Dec 18 04:23:22.669 INFO checking akuraj/learn_rust against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 04:23:22.669 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 04:23:23.179 INFO [stdout] 5734b38b5205075a0753d66b77e17fdaa559fbcce11461b36f2509009e0fba2a
Dec 18 04:23:23.181 INFO running `"docker" "start" "-a" "5734b38b5205075a0753d66b77e17fdaa559fbcce11461b36f2509009e0fba2a"`
Dec 18 04:23:25.912 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 18 04:23:26.423 INFO [stderr] warning: unused variable: `x`
Dec 18 04:23:26.423 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 18 04:23:26.423 INFO [stderr]   |
Dec 18 04:23:26.423 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:26.423 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 18 04:23:26.423 INFO [stderr]   |
Dec 18 04:23:26.423 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 04:23:26.423 INFO [stderr] 
Dec 18 04:23:26.424 INFO [stderr] warning: unused variable: `z`
Dec 18 04:23:26.424 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 18 04:23:26.424 INFO [stderr]   |
Dec 18 04:23:26.424 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:26.424 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 18 04:23:26.424 INFO [stderr] 
Dec 18 04:23:26.424 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 18 04:23:26.424 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 18 04:23:26.425 INFO [stderr]   |
Dec 18 04:23:26.425 INFO [stderr] 9 |     let a: &u32;
Dec 18 04:23:26.425 INFO [stderr]   |         ^
Dec 18 04:23:26.425 INFO [stderr]   |
Dec 18 04:23:26.425 INFO [stderr]   = note: consider using `_a` instead
Dec 18 04:23:26.425 INFO [stderr] 
Dec 18 04:23:26.425 INFO [stderr] warning: value assigned to `a` is never read
Dec 18 04:23:26.425 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 18 04:23:26.425 INFO [stderr]    |
Dec 18 04:23:26.425 INFO [stderr] 15 |         a = {
Dec 18 04:23:26.425 INFO [stderr]    |         ^
Dec 18 04:23:26.425 INFO [stderr]    |
Dec 18 04:23:26.425 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 04:23:26.425 INFO [stderr] 
Dec 18 04:23:26.469 INFO [stderr] warning: unused variable: `x`
Dec 18 04:23:26.469 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 18 04:23:26.469 INFO [stderr]   |
Dec 18 04:23:26.470 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:26.470 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 18 04:23:26.470 INFO [stderr]   |
Dec 18 04:23:26.470 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 04:23:26.470 INFO [stderr] 
Dec 18 04:23:26.471 INFO [stderr] warning: unused variable: `z`
Dec 18 04:23:26.471 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 18 04:23:26.471 INFO [stderr]   |
Dec 18 04:23:26.472 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:26.472 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 18 04:23:26.472 INFO [stderr] 
Dec 18 04:23:26.473 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 18 04:23:26.473 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 18 04:23:26.473 INFO [stderr]   |
Dec 18 04:23:26.473 INFO [stderr] 9 |     let a: &u32;
Dec 18 04:23:26.474 INFO [stderr]   |         ^
Dec 18 04:23:26.474 INFO [stderr]   |
Dec 18 04:23:26.474 INFO [stderr]   = note: consider using `_a` instead
Dec 18 04:23:26.474 INFO [stderr] 
Dec 18 04:23:26.474 INFO [stderr] warning: value assigned to `a` is never read
Dec 18 04:23:26.475 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 18 04:23:26.475 INFO [stderr]    |
Dec 18 04:23:26.475 INFO [stderr] 15 |         a = {
Dec 18 04:23:26.476 INFO [stderr]    |         ^
Dec 18 04:23:26.476 INFO [stderr]    |
Dec 18 04:23:26.476 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 04:23:26.476 INFO [stderr] 
Dec 18 04:23:26.566 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
Dec 18 04:23:27.734 INFO running `"docker" "inspect" "5734b38b5205075a0753d66b77e17fdaa559fbcce11461b36f2509009e0fba2a"`
Dec 18 04:23:28.026 INFO running `"docker" "rm" "-f" "5734b38b5205075a0753d66b77e17fdaa559fbcce11461b36f2509009e0fba2a"`
Dec 18 04:23:28.311 INFO [stdout] 5734b38b5205075a0753d66b77e17fdaa559fbcce11461b36f2509009e0fba2a