[INFO] fetching crate houdini 1.0.1...
[INFO] testing houdini-1.0.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate houdini 1.0.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate houdini 1.0.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate houdini 1.0.1
[INFO] finished tweaking crates.io crate houdini 1.0.1
[INFO] tweaked toml for crates.io crate houdini 1.0.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7de9889d5f4588356085377d5c7f5397f0ce28794a8b62d05b751795734a8c9d
[INFO] running `Command { std: "docker" "start" "-a" "7de9889d5f4588356085377d5c7f5397f0ce28794a8b62d05b751795734a8c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7de9889d5f4588356085377d5c7f5397f0ce28794a8b62d05b751795734a8c9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7de9889d5f4588356085377d5c7f5397f0ce28794a8b62d05b751795734a8c9d", kill_on_drop: false }`
[INFO] [stdout] 7de9889d5f4588356085377d5c7f5397f0ce28794a8b62d05b751795734a8c9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d44bf48362f675c4e079d972910895d5c2a0f57703ce836ec9765026b2ad9f8
[INFO] running `Command { std: "docker" "start" "-a" "7d44bf48362f675c4e079d972910895d5c2a0f57703ce836ec9765026b2ad9f8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling houdini v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |         return disappear_impl();
[INFO] [stdout]    |         ----------------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 55 |     Err(HoudiniError::UnsupportedPlatform)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "7d44bf48362f675c4e079d972910895d5c2a0f57703ce836ec9765026b2ad9f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d44bf48362f675c4e079d972910895d5c2a0f57703ce836ec9765026b2ad9f8", kill_on_drop: false }`
[INFO] [stdout] 7d44bf48362f675c4e079d972910895d5c2a0f57703ce836ec9765026b2ad9f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 179625e6d82545d54664dc29aacb73c6259f7eb3d4fb71acf557d3a37bb3cdc5
[INFO] running `Command { std: "docker" "start" "-a" "179625e6d82545d54664dc29aacb73c6259f7eb3d4fb71acf557d3a37bb3cdc5", kill_on_drop: false }`
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |         return disappear_impl();
[INFO] [stdout]    |         ----------------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 55 |     Err(HoudiniError::UnsupportedPlatform)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling houdini v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |         return disappear_impl();
[INFO] [stdout]    |         ----------------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 55 |     Err(HoudiniError::UnsupportedPlatform)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "179625e6d82545d54664dc29aacb73c6259f7eb3d4fb71acf557d3a37bb3cdc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "179625e6d82545d54664dc29aacb73c6259f7eb3d4fb71acf557d3a37bb3cdc5", kill_on_drop: false }`
[INFO] [stdout] 179625e6d82545d54664dc29aacb73c6259f7eb3d4fb71acf557d3a37bb3cdc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 776a3102cfe5527c0ad279ecdf92bfb020e07505ea8139674ea59fa4647c43b2
[INFO] running `Command { std: "docker" "start" "-a" "776a3102cfe5527c0ad279ecdf92bfb020e07505ea8139674ea59fa4647c43b2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 52 |         return disappear_impl();
[INFO] [stderr]    |         ----------------------- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 55 |     Err(HoudiniError::UnsupportedPlatform)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `houdini` (lib) generated 1 warning
[INFO] [stderr] warning: `houdini` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/houdini-b56f8bbb69f654bf)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests houdini
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - disappear (line 38) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.40s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "776a3102cfe5527c0ad279ecdf92bfb020e07505ea8139674ea59fa4647c43b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "776a3102cfe5527c0ad279ecdf92bfb020e07505ea8139674ea59fa4647c43b2", kill_on_drop: false }`
[INFO] [stdout] 776a3102cfe5527c0ad279ecdf92bfb020e07505ea8139674ea59fa4647c43b2