[INFO] updating cached repository flavray/avro-rs-ffi
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/flavray/avro-rs-ffi
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/flavray/avro-rs-ffi" "work/ex/beta-1.37-6/sources/1.36.0/gh/flavray/avro-rs-ffi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/flavray/avro-rs-ffi'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/flavray/avro-rs-ffi" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c6b9e7278565a5f3ca5e4159fca2a27f75335586
[INFO] sha for GitHub repo flavray/avro-rs-ffi: c6b9e7278565a5f3ca5e4159fca2a27f75335586
[INFO] validating manifest of flavray/avro-rs-ffi on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of flavray/avro-rs-ffi on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing flavray/avro-rs-ffi
[INFO] finished frobbing flavray/avro-rs-ffi
[INFO] frobbed toml for flavray/avro-rs-ffi written to work/ex/beta-1.37-6/sources/1.36.0/gh/flavray/avro-rs-ffi/Cargo.toml
[INFO] started frobbing flavray/avro-rs-ffi
[INFO] finished frobbing flavray/avro-rs-ffi
[INFO] frobbed toml for flavray/avro-rs-ffi written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi/Cargo.toml
[INFO] crate flavray/avro-rs-ffi already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing flavray/avro-rs-ffi against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 41aff03439c105d1d6106ec831e5c94257bde67219b59e36282cb6e3ce2a1b16
[INFO] running `"docker" "start" "-a" "41aff03439c105d1d6106ec831e5c94257bde67219b59e36282cb6e3ce2a1b16"`
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling iter-read v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling libflate v0.1.15
[INFO] [stderr]    Compiling serde_json v1.0.21
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling serde-pickle v0.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling avro-rs v0.4.1
[INFO] [stderr]    Compiling avro-rs-ffi v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core.rs:63:17
[INFO] [stderr]    |
[INFO] [stderr] 63 |             let mut out = format!("stacktrace: {}", error.backtrace()).to_owned();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.64s
[INFO] running `"docker" "inspect" "41aff03439c105d1d6106ec831e5c94257bde67219b59e36282cb6e3ce2a1b16"`
[INFO] running `"docker" "rm" "-f" "41aff03439c105d1d6106ec831e5c94257bde67219b59e36282cb6e3ce2a1b16"`
[INFO] [stdout] 41aff03439c105d1d6106ec831e5c94257bde67219b59e36282cb6e3ce2a1b16
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2130de566e296b92d2c8ac52759a41163c50618e46be92d735d5675900f509cf
[INFO] running `"docker" "start" "-a" "2130de566e296b92d2c8ac52759a41163c50618e46be92d735d5675900f509cf"`
[INFO] [stderr]    Compiling avro-rs-ffi v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/core.rs:63:17
[INFO] [stderr]    |
[INFO] [stderr] 63 |             let mut out = format!("stacktrace: {}", error.backtrace()).to_owned();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `"docker" "inspect" "2130de566e296b92d2c8ac52759a41163c50618e46be92d735d5675900f509cf"`
[INFO] running `"docker" "rm" "-f" "2130de566e296b92d2c8ac52759a41163c50618e46be92d735d5675900f509cf"`
[INFO] [stdout] 2130de566e296b92d2c8ac52759a41163c50618e46be92d735d5675900f509cf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/flavray/avro-rs-ffi:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 46516baece1996c87831e3149073aa73be7a81a4e2a549cf63689db7143a5e79
[INFO] running `"docker" "start" "-a" "46516baece1996c87831e3149073aa73be7a81a4e2a549cf63689db7143a5e79"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/avro_rs_ffi-17563f7757c18bae
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test avro_utils::tests::pickle_int ... ok
[INFO] [stdout] test avro_utils::tests::pickle_record ... ok
[INFO] [stdout] test tests::full_test ... ok
[INFO] [stdout] test tests::full_test2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "46516baece1996c87831e3149073aa73be7a81a4e2a549cf63689db7143a5e79"`
[INFO] running `"docker" "rm" "-f" "46516baece1996c87831e3149073aa73be7a81a4e2a549cf63689db7143a5e79"`
[INFO] [stdout] 46516baece1996c87831e3149073aa73be7a81a4e2a549cf63689db7143a5e79