[INFO] fetching crate fehler 1.0.0...
[INFO] checking fehler-1.0.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate fehler 1.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate fehler 1.0.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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-4-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fehler-macros v1.0.0
[INFO] [stderr]   Downloaded unicode-xid v0.2.0
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded syn v1.0.17
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03c2c712530d070d33ed35194f224b109321882ddb69b5ad708d23f3dd9c83bc
[INFO] running `Command { std: "docker" "start" "-a" "03c2c712530d070d33ed35194f224b109321882ddb69b5ad708d23f3dd9c83bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03c2c712530d070d33ed35194f224b109321882ddb69b5ad708d23f3dd9c83bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03c2c712530d070d33ed35194f224b109321882ddb69b5ad708d23f3dd9c83bc", kill_on_drop: false }`
[INFO] [stdout] 03c2c712530d070d33ed35194f224b109321882ddb69b5ad708d23f3dd9c83bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4338bb75f81fb827b88b6fdd75067c93bbe011e296c2e4f9827593310f12a6d7
[INFO] running `Command { std: "docker" "start" "-a" "4338bb75f81fb827b88b6fdd75067c93bbe011e296c2e4f9827593310f12a6d7", 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/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 `Error` is never used
[INFO] [stdout]   --> tests/throws.rs:97:10
[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 `throws_integer` is never used
[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] [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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.42s
[INFO] running `Command { std: "docker" "inspect" "4338bb75f81fb827b88b6fdd75067c93bbe011e296c2e4f9827593310f12a6d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4338bb75f81fb827b88b6fdd75067c93bbe011e296c2e4f9827593310f12a6d7", kill_on_drop: false }`
[INFO] [stdout] 4338bb75f81fb827b88b6fdd75067c93bbe011e296c2e4f9827593310f12a6d7