[INFO] fetching crate plugin_manager_lib 0.1.3...
[INFO] testing plugin_manager_lib-0.1.3 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate plugin_manager_lib 0.1.3 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate plugin_manager_lib 0.1.3
[INFO] finished tweaking crates.io crate plugin_manager_lib 0.1.3
[INFO] tweaked toml for crates.io crate plugin_manager_lib 0.1.3 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate plugin_manager_lib 0.1.3 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libloader v0.1.4
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c96745fa672fefb69df3457c65fa3bfe1ef82e8e9ea3ad22bf28159008e016c
[INFO] running `Command { std: "docker" "start" "-a" "1c96745fa672fefb69df3457c65fa3bfe1ef82e8e9ea3ad22bf28159008e016c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c96745fa672fefb69df3457c65fa3bfe1ef82e8e9ea3ad22bf28159008e016c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c96745fa672fefb69df3457c65fa3bfe1ef82e8e9ea3ad22bf28159008e016c", kill_on_drop: false }`
[INFO] [stdout] 1c96745fa672fefb69df3457c65fa3bfe1ef82e8e9ea3ad22bf28159008e016c
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20aa73b22ad0879025e22e18801628123c3c29a3b6e2f7039a1f6a789eee5268
[INFO] running `Command { std: "docker" "start" "-a" "20aa73b22ad0879025e22e18801628123c3c29a3b6e2f7039a1f6a789eee5268", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling libloader v0.1.4
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling plugin_manager_lib v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.50s
[INFO] running `Command { std: "docker" "inspect" "20aa73b22ad0879025e22e18801628123c3c29a3b6e2f7039a1f6a789eee5268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20aa73b22ad0879025e22e18801628123c3c29a3b6e2f7039a1f6a789eee5268", kill_on_drop: false }`
[INFO] [stdout] 20aa73b22ad0879025e22e18801628123c3c29a3b6e2f7039a1f6a789eee5268
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92beaed3e40e32e7ae88e4194dd402652dbe18cc40127001540854128f2f2ef9
[INFO] running `Command { std: "docker" "start" "-a" "92beaed3e40e32e7ae88e4194dd402652dbe18cc40127001540854128f2f2ef9", kill_on_drop: false }`
[INFO] [stderr]    Compiling plugin_manager_lib v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]    --> src/lib.rs:172:15
[INFO] [stdout]     |
[INFO] [stdout] 172 |         Some((name, plugin)) => {
[INFO] [stdout]     |               ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:169:14
[INFO] [stdout]     |
[INFO] [stdout] 169 |     unsafe { plugin_manager.load_extend("libplugin.so") };
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 169 |     unsafe { let _ = plugin_manager.load_extend("libplugin.so"); };
[INFO] [stdout]     |              +++++++                                           +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "92beaed3e40e32e7ae88e4194dd402652dbe18cc40127001540854128f2f2ef9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92beaed3e40e32e7ae88e4194dd402652dbe18cc40127001540854128f2f2ef9", kill_on_drop: false }`
[INFO] [stdout] 92beaed3e40e32e7ae88e4194dd402652dbe18cc40127001540854128f2f2ef9
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 92478ec343f23d6ba41cdb03f35ebb4b35f017ea28131a64f37f72f8e1c2e2e6
[INFO] running `Command { std: "docker" "start" "-a" "92478ec343f23d6ba41cdb03f35ebb4b35f017ea28131a64f37f72f8e1c2e2e6", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stdout] 
[INFO] [stderr]    --> src/lib.rs:172:15
[INFO] [stdout] running 1 test
[INFO] [stderr]     |
[INFO] [stderr] 172 |         Some((name, plugin)) => {
[INFO] [stderr]     |               ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:169:14
[INFO] [stderr]     |
[INFO] [stderr] 169 |     unsafe { plugin_manager.load_extend("libplugin.so") };
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 169 |     unsafe { let _ = plugin_manager.load_extend("libplugin.so"); };
[INFO] [stderr]     |              +++++++                                           +
[INFO] [stderr] 
[INFO] [stderr] warning: `plugin_manager_lib` (lib test) generated 2 warnings (run `cargo fix --lib -p plugin_manager_lib --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/plugin_manager_lib-98d0ba24f93fc864)
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/plugin_manager_lib-98d0ba24f93fc864` (signal: 11, SIGSEGV: invalid memory reference)
[INFO] running `Command { std: "docker" "inspect" "92478ec343f23d6ba41cdb03f35ebb4b35f017ea28131a64f37f72f8e1c2e2e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92478ec343f23d6ba41cdb03f35ebb4b35f017ea28131a64f37f72f8e1c2e2e6", kill_on_drop: false }`
[INFO] [stdout] 92478ec343f23d6ba41cdb03f35ebb4b35f017ea28131a64f37f72f8e1c2e2e6