Dec 18 04:23:28.384 INFO checking akuraj/learn_rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 04:23:28.384 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 04:23:28.944 INFO [stdout] 22d45a1bbbf5514497174867fae645b03312ef8af0a06977cf24698297d63e63
Dec 18 04:23:28.947 INFO running `"docker" "start" "-a" "22d45a1bbbf5514497174867fae645b03312ef8af0a06977cf24698297d63e63"`
Dec 18 04:23:31.313 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 18 04:23:31.756 INFO [stderr] warning: unused variable: `x`
Dec 18 04:23:31.757 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 18 04:23:31.757 INFO [stderr]   |
Dec 18 04:23:31.757 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:31.757 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 18 04:23:31.758 INFO [stderr]   |
Dec 18 04:23:31.758 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 04:23:31.758 INFO [stderr] 
Dec 18 04:23:31.758 INFO [stderr] warning: unused variable: `z`
Dec 18 04:23:31.758 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 18 04:23:31.758 INFO [stderr]   |
Dec 18 04:23:31.758 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:31.758 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 18 04:23:31.758 INFO [stderr] 
Dec 18 04:23:31.758 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 18 04:23:31.758 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 18 04:23:31.758 INFO [stderr]   |
Dec 18 04:23:31.758 INFO [stderr] 9 |     let a: &u32;
Dec 18 04:23:31.758 INFO [stderr]   |         ^
Dec 18 04:23:31.758 INFO [stderr]   |
Dec 18 04:23:31.758 INFO [stderr]   = note: consider using `_a` instead
Dec 18 04:23:31.758 INFO [stderr] 
Dec 18 04:23:31.758 INFO [stderr] warning: value assigned to `a` is never read
Dec 18 04:23:31.758 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 18 04:23:31.758 INFO [stderr]    |
Dec 18 04:23:31.758 INFO [stderr] 15 |         a = {
Dec 18 04:23:31.758 INFO [stderr]    |         ^
Dec 18 04:23:31.758 INFO [stderr]    |
Dec 18 04:23:31.758 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 04:23:31.758 INFO [stderr] 
Dec 18 04:23:31.784 INFO [stderr] warning: unused variable: `x`
Dec 18 04:23:31.785 INFO [stderr]  --> src/test_lifetimes.rs:1:34
Dec 18 04:23:31.785 INFO [stderr]   |
Dec 18 04:23:31.785 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:31.785 INFO [stderr]   |                                  ^ help: consider using `_x` instead
Dec 18 04:23:31.786 INFO [stderr]   |
Dec 18 04:23:31.786 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 18 04:23:31.786 INFO [stderr] 
Dec 18 04:23:31.787 INFO [stderr] warning: unused variable: `z`
Dec 18 04:23:31.787 INFO [stderr]  --> src/test_lifetimes.rs:1:58
Dec 18 04:23:31.787 INFO [stderr]   |
Dec 18 04:23:31.787 INFO [stderr] 1 | pub fn foo< 'c, 'b, 'a/*: 'b*/>( x: &'a u32, y: &'b u32, z: &'c u32 ) -> &'b u32 {
Dec 18 04:23:31.787 INFO [stderr]   |                                                          ^ help: consider using `_z` instead
Dec 18 04:23:31.787 INFO [stderr] 
Dec 18 04:23:31.787 INFO [stderr] warning: variable `a` is assigned to, but never used
Dec 18 04:23:31.787 INFO [stderr]  --> src/test_lifetimes.rs:9:9
Dec 18 04:23:31.787 INFO [stderr]   |
Dec 18 04:23:31.787 INFO [stderr] 9 |     let a: &u32;
Dec 18 04:23:31.787 INFO [stderr]   |         ^
Dec 18 04:23:31.787 INFO [stderr]   |
Dec 18 04:23:31.787 INFO [stderr]   = note: consider using `_a` instead
Dec 18 04:23:31.787 INFO [stderr] 
Dec 18 04:23:31.787 INFO [stderr] warning: value assigned to `a` is never read
Dec 18 04:23:31.787 INFO [stderr]   --> src/test_lifetimes.rs:15:9
Dec 18 04:23:31.787 INFO [stderr]    |
Dec 18 04:23:31.787 INFO [stderr] 15 |         a = {
Dec 18 04:23:31.787 INFO [stderr]    |         ^
Dec 18 04:23:31.787 INFO [stderr]    |
Dec 18 04:23:31.787 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 04:23:31.787 INFO [stderr] 
Dec 18 04:23:31.903 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
Dec 18 04:23:33.426 INFO running `"docker" "inspect" "22d45a1bbbf5514497174867fae645b03312ef8af0a06977cf24698297d63e63"`
Dec 18 04:23:33.770 INFO running `"docker" "rm" "-f" "22d45a1bbbf5514497174867fae645b03312ef8af0a06977cf24698297d63e63"`
Dec 18 04:23:34.153 INFO [stdout] 22d45a1bbbf5514497174867fae645b03312ef8af0a06977cf24698297d63e63