Dec 19 20:51:05.329 INFO checking akuraj/learn_rust against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 20:51:05.329 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/akuraj/learn_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 20:51:05.860 INFO [stdout] 9233b0ac6a6d4e7e8881f1925c4a5f371c55c66feceb2425c1a4408c211d7906
Dec 19 20:51:05.863 INFO running `"docker" "start" "-a" "9233b0ac6a6d4e7e8881f1925c4a5f371c55c66feceb2425c1a4408c211d7906"`
Dec 19 20:51:07.857 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 19 20:51:08.272 INFO [stderr] warning: unused variable: `x`
Dec 19 20:51:08.273 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 19 20:51:08.273 INFO [stderr]   |
Dec 19 20:51:08.273 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 19 20:51:08.274 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 19 20:51:08.274 INFO [stderr]   |
Dec 19 20:51:08.274 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 20:51:08.274 INFO [stderr] 
Dec 19 20:51:08.274 INFO [stderr] warning: unused variable: `z`
Dec 19 20:51:08.275 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 19 20:51:08.275 INFO [stderr]   |
Dec 19 20:51:08.275 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 19 20:51:08.275 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 19 20:51:08.276 INFO [stderr] 
Dec 19 20:51:08.276 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 19 20:51:08.276 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 19 20:51:08.276 INFO [stderr]   |
Dec 19 20:51:08.277 INFO [stderr] 9 |     let a: &u32;
Dec 19 20:51:08.277 INFO [stderr]   |         ^
Dec 19 20:51:08.277 INFO [stderr]   |
Dec 19 20:51:08.278 INFO [stderr]   = note: consider using `_a` instead
Dec 19 20:51:08.278 INFO [stderr] 
Dec 19 20:51:08.278 INFO [stderr] warning: value assigned to `a` is never read
Dec 19 20:51:08.278 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 19 20:51:08.278 INFO [stderr]    |
Dec 19 20:51:08.278 INFO [stderr] 15 |         a = {
Dec 19 20:51:08.278 INFO [stderr]    |         ^
Dec 19 20:51:08.278 INFO [stderr]    |
Dec 19 20:51:08.278 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 20:51:08.278 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 20:51:08.278 INFO [stderr] 
Dec 19 20:51:08.307 INFO [stderr] warning: unused variable: `x`
Dec 19 20:51:08.307 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 19 20:51:08.307 INFO [stderr]   |
Dec 19 20:51:08.307 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 19 20:51:08.307 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 19 20:51:08.308 INFO [stderr]   |
Dec 19 20:51:08.308 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 19 20:51:08.308 INFO [stderr] 
Dec 19 20:51:08.308 INFO [stderr] warning: unused variable: `z`
Dec 19 20:51:08.308 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 19 20:51:08.308 INFO [stderr]   |
Dec 19 20:51:08.308 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 19 20:51:08.308 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 19 20:51:08.309 INFO [stderr] 
Dec 19 20:51:08.309 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 19 20:51:08.309 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 19 20:51:08.309 INFO [stderr]   |
Dec 19 20:51:08.309 INFO [stderr] 9 |     let a: &u32;
Dec 19 20:51:08.309 INFO [stderr]   |         ^
Dec 19 20:51:08.309 INFO [stderr]   |
Dec 19 20:51:08.310 INFO [stderr]   = note: consider using `_a` instead
Dec 19 20:51:08.310 INFO [stderr] 
Dec 19 20:51:08.310 INFO [stderr] warning: value assigned to `a` is never read
Dec 19 20:51:08.310 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 19 20:51:08.310 INFO [stderr]    |
Dec 19 20:51:08.310 INFO [stderr] 15 |         a = {
Dec 19 20:51:08.310 INFO [stderr]    |         ^
Dec 19 20:51:08.310 INFO [stderr]    |
Dec 19 20:51:08.310 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 19 20:51:08.311 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 20:51:08.311 INFO [stderr] 
Dec 19 20:51:08.399 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
Dec 19 20:51:09.578 INFO running `"docker" "inspect" "9233b0ac6a6d4e7e8881f1925c4a5f371c55c66feceb2425c1a4408c211d7906"`
Dec 19 20:51:09.866 INFO running `"docker" "rm" "-f" "9233b0ac6a6d4e7e8881f1925c4a5f371c55c66feceb2425c1a4408c211d7906"`
Dec 19 20:51:10.184 INFO [stdout] 9233b0ac6a6d4e7e8881f1925c4a5f371c55c66feceb2425c1a4408c211d7906