[INFO] updating cached repository lann/wasm-idl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lann/wasm-idl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lann/wasm-idl" "work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lann/wasm-idl" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lann/wasm-idl"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lann/wasm-idl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fb474475ca89130af5f96e247407eb6a21c64947
[INFO] sha for GitHub repo lann/wasm-idl: fb474475ca89130af5f96e247407eb6a21c64947
[INFO] validating manifest of lann/wasm-idl 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 lann/wasm-idl 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 lann/wasm-idl
[INFO] finished frobbing lann/wasm-idl
[INFO] frobbed toml for lann/wasm-idl written to work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl/Cargo.toml
[INFO] started frobbing lann/wasm-idl
[INFO] finished frobbing lann/wasm-idl
[INFO] frobbed toml for lann/wasm-idl written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lann/wasm-idl/Cargo.toml
[INFO] crate lann/wasm-idl 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 lann/wasm-idl 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl:/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] f3c76920e484d8dd905db0917df3a1fa2d3e9cc847533fef1e7885cda05529fc
[INFO] running `"docker" "start" "-a" "f3c76920e484d8dd905db0917df3a1fa2d3e9cc847533fef1e7885cda05529fc"`
[INFO] [stderr]    Compiling syn v0.15.36
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling pest v2.1.1
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling wasm-idl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `builtin_types`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let builtin_types = builtins::parse_types();
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_builtin_types`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.84s
[INFO] running `"docker" "inspect" "f3c76920e484d8dd905db0917df3a1fa2d3e9cc847533fef1e7885cda05529fc"`
[INFO] running `"docker" "rm" "-f" "f3c76920e484d8dd905db0917df3a1fa2d3e9cc847533fef1e7885cda05529fc"`
[INFO] [stdout] f3c76920e484d8dd905db0917df3a1fa2d3e9cc847533fef1e7885cda05529fc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl:/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] 1bdd278d4c96b77d0a54c463b1a7562d05ce1703d06f0da99be207bc98a7dc42
[INFO] running `"docker" "start" "-a" "1bdd278d4c96b77d0a54c463b1a7562d05ce1703d06f0da99be207bc98a7dc42"`
[INFO] [stderr]    Compiling wasm-idl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `builtin_types`
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let builtin_types = builtins::parse_types();
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_builtin_types`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "1bdd278d4c96b77d0a54c463b1a7562d05ce1703d06f0da99be207bc98a7dc42"`
[INFO] running `"docker" "rm" "-f" "1bdd278d4c96b77d0a54c463b1a7562d05ce1703d06f0da99be207bc98a7dc42"`
[INFO] [stdout] 1bdd278d4c96b77d0a54c463b1a7562d05ce1703d06f0da99be207bc98a7dc42
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lann/wasm-idl:/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] 831365d15e0720df1e096e476bf9176d80c1d09c2fe16bc5ff9279275e55a550
[INFO] running `"docker" "start" "-a" "831365d15e0720df1e096e476bf9176d80c1d09c2fe16bc5ff9279275e55a550"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/wasm_idl-993acfa1bd6eaf46
[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" "831365d15e0720df1e096e476bf9176d80c1d09c2fe16bc5ff9279275e55a550"`
[INFO] running `"docker" "rm" "-f" "831365d15e0720df1e096e476bf9176d80c1d09c2fe16bc5ff9279275e55a550"`
[INFO] [stdout] 831365d15e0720df1e096e476bf9176d80c1d09c2fe16bc5ff9279275e55a550