[INFO] updating cached repository mozilla/ffi-toolkit
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mozilla/ffi-toolkit
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mozilla/ffi-toolkit" "work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mozilla/ffi-toolkit" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mozilla/ffi-toolkit"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mozilla/ffi-toolkit'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 344e10996e2cca9a6ad443f7b1bcd47688c1e05d
[INFO] sha for GitHub repo mozilla/ffi-toolkit: 344e10996e2cca9a6ad443f7b1bcd47688c1e05d
[INFO] validating manifest of mozilla/ffi-toolkit on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mozilla/ffi-toolkit on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mozilla/ffi-toolkit
[INFO] finished frobbing mozilla/ffi-toolkit
[INFO] frobbed toml for mozilla/ffi-toolkit written to work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit/Cargo.toml
[INFO] started frobbing mozilla/ffi-toolkit
[INFO] finished frobbing mozilla/ffi-toolkit
[INFO] frobbed toml for mozilla/ffi-toolkit written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mozilla/ffi-toolkit/Cargo.toml
[INFO] crate mozilla/ffi-toolkit already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mozilla/ffi-toolkit against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4cb0a6e1038bef6c83ad7af484febb889f889525217bf01bd2af944a75e69082
[INFO] running `"docker" "start" "-a" "4cb0a6e1038bef6c83ad7af484febb889f889525217bf01bd2af944a75e69082"`
[INFO] [stderr]    Compiling ffi-toolkit v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/memory.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// destroy function for releasing the memory for boxed `repr(C)` structs.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 42 | define_destructor!(destroy, c_void);
[INFO] [stderr]    | ------------------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "4cb0a6e1038bef6c83ad7af484febb889f889525217bf01bd2af944a75e69082"`
[INFO] running `"docker" "rm" "-f" "4cb0a6e1038bef6c83ad7af484febb889f889525217bf01bd2af944a75e69082"`
[INFO] [stdout] 4cb0a6e1038bef6c83ad7af484febb889f889525217bf01bd2af944a75e69082
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4f6db554b7edfb0c6730af232f45b850168df9c5c2ecd820c213987bdee3ae6e
[INFO] running `"docker" "start" "-a" "4f6db554b7edfb0c6730af232f45b850168df9c5c2ecd820c213987bdee3ae6e"`
[INFO] [stderr]    Compiling ffi-toolkit v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/memory.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// destroy function for releasing the memory for boxed `repr(C)` structs.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 42 | define_destructor!(destroy, c_void);
[INFO] [stderr]    | ------------------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "4f6db554b7edfb0c6730af232f45b850168df9c5c2ecd820c213987bdee3ae6e"`
[INFO] running `"docker" "rm" "-f" "4f6db554b7edfb0c6730af232f45b850168df9c5c2ecd820c213987bdee3ae6e"`
[INFO] [stdout] 4f6db554b7edfb0c6730af232f45b850168df9c5c2ecd820c213987bdee3ae6e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/mozilla/ffi-toolkit:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] d13ecd69f1000acc31292dd9ddcf7c3575c6aca465dd4664cd72db83c00fc6cd
[INFO] running `"docker" "start" "-a" "d13ecd69f1000acc31292dd9ddcf7c3575c6aca465dd4664cd72db83c00fc6cd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ffi_toolkit-c7609dd98d277f52
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ffi-toolkit
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d13ecd69f1000acc31292dd9ddcf7c3575c6aca465dd4664cd72db83c00fc6cd"`
[INFO] running `"docker" "rm" "-f" "d13ecd69f1000acc31292dd9ddcf7c3575c6aca465dd4664cd72db83c00fc6cd"`
[INFO] [stdout] d13ecd69f1000acc31292dd9ddcf7c3575c6aca465dd4664cd72db83c00fc6cd