Dec 19 16:04:51.570 INFO checking hindenbug/rtstc against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:04:51.570 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/hindenbug/rtstc:/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 16:04:51.726 INFO [stdout] a7eaaddb57327e14cb03bac2fc5bca2382aeb791b478502ce19230d4d9227508
Dec 19 16:04:51.728 INFO running `"docker" "start" "-a" "a7eaaddb57327e14cb03bac2fc5bca2382aeb791b478502ce19230d4d9227508"`
Dec 19 16:04:52.197 INFO [stderr]     Checking rtstc v0.1.0 (/opt/crater/workdir)
Dec 19 16:04:52.439 INFO [stderr] warning: unused variable: `ast`
Dec 19 16:04:52.439 INFO [stderr]  --> src/traverser.rs:8:17
Dec 19 16:04:52.439 INFO [stderr]   |
Dec 19 16:04:52.439 INFO [stderr] 8 | pub fn traverse(ast: ::parser::Node) {
Dec 19 16:04:52.439 INFO [stderr]   |                 ^^^ help: consider using `_ast` instead
Dec 19 16:04:52.440 INFO [stderr]   |
Dec 19 16:04:52.440 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 16:04:52.440 INFO [stderr] 
Dec 19 16:04:52.457 INFO [stderr] warning: struct is never constructed: `Visitor`
Dec 19 16:04:52.457 INFO [stderr]  --> src/traverser.rs:1:1
Dec 19 16:04:52.457 INFO [stderr]   |
Dec 19 16:04:52.457 INFO [stderr] 1 | struct Visitor {
Dec 19 16:04:52.458 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 19 16:04:52.458 INFO [stderr]   |
Dec 19 16:04:52.458 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 16:04:52.458 INFO [stderr] 
Dec 19 16:04:52.458 INFO [stderr] warning: function is never used: `traverse`
Dec 19 16:04:52.458 INFO [stderr]  --> src/traverser.rs:8:1
Dec 19 16:04:52.458 INFO [stderr]   |
Dec 19 16:04:52.458 INFO [stderr] 8 | pub fn traverse(ast: ::parser::Node) {
Dec 19 16:04:52.458 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 16:04:52.458 INFO [stderr] 
Dec 19 16:04:52.475 INFO [stderr] warning: unused variable: `ast`
Dec 19 16:04:52.475 INFO [stderr]  --> src/traverser.rs:8:17
Dec 19 16:04:52.475 INFO [stderr]   |
Dec 19 16:04:52.475 INFO [stderr] 8 | pub fn traverse(ast: ::parser::Node) {
Dec 19 16:04:52.475 INFO [stderr]   |                 ^^^ help: consider using `_ast` instead
Dec 19 16:04:52.475 INFO [stderr]   |
Dec 19 16:04:52.475 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 16:04:52.475 INFO [stderr] 
Dec 19 16:04:52.503 INFO [stderr] warning: struct is never constructed: `Visitor`
Dec 19 16:04:52.503 INFO [stderr]  --> src/traverser.rs:1:1
Dec 19 16:04:52.503 INFO [stderr]   |
Dec 19 16:04:52.503 INFO [stderr] 1 | struct Visitor {
Dec 19 16:04:52.503 INFO [stderr]   | ^^^^^^^^^^^^^^
Dec 19 16:04:52.503 INFO [stderr]   |
Dec 19 16:04:52.503 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 16:04:52.503 INFO [stderr] 
Dec 19 16:04:52.523 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
Dec 19 16:04:52.819 INFO running `"docker" "inspect" "a7eaaddb57327e14cb03bac2fc5bca2382aeb791b478502ce19230d4d9227508"`
Dec 19 16:04:52.987 INFO running `"docker" "rm" "-f" "a7eaaddb57327e14cb03bac2fc5bca2382aeb791b478502ce19230d4d9227508"`
Dec 19 16:04:53.085 INFO [stdout] a7eaaddb57327e14cb03bac2fc5bca2382aeb791b478502ce19230d4d9227508