[INFO] cloning repository https://github.com/tkkcc/libloading_catch_unwind_test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tkkcc/libloading_catch_unwind_test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkkcc%2Flibloading_catch_unwind_test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkkcc%2Flibloading_catch_unwind_test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aaf9814eef8820211e3bf781c81adc6e7d957269
[INFO] checking tkkcc/libloading_catch_unwind_test against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkkcc%2Flibloading_catch_unwind_test" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tkkcc/libloading_catch_unwind_test
[INFO] finished tweaking git repo https://github.com/tkkcc/libloading_catch_unwind_test
[INFO] tweaked toml for git repo https://github.com/tkkcc/libloading_catch_unwind_test written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tkkcc/libloading_catch_unwind_test on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tkkcc/libloading_catch_unwind_test 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a834916fe0505fa79b475fcc661f42f4361fc692cc0aea7934e40ccc0c4b886
[INFO] running `Command { std: "docker" "start" "-a" "9a834916fe0505fa79b475fcc661f42f4361fc692cc0aea7934e40ccc0c4b886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a834916fe0505fa79b475fcc661f42f4361fc692cc0aea7934e40ccc0c4b886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a834916fe0505fa79b475fcc661f42f4361fc692cc0aea7934e40ccc0c4b886", kill_on_drop: false }`
[INFO] [stdout] 9a834916fe0505fa79b475fcc661f42f4361fc692cc0aea7934e40ccc0c4b886
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be6f57a93b636f45efdc3ca6e36aa178d3739d1922743f4132ba788d5126886d
[INFO] running `Command { std: "docker" "start" "-a" "be6f57a93b636f45efdc3ca6e36aa178d3739d1922743f4132ba788d5126886d", kill_on_drop: false }`
[INFO] [stderr]     Checking libloading v0.8.5
[INFO] [stderr]     Checking plugin v0.1.0 (/opt/rustwide/workdir/plugin)
[INFO] [stderr]     Checking host v0.1.0 (/opt/rustwide/workdir/host)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> host/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | /         std::panic::catch_unwind(|| {
[INFO] [stdout] 7 | |             func();
[INFO] [stdout] 8 | |         });
[INFO] [stdout]   | |__________^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let _ = std::panic::catch_unwind(|| {
[INFO] [stdout]   |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> host/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | /         std::panic::catch_unwind(|| {
[INFO] [stdout] 7 | |             func();
[INFO] [stdout] 8 | |         });
[INFO] [stdout]   | |__________^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let _ = std::panic::catch_unwind(|| {
[INFO] [stdout]   |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "be6f57a93b636f45efdc3ca6e36aa178d3739d1922743f4132ba788d5126886d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be6f57a93b636f45efdc3ca6e36aa178d3739d1922743f4132ba788d5126886d", kill_on_drop: false }`
[INFO] [stdout] be6f57a93b636f45efdc3ca6e36aa178d3739d1922743f4132ba788d5126886d