Dec 19 22:03:55.528 INFO checking RussellSprouts/6502-language-rust against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 22:03:55.528 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/RussellSprouts/6502-language-rust:/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 22:03:55.673 INFO [stdout] 9ce0edf1764fff8f8731701cf926a0e81770e05e3f9ab27b6d7483c5f46bc08d
Dec 19 22:03:55.675 INFO running `"docker" "start" "-a" "9ce0edf1764fff8f8731701cf926a0e81770e05e3f9ab27b6d7483c5f46bc08d"`
Dec 19 22:03:56.196 INFO [stderr]    Compiling libc v0.2.39
Dec 19 22:03:56.196 INFO [stderr]    Compiling im v10.0.0
Dec 19 22:03:56.196 INFO [stderr]     Checking regex v0.2.6
Dec 19 22:03:59.521 INFO [stderr]    Compiling memchr v2.0.1
Dec 19 22:04:00.977 INFO [stderr]    Compiling aho-corasick v0.6.4
Dec 19 22:04:12.672 INFO [stderr]    Compiling compiler v0.1.0 (/opt/crater/workdir)
Dec 19 22:04:15.228 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 22:04:15.229 INFO [stderr]  --> main.rs:6:1
Dec 19 22:04:15.229 INFO [stderr]   |
Dec 19 22:04:15.229 INFO [stderr] 6 | #[macro_use]
Dec 19 22:04:15.230 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 22:04:15.230 INFO [stderr]   |
Dec 19 22:04:15.230 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 22:04:15.230 INFO [stderr] 
Dec 19 22:04:15.248 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 22:04:15.249 INFO [stderr]  --> main.rs:6:1
Dec 19 22:04:15.249 INFO [stderr]   |
Dec 19 22:04:15.249 INFO [stderr] 6 | #[macro_use]
Dec 19 22:04:15.249 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 22:04:15.250 INFO [stderr]   |
Dec 19 22:04:15.250 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 22:04:15.250 INFO [stderr] 
Dec 19 22:04:16.332 INFO [stderr] warning: variable does not need to be mutable
Dec 19 22:04:16.333 INFO [stderr]    --> main.rs:327:9
Dec 19 22:04:16.333 INFO [stderr]     |
Dec 19 22:04:16.333 INFO [stderr] 327 |     let mut parsed: &Expression2;
Dec 19 22:04:16.333 INFO [stderr]     |         ----^^^^^^
Dec 19 22:04:16.334 INFO [stderr]     |         |
Dec 19 22:04:16.334 INFO [stderr]     |         help: remove this `mut`
Dec 19 22:04:16.334 INFO [stderr]     |
Dec 19 22:04:16.334 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 22:04:16.334 INFO [stderr] 
Dec 19 22:04:16.444 INFO [stderr] warning: variable does not need to be mutable
Dec 19 22:04:16.445 INFO [stderr]    --> main.rs:327:9
Dec 19 22:04:16.445 INFO [stderr]     |
Dec 19 22:04:16.445 INFO [stderr] 327 |     let mut parsed: &Expression2;
Dec 19 22:04:16.445 INFO [stderr]     |         ----^^^^^^
Dec 19 22:04:16.446 INFO [stderr]     |         |
Dec 19 22:04:16.446 INFO [stderr]     |         help: remove this `mut`
Dec 19 22:04:16.446 INFO [stderr]     |
Dec 19 22:04:16.446 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 19 22:04:16.446 INFO [stderr] 
Dec 19 22:04:16.884 INFO [stderr] warning: method is never used: `size`
Dec 19 22:04:16.885 INFO [stderr]    --> main.rs:264:5
Dec 19 22:04:16.885 INFO [stderr]     |
Dec 19 22:04:16.885 INFO [stderr] 264 |     fn size(&self) -> u64 {
Dec 19 22:04:16.886 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:04:16.904 INFO [stderr]     |
Dec 19 22:04:16.905 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 22:04:16.905 INFO [stderr] 
Dec 19 22:04:16.905 INFO [stderr] warning: the feature `underscore_lifetimes` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 22:04:16.905 INFO [stderr]  --> main.rs:2:12
Dec 19 22:04:16.906 INFO [stderr]   |
Dec 19 22:04:16.906 INFO [stderr] 2 | #![feature(underscore_lifetimes)]
Dec 19 22:04:16.906 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
Dec 19 22:04:16.906 INFO [stderr]   |
Dec 19 22:04:16.907 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 22:04:16.907 INFO [stderr] 
Dec 19 22:04:17.008 INFO [stderr] warning: method is never used: `size`
Dec 19 22:04:17.009 INFO [stderr]    --> main.rs:264:5
Dec 19 22:04:17.009 INFO [stderr]     |
Dec 19 22:04:17.009 INFO [stderr] 264 |     fn size(&self) -> u64 {
Dec 19 22:04:17.010 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:04:17.010 INFO [stderr]     |
Dec 19 22:04:17.010 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 19 22:04:17.010 INFO [stderr] 
Dec 19 22:04:17.010 INFO [stderr] warning: the feature `underscore_lifetimes` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 22:04:17.011 INFO [stderr]  --> main.rs:2:12
Dec 19 22:04:17.011 INFO [stderr]   |
Dec 19 22:04:17.011 INFO [stderr] 2 | #![feature(underscore_lifetimes)]
Dec 19 22:04:17.011 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^
Dec 19 22:04:17.012 INFO [stderr]   |
Dec 19 22:04:17.012 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 22:04:17.012 INFO [stderr] 
Dec 19 22:04:17.061 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.94s
Dec 19 22:04:18.735 INFO running `"docker" "inspect" "9ce0edf1764fff8f8731701cf926a0e81770e05e3f9ab27b6d7483c5f46bc08d"`
Dec 19 22:04:19.030 INFO running `"docker" "rm" "-f" "9ce0edf1764fff8f8731701cf926a0e81770e05e3f9ab27b6d7483c5f46bc08d"`
Dec 19 22:04:19.300 INFO [stdout] 9ce0edf1764fff8f8731701cf926a0e81770e05e3f9ab27b6d7483c5f46bc08d