[INFO] cloning repository https://github.com/wa7sa34cx/rust-kladov
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wa7sa34cx/rust-kladov" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwa7sa34cx%2Frust-kladov", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwa7sa34cx%2Frust-kladov'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e017b6a61cad96bfbad415ffc9610a596ef47170
[INFO] checking wa7sa34cx/rust-kladov against try#6db1a6a7ebb2ad243051f3ff949f987dd70cde2b+rustflags=-Dreturn-local-variable-ptr for pr-134218
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwa7sa34cx%2Frust-kladov" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wa7sa34cx/rust-kladov on toolchain 6db1a6a7ebb2ad243051f3ff949f987dd70cde2b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wa7sa34cx/rust-kladov
[INFO] finished tweaking git repo https://github.com/wa7sa34cx/rust-kladov
[INFO] tweaked toml for git repo https://github.com/wa7sa34cx/rust-kladov written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wa7sa34cx/rust-kladov already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05a6f89e25c78a052172c8686959cba6ef735683ca50a7016abd7416afdedab4
[INFO] running `Command { std: "docker" "start" "-a" "05a6f89e25c78a052172c8686959cba6ef735683ca50a7016abd7416afdedab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05a6f89e25c78a052172c8686959cba6ef735683ca50a7016abd7416afdedab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05a6f89e25c78a052172c8686959cba6ef735683ca50a7016abd7416afdedab4", kill_on_drop: false }`
[INFO] [stdout] 05a6f89e25c78a052172c8686959cba6ef735683ca50a7016abd7416afdedab4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dreturn-local-variable-ptr" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+6db1a6a7ebb2ad243051f3ff949f987dd70cde2b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6eb42ec4492fedd290898908467a3fc995eb7ee2df27ac8ef15cf753b75ac7d
[INFO] running `Command { std: "docker" "start" "-a" "c6eb42ec4492fedd290898908467a3fc995eb7ee2df27ac8ef15cf753b75ac7d", kill_on_drop: false }`
[INFO] [stderr]     Checking kladov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let r: &i32;
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_r` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         r = &y; // `y` does not live long enough!!!
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `r` is assigned to, but never used
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let r: &i32;
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_r` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         r = &y; // `y` does not live long enough!!!
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut w = Wrapper {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ch02_lifetime/mod.rs:79:9
[INFO] [stdout]    |
[INFO] [stdout] 79 |     let mut w = Wrapper {
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/ch02_lifetime/mod.rs:193:26
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn f<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/ch02_lifetime/mod.rs:193:26
[INFO] [stdout]     |
[INFO] [stdout] 193 | fn f<'a, 'b>(x: &'a i32, y: &'b i32) -> &'a i32 {
[INFO] [stdout]     |                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "c6eb42ec4492fedd290898908467a3fc995eb7ee2df27ac8ef15cf753b75ac7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6eb42ec4492fedd290898908467a3fc995eb7ee2df27ac8ef15cf753b75ac7d", kill_on_drop: false }`
[INFO] [stdout] c6eb42ec4492fedd290898908467a3fc995eb7ee2df27ac8ef15cf753b75ac7d