[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-1.38-1/sources/1.37.0/gh/flavray/avro-rs-ffi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/flavray/avro-rs-ffi'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/flavray/avro-rs-ffi" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/flavray/avro-rs-ffi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of flavray/avro-rs-ffi 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 flavray/avro-rs-ffi
[INFO] finished frobbing flavray/avro-rs-ffi
[INFO] frobbed toml for flavray/avro-rs-ffi written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "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 flavray/avro-rs-ffi 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/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 0efbc84e86a3e847492ba081072899ed5a9908cb847f143395cde5945ba41af9
[INFO] running `"docker" "start" "-a" "0efbc84e86a3e847492ba081072899ed5a9908cb847f143395cde5945ba41af9"`
[INFO] [stderr]    Compiling iter-read v0.1.0
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling libflate v0.1.15
[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 37.81s
[INFO] running `"docker" "inspect" "0efbc84e86a3e847492ba081072899ed5a9908cb847f143395cde5945ba41af9"`
[INFO] running `"docker" "rm" "-f" "0efbc84e86a3e847492ba081072899ed5a9908cb847f143395cde5945ba41af9"`
[INFO] [stdout] 0efbc84e86a3e847492ba081072899ed5a9908cb847f143395cde5945ba41af9
[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/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9b357ddab5aa7e26cac9e00450146f5a0bb16ca7af5c4ee4436d590f788e9960
[INFO] running `"docker" "start" "-a" "9b357ddab5aa7e26cac9e00450146f5a0bb16ca7af5c4ee4436d590f788e9960"`
[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 4.98s
[INFO] running `"docker" "inspect" "9b357ddab5aa7e26cac9e00450146f5a0bb16ca7af5c4ee4436d590f788e9960"`
[INFO] running `"docker" "rm" "-f" "9b357ddab5aa7e26cac9e00450146f5a0bb16ca7af5c4ee4436d590f788e9960"`
[INFO] [stdout] 9b357ddab5aa7e26cac9e00450146f5a0bb16ca7af5c4ee4436d590f788e9960
[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/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] b68d479a3ed5b2149dbf168f73bd61775a989837a7773d3d2b75efecd7b0abbf
[INFO] running `"docker" "start" "-a" "b68d479a3ed5b2149dbf168f73bd61775a989837a7773d3d2b75efecd7b0abbf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/avro_rs_ffi-bb736eb4ef036c2e
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test avro_utils::tests::pickle_record ... ok
[INFO] [stdout] test avro_utils::tests::pickle_int ... 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" "b68d479a3ed5b2149dbf168f73bd61775a989837a7773d3d2b75efecd7b0abbf"`
[INFO] running `"docker" "rm" "-f" "b68d479a3ed5b2149dbf168f73bd61775a989837a7773d3d2b75efecd7b0abbf"`
[INFO] [stdout] b68d479a3ed5b2149dbf168f73bd61775a989837a7773d3d2b75efecd7b0abbf