Dec 17 22:48:42.048 INFO checking ironlang/iron against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 22:48:42.049 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 22:48:42.487 INFO [stdout] 4f00f99f2274e7cd235f993acd4b1476633f58bf81ee7f8b3a54468d9a21c8b5
Dec 17 22:48:42.489 INFO running `"docker" "start" "-a" "4f00f99f2274e7cd235f993acd4b1476633f58bf81ee7f8b3a54468d9a21c8b5"`
Dec 17 22:48:44.878 INFO [stderr]    Compiling cranelift-entity v0.25.0
Dec 17 22:48:44.901 INFO [stderr]    Compiling target-lexicon v0.2.0
Dec 17 22:48:44.901 INFO [stderr]     Checking failure v0.1.3
Dec 17 22:48:46.450 INFO [stderr]     Checking cranelift-bforest v0.25.0
Dec 17 22:48:46.792 INFO [stderr]    Compiling cranelift-codegen-meta v0.25.0
Dec 17 22:48:50.512 INFO [stderr]    Compiling cranelift-codegen v0.25.0
Dec 17 22:49:03.216 INFO [stderr]     Checking cranelift-frontend v0.25.0
Dec 17 22:49:03.832 INFO [stderr]     Checking iron v0.0.1 (/opt/crater/workdir)
Dec 17 22:49:04.176 INFO [stderr] warning: unused import: `std::fs::File`
Dec 17 22:49:04.176 INFO [stderr]  --> src/iron/codegen.rs:4:5
Dec 17 22:49:04.176 INFO [stderr]   |
Dec 17 22:49:04.176 INFO [stderr] 4 | use std::fs::File;
Dec 17 22:49:04.176 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 17 22:49:04.176 INFO [stderr]   |
Dec 17 22:49:04.176 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 22:49:04.176 INFO [stderr] 
Dec 17 22:49:04.176 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 17 22:49:04.176 INFO [stderr]  --> src/iron/codegen.rs:5:5
Dec 17 22:49:04.176 INFO [stderr]   |
Dec 17 22:49:04.176 INFO [stderr] 5 | use std::io::prelude::*;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `iron::token::Token`
Dec 17 22:49:04.177 INFO [stderr]  --> src/main.rs:8:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 8 | use iron::token::Token;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `iron::expression::Expression`
Dec 17 22:49:04.177 INFO [stderr]  --> src/main.rs:9:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 9 | use iron::expression::Expression;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `std::fs::File`
Dec 17 22:49:04.177 INFO [stderr]  --> src/iron/codegen.rs:4:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 4 | use std::fs::File;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 17 22:49:04.177 INFO [stderr]  --> src/iron/codegen.rs:5:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 5 | use std::io::prelude::*;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `iron::token::Token`
Dec 17 22:49:04.177 INFO [stderr]  --> src/main.rs:8:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 8 | use iron::token::Token;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.177 INFO [stderr] warning: unused import: `iron::expression::Expression`
Dec 17 22:49:04.177 INFO [stderr]  --> src/main.rs:9:5
Dec 17 22:49:04.177 INFO [stderr]   |
Dec 17 22:49:04.177 INFO [stderr] 9 | use iron::expression::Expression;
Dec 17 22:49:04.177 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 22:49:04.177 INFO [stderr] 
Dec 17 22:49:04.288 INFO [stderr] warning: unused variable: `source`
Dec 17 22:49:04.288 INFO [stderr]   --> src/main.rs:24:17
Dec 17 22:49:04.288 INFO [stderr]    |
Dec 17 22:49:04.288 INFO [stderr] 24 |     if let Some(source) = matches.value_of("INPUT") {
Dec 17 22:49:04.288 INFO [stderr]    |                 ^^^^^^ help: consider using `_source` instead
Dec 17 22:49:04.288 INFO [stderr]    |
Dec 17 22:49:04.288 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 22:49:04.288 INFO [stderr] 
Dec 17 22:49:04.296 INFO [stderr] warning: unused variable: `source`
Dec 17 22:49:04.296 INFO [stderr]   --> src/main.rs:24:17
Dec 17 22:49:04.296 INFO [stderr]    |
Dec 17 22:49:04.296 INFO [stderr] 24 |     if let Some(source) = matches.value_of("INPUT") {
Dec 17 22:49:04.296 INFO [stderr]    |                 ^^^^^^ help: consider using `_source` instead
Dec 17 22:49:04.296 INFO [stderr]    |
Dec 17 22:49:04.296 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 22:49:04.296 INFO [stderr] 
Dec 17 22:49:04.361 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.61s
Dec 17 22:49:04.590 INFO running `"docker" "inspect" "4f00f99f2274e7cd235f993acd4b1476633f58bf81ee7f8b3a54468d9a21c8b5"`
Dec 17 22:49:04.713 INFO running `"docker" "rm" "-f" "4f00f99f2274e7cd235f993acd4b1476633f58bf81ee7f8b3a54468d9a21c8b5"`
Dec 17 22:49:04.819 INFO [stdout] 4f00f99f2274e7cd235f993acd4b1476633f58bf81ee7f8b3a54468d9a21c8b5