO [stderr]   |     ^^^^^^^^^^^
Dec 04 16:42:08.207 INFO [stderr] 
Dec 04 16:42:08.287 INFO [stderr] warning: unused variable: `err`
Dec 04 16:42:08.287 INFO [stderr]   --> src/main.rs:45:17
Dec 04 16:42:08.287 INFO [stderr]    |
Dec 04 16:42:08.287 INFO [stderr] 45 |             Err(err) => println!("Unknown word: \"{}\"", word),
Dec 04 16:42:08.287 INFO [stderr]    |                 ^^^ help: consider using `_err` instead
Dec 04 16:42:08.287 INFO [stderr]    |
Dec 04 16:42:08.287 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 16:42:08.287 INFO [stderr] 
Dec 04 16:42:08.315 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:42:08.315 INFO [stderr]   --> src/main.rs:78:5
Dec 04 16:42:08.315 INFO [stderr]    |
Dec 04 16:42:08.315 INFO [stderr] 78 |     stdout.flush();
Dec 04 16:42:08.315 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 04 16:42:08.315 INFO [stderr]    |
Dec 04 16:42:08.315 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 16:42:08.315 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:42:08.315 INFO [stderr] 
Dec 04 16:42:08.315 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:42:08.315 INFO [stderr]   --> src/main.rs:87:9
Dec 04 16:42:08.315 INFO [stderr]    |
Dec 04 16:42:08.315 INFO [stderr] 87 |         stdout.flush();
Dec 04 16:42:08.315 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 04 16:42:08.315 INFO [stderr]    |
Dec 04 16:42:08.315 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:42:08.315 INFO [stderr] 
Dec 04 16:42:08.351 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 04 16:42:08.351 INFO [stderr]  --> src/main.rs:4:5
Dec 04 16:42:08.354 INFO [stderr]   |
Dec 04 16:42:08.355 INFO [stderr] 4 | use std::collections::HashMap;
Dec 04 16:42:08.355 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 16:42:08.355 INFO [stderr]   |
Dec 04 16:42:08.355 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 04 16:42:08.355 INFO [stderr] 
Dec 04 16:42:08.355 INFO [stderr] warning: unused import: `std::rc::Rc`
Dec 04 16:42:08.355 INFO [stderr]  --> src/main.rs:5:5
Dec 04 16:42:08.355 INFO [stderr]   |
Dec 04 16:42:08.355 INFO [stderr] 5 | use std::rc::Rc;
Dec 04 16:42:08.355 INFO [stderr]   |     ^^^^^^^^^^^
Dec 04 16:42:08.355 INFO [stderr] 
Dec 04 16:42:08.392 INFO [stderr] warning: unused variable: `err`
Dec 04 16:42:08.392 INFO [stderr]   --> src/main.rs:45:17
Dec 04 16:42:08.393 INFO [stderr]    |
Dec 04 16:42:08.393 INFO [stderr] 45 |             Err(err) => println!("Unknown word: \"{}\"", word),
Dec 04 16:42:08.393 INFO [stderr]    |                 ^^^ help: consider using `_err` instead
Dec 04 16:42:08.412 INFO [stderr]    |
Dec 04 16:42:08.412 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 16:42:08.412 INFO [stderr] 
Dec 04 16:42:08.417 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:42:08.418 INFO [stderr]   --> src/main.rs:78:5
Dec 04 16:42:08.418 INFO [stderr]    |
Dec 04 16:42:08.418 INFO [stderr] 78 |     stdout.flush();
Dec 04 16:42:08.418 INFO [stderr]    |     ^^^^^^^^^^^^^^^
Dec 04 16:42:08.418 INFO [stderr]    |
Dec 04 16:42:08.418 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 04 16:42:08.418 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:42:08.418 INFO [stderr] 
Dec 04 16:42:08.418 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 16:42:08.418 INFO [stderr]   --> src/main.rs:87:9
Dec 04 16:42:08.418 INFO [stderr]    |
Dec 04 16:42:08.418 INFO [stderr] 87 |         stdout.flush();
Dec 04 16:42:08.418 INFO [stderr]    |         ^^^^^^^^^^^^^^^
Dec 04 16:42:08.418 INFO [stderr]    |
Dec 04 16:42:08.418 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 16:42:08.418 INFO [stderr] 
Dec 04 16:42:08.439 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Dec 04 16:42:08.441 INFO [stderr] su: No module specific data is present
Dec 04 16:42:08.809 INFO running `"docker" "inspect" "347b01f8fc7c0e198ce725f01ce1d5772a6935fd361f0ab5542e23fa47a5b296"`
Dec 04 16:42:08.945 INFO running `"docker" "rm" "-f" "347b01f8fc7c0e198ce725f01ce1d5772a6935fd361f0ab5542e23fa47a5b296"`
Dec 04 16:42:09.158 INFO [stdout] 347b01f8fc7c0e198ce725f01ce1d5772a6935fd361f0ab5542e23fa47a5b296