[INFO] crate convert 0.2.0 is already in cache
[INFO] extracting crate convert 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/convert/0.2.0
[INFO] extracting crate convert 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/convert/0.2.0
[INFO] validating manifest of convert-0.2.0 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 convert-0.2.0 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 convert-0.2.0
[INFO] finished frobbing convert-0.2.0
[INFO] frobbed toml for convert-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/convert/0.2.0/Cargo.toml
[INFO] started frobbing convert-0.2.0
[INFO] finished frobbing convert-0.2.0
[INFO] frobbed toml for convert-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/convert/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 convert-0.2.0 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/convert/0.2.0:/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] 6c1607a1779cec59511ee55c144113c2abe513a29b0f9d104a6f139e2ac2c97f
[INFO] running `"docker" "start" "-a" "6c1607a1779cec59511ee55c144113c2abe513a29b0f9d104a6f139e2ac2c97f"`
[INFO] [stderr]    Compiling curl-sys v0.1.35
[INFO] [stderr]    Compiling serde v0.6.15
[INFO] [stderr]    Compiling serde_json v0.6.1
[INFO] [stderr]    Compiling curl v0.2.19
[INFO] [stderr]    Compiling convert v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `json::parse`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use json::parse;
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'failure::Error::causes': please use the 'iter_chain()' method instead
[INFO] [stderr]   --> src/main.rs:40:26
[INFO] [stderr]    |
[INFO] [stderr] 40 |         for cause in err.causes().skip(1) {
[INFO] [stderr]    |                          ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]   --> src/main.rs:90:20
[INFO] [stderr]    |
[INFO] [stderr] 90 |         for (curr, val) in obj.iter() {
[INFO] [stderr]    |                    ^^^ help: consider prefixing with an underscore: `_val`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_attributes)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 26s
[INFO] running `"docker" "inspect" "6c1607a1779cec59511ee55c144113c2abe513a29b0f9d104a6f139e2ac2c97f"`
[INFO] running `"docker" "rm" "-f" "6c1607a1779cec59511ee55c144113c2abe513a29b0f9d104a6f139e2ac2c97f"`
[INFO] [stdout] 6c1607a1779cec59511ee55c144113c2abe513a29b0f9d104a6f139e2ac2c97f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/convert/0.2.0:/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] ebadd32aff1994342ef23653ce9a9a3b4c59e590173e481b5feec5b51427d5f1
[INFO] running `"docker" "start" "-a" "ebadd32aff1994342ef23653ce9a9a3b4c59e590173e481b5feec5b51427d5f1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `"docker" "inspect" "ebadd32aff1994342ef23653ce9a9a3b4c59e590173e481b5feec5b51427d5f1"`
[INFO] running `"docker" "rm" "-f" "ebadd32aff1994342ef23653ce9a9a3b4c59e590173e481b5feec5b51427d5f1"`
[INFO] [stdout] ebadd32aff1994342ef23653ce9a9a3b4c59e590173e481b5feec5b51427d5f1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/convert/0.2.0:/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] 164f70cea7300e6796f0c90532c2cfba7722d02fe1995d81ae0b7991b995bd63
[INFO] running `"docker" "start" "-a" "164f70cea7300e6796f0c90532c2cfba7722d02fe1995d81ae0b7991b995bd63"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `"docker" "inspect" "164f70cea7300e6796f0c90532c2cfba7722d02fe1995d81ae0b7991b995bd63"`
[INFO] running `"docker" "rm" "-f" "164f70cea7300e6796f0c90532c2cfba7722d02fe1995d81ae0b7991b995bd63"`
[INFO] [stdout] 164f70cea7300e6796f0c90532c2cfba7722d02fe1995d81ae0b7991b995bd63