[INFO] fetching crate fehler 1.0.0...
[INFO] checking fehler-1.0.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate fehler 1.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate fehler 1.0.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fehler 1.0.0
[INFO] finished tweaking crates.io crate fehler 1.0.0
[INFO] tweaked toml for crates.io crate fehler 1.0.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate fehler 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", 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] 610d10c0d41ffaa0aec31b9bfecb9369e0e2f8ac322eb59e0ec90d5c41c76e2e
[INFO] running `Command { std: "docker" "start" "-a" "610d10c0d41ffaa0aec31b9bfecb9369e0e2f8ac322eb59e0ec90d5c41c76e2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "610d10c0d41ffaa0aec31b9bfecb9369e0e2f8ac322eb59e0ec90d5c41c76e2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "610d10c0d41ffaa0aec31b9bfecb9369e0e2f8ac322eb59e0ec90d5c41c76e2e", kill_on_drop: false }`
[INFO] [stdout] 610d10c0d41ffaa0aec31b9bfecb9369e0e2f8ac322eb59e0ec90d5c41c76e2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] 19e834c972cb8cebdfdb427a00053e0ad9b4a2a09ec0bc9eb85e210aa462d172
[INFO] running `Command { std: "docker" "start" "-a" "19e834c972cb8cebdfdb427a00053e0ad9b4a2a09ec0bc9eb85e210aa462d172", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling fehler-macros v1.0.0
[INFO] [stderr]     Checking fehler v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]  --> tests/no_std.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[throws(i32)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 6 | fn no_std_fn() {
[INFO] [stdout] 7 |     throw!(0);
[INFO] [stdout]   |     ---------- any code following this expression is unreachable
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]   = note: this warning originates in the attribute macro `throws` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> tests/throws.rs:99:5
[INFO] [stdout]     |
[INFO] [stdout] 99  |     #[throws]
[INFO] [stdout]     |     ^^^^^^^^^ unreachable expression
[INFO] [stdout] 100 |     fn throws_integer() {
[INFO] [stdout] 101 |         throw!(0);
[INFO] [stdout]     |         ---------- any code following this expression is unreachable
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the attribute macro `throws` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Error`
[INFO] [stdout]   --> tests/throws.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     type Error = 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: `throws_integer`
[INFO] [stdout]    --> tests/throws.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn throws_integer() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.37s
[INFO] running `Command { std: "docker" "inspect" "19e834c972cb8cebdfdb427a00053e0ad9b4a2a09ec0bc9eb85e210aa462d172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19e834c972cb8cebdfdb427a00053e0ad9b4a2a09ec0bc9eb85e210aa462d172", kill_on_drop: false }`
[INFO] [stdout] 19e834c972cb8cebdfdb427a00053e0ad9b4a2a09ec0bc9eb85e210aa462d172