Dec 19 15:37:38.390 INFO checking ironlang/iron against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:37:38.390 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/ironlang/iron:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:37:38.842 INFO [stdout] d9cde64ea96d1df617f08bfb08843b9c8dd3816d710a725812b616fce39090dc
Dec 19 15:37:38.844 INFO running `"docker" "start" "-a" "d9cde64ea96d1df617f08bfb08843b9c8dd3816d710a725812b616fce39090dc"`
Dec 19 15:37:41.633 INFO [stderr]    Compiling cranelift-entity v0.25.0
Dec 19 15:37:41.676 INFO [stderr]    Compiling target-lexicon v0.2.0
Dec 19 15:37:41.680 INFO [stderr]     Checking failure v0.1.3
Dec 19 15:37:43.277 INFO [stderr]    Compiling cranelift-codegen-meta v0.25.0
Dec 19 15:37:43.418 INFO [stderr]     Checking cranelift-bforest v0.25.0
Dec 19 15:37:48.013 INFO [stderr]    Compiling cranelift-codegen v0.25.0
Dec 19 15:38:01.988 INFO [stderr]     Checking cranelift-frontend v0.25.0
Dec 19 15:38:02.790 INFO [stderr]     Checking iron v0.0.1 (/opt/crater/workdir)
Dec 19 15:38:03.200 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:03.200 INFO [stderr]  --> src/iron/codegen.rs:4:5
Dec 19 15:38:03.200 INFO [stderr]   |
Dec 19 15:38:03.200 INFO [stderr] 4 | use std::fs::File;
Dec 19 15:38:03.200 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:03.200 INFO [stderr]   |
Dec 19 15:38:03.200 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:03.200 INFO [stderr] 
Dec 19 15:38:03.200 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:03.201 INFO [stderr]  --> src/iron/codegen.rs:5:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 5 | use std::io::prelude::*;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `iron::token::Token`
Dec 19 15:38:03.201 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 8 | use iron::token::Token;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `iron::expression::Expression`
Dec 19 15:38:03.201 INFO [stderr]  --> src/main.rs:9:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 9 | use iron::expression::Expression;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:03.201 INFO [stderr]  --> src/iron/codegen.rs:4:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 4 | use std::fs::File;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:03.201 INFO [stderr]  --> src/iron/codegen.rs:5:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 5 | use std::io::prelude::*;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `iron::token::Token`
Dec 19 15:38:03.201 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 8 | use iron::token::Token;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.201 INFO [stderr] warning: unused import: `iron::expression::Expression`
Dec 19 15:38:03.201 INFO [stderr]  --> src/main.rs:9:5
Dec 19 15:38:03.201 INFO [stderr]   |
Dec 19 15:38:03.201 INFO [stderr] 9 | use iron::expression::Expression;
Dec 19 15:38:03.201 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:03.201 INFO [stderr] 
Dec 19 15:38:03.334 INFO [stderr] warning: unused variable: `source`
Dec 19 15:38:03.334 INFO [stderr]   --> src/main.rs:24:17
Dec 19 15:38:03.334 INFO [stderr]    |
Dec 19 15:38:03.334 INFO [stderr] 24 |     if let Some(source) = matches.value_of("INPUT") {
Dec 19 15:38:03.334 INFO [stderr]    |                 ^^^^^^ help: consider using `_source` instead
Dec 19 15:38:03.334 INFO [stderr]    |
Dec 19 15:38:03.334 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:38:03.334 INFO [stderr] 
Dec 19 15:38:03.338 INFO [stderr] warning: unused variable: `source`
Dec 19 15:38:03.339 INFO [stderr]   --> src/main.rs:24:17
Dec 19 15:38:03.339 INFO [stderr]    |
Dec 19 15:38:03.339 INFO [stderr] 24 |     if let Some(source) = matches.value_of("INPUT") {
Dec 19 15:38:03.339 INFO [stderr]    |                 ^^^^^^ help: consider using `_source` instead
Dec 19 15:38:03.339 INFO [stderr]    |
Dec 19 15:38:03.339 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 15:38:03.339 INFO [stderr] 
Dec 19 15:38:03.446 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.97s
Dec 19 15:38:04.054 INFO running `"docker" "inspect" "d9cde64ea96d1df617f08bfb08843b9c8dd3816d710a725812b616fce39090dc"`
Dec 19 15:38:04.302 INFO running `"docker" "rm" "-f" "d9cde64ea96d1df617f08bfb08843b9c8dd3816d710a725812b616fce39090dc"`
Dec 19 15:38:04.612 INFO [stdout] d9cde64ea96d1df617f08bfb08843b9c8dd3816d710a725812b616fce39090dc