[INFO] fetching crate const-if 0.1.3...
[INFO] checking const-if-0.1.3 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate const-if 0.1.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate const-if 0.1.3 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-if 0.1.3
[INFO] finished tweaking crates.io crate const-if 0.1.3
[INFO] tweaked toml for crates.io crate const-if 0.1.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 018638700c23e106ed25b594e1bfab613ba3f6676e35e5fce372510b38a733f4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "018638700c23e106ed25b594e1bfab613ba3f6676e35e5fce372510b38a733f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "018638700c23e106ed25b594e1bfab613ba3f6676e35e5fce372510b38a733f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "018638700c23e106ed25b594e1bfab613ba3f6676e35e5fce372510b38a733f4", kill_on_drop: false }`
[INFO] [stdout] 018638700c23e106ed25b594e1bfab613ba3f6676e35e5fce372510b38a733f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2e242f15c42a252301580489ebfb2957527014402330f3256a991f0c5fe4f3d8
[INFO] running `Command { std: "docker" "start" "-a" "2e242f15c42a252301580489ebfb2957527014402330f3256a991f0c5fe4f3d8", kill_on_drop: false }`
[INFO] [stderr]     Checking const-if v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `min`
[INFO] [stdout]   --> src/lib.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 |     const fn min(x: i32, y: i32) -> i32 {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_zero`
[INFO] [stdout]   --> src/lib.rs:41:14
[INFO] [stdout]    |
[INFO] [stdout] 41 |     const fn is_zero(i: i32) -> &'static str {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare_to_42`
[INFO] [stdout]   --> src/lib.rs:48:14
[INFO] [stdout]    |
[INFO] [stdout] 48 |     const fn compare_to_42(i: i32) -> &'static str {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `int_to_str`
[INFO] [stdout]   --> src/lib.rs:56:14
[INFO] [stdout]    |
[INFO] [stdout] 56 |     const fn int_to_str(i: i32) -> &'static str {
[INFO] [stdout]    |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "2e242f15c42a252301580489ebfb2957527014402330f3256a991f0c5fe4f3d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e242f15c42a252301580489ebfb2957527014402330f3256a991f0c5fe4f3d8", kill_on_drop: false }`
[INFO] [stdout] 2e242f15c42a252301580489ebfb2957527014402330f3256a991f0c5fe4f3d8