[INFO] fetching crate frankencell 0.2.0...
[INFO] testing frankencell-0.2.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate frankencell 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate frankencell 0.2.0
[INFO] finished tweaking crates.io crate frankencell 0.2.0
[INFO] tweaked toml for crates.io crate frankencell 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate frankencell 0.2.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate frankencell 0.2.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1441988861fce74229f8ac3d0113674a19ed6fce31b15f51a12876ff35a5e9ed
[INFO] running `Command { std: "docker" "start" "-a" "1441988861fce74229f8ac3d0113674a19ed6fce31b15f51a12876ff35a5e9ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1441988861fce74229f8ac3d0113674a19ed6fce31b15f51a12876ff35a5e9ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1441988861fce74229f8ac3d0113674a19ed6fce31b15f51a12876ff35a5e9ed", kill_on_drop: false }`
[INFO] [stdout] 1441988861fce74229f8ac3d0113674a19ed6fce31b15f51a12876ff35a5e9ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] c44357faddc2af9acf884679b72ef7573b27e6a0b97da1f21237fb1201d72cf4
[INFO] running `Command { std: "docker" "start" "-a" "c44357faddc2af9acf884679b72ef7573b27e6a0b97da1f21237fb1201d72cf4", kill_on_drop: false }`
[INFO] [stderr]    Compiling frankencell v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "c44357faddc2af9acf884679b72ef7573b27e6a0b97da1f21237fb1201d72cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c44357faddc2af9acf884679b72ef7573b27e6a0b97da1f21237fb1201d72cf4", kill_on_drop: false }`
[INFO] [stdout] c44357faddc2af9acf884679b72ef7573b27e6a0b97da1f21237fb1201d72cf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] bb18e9c2d47b1a22121e1e346cc05d3905b54bff8237fc3e7b21b997919c23c5
[INFO] running `Command { std: "docker" "start" "-a" "bb18e9c2d47b1a22121e1e346cc05d3905b54bff8237fc3e7b21b997919c23c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling frankencell v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> examples/arena.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     drop(b);
[INFO] [stdout]    |     ^^^^^-^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `&char`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 88 -     drop(b);
[INFO] [stdout] 88 +     let _ = b;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> examples/arena.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     drop(a);
[INFO] [stdout]    |     ^^^^^-^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          argument has type `&mut char`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 89 -     drop(a);
[INFO] [stdout] 89 +     let _ = a;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "bb18e9c2d47b1a22121e1e346cc05d3905b54bff8237fc3e7b21b997919c23c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb18e9c2d47b1a22121e1e346cc05d3905b54bff8237fc3e7b21b997919c23c5", kill_on_drop: false }`
[INFO] [stdout] bb18e9c2d47b1a22121e1e346cc05d3905b54bff8237fc3e7b21b997919c23c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b7309c18d3caeae9fb274788ad35a382142ea606c4b374da494b8e2f225a9dce
[INFO] running `Command { std: "docker" "start" "-a" "b7309c18d3caeae9fb274788ad35a382142ea606c4b374da494b8e2f225a9dce", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> examples/arena.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     drop(b);
[INFO] [stderr]    |     ^^^^^-^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          argument has type `&char`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 88 -     drop(b);
[INFO] [stderr] 88 +     let _ = b;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> examples/arena.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     drop(a);
[INFO] [stderr]    |     ^^^^^-^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          argument has type `&mut char`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 89 -     drop(a);
[INFO] [stderr] 89 +     let _ = a;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `frankencell` (example "arena") generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/frankencell-7319e72d582c4292)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test init_tokens_test ... ok
[INFO] [stdout] test test_first ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b7309c18d3caeae9fb274788ad35a382142ea606c4b374da494b8e2f225a9dce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7309c18d3caeae9fb274788ad35a382142ea606c4b374da494b8e2f225a9dce", kill_on_drop: false }`
[INFO] [stdout] b7309c18d3caeae9fb274788ad35a382142ea606c4b374da494b8e2f225a9dce