[INFO] updating cached repository FilipNordmark/Math
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FilipNordmark/Math
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FilipNordmark/Math" "work/ex/beta-1.37-6/sources/1.36.0/gh/FilipNordmark/Math"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/FilipNordmark/Math'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FilipNordmark/Math" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FilipNordmark/Math"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FilipNordmark/Math'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 62ec5789ce38955e6cd4381b6b4119960e180637
[INFO] sha for GitHub repo FilipNordmark/Math: 62ec5789ce38955e6cd4381b6b4119960e180637
[INFO] validating manifest of FilipNordmark/Math 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 FilipNordmark/Math 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 FilipNordmark/Math
[INFO] finished frobbing FilipNordmark/Math
[INFO] frobbed toml for FilipNordmark/Math written to work/ex/beta-1.37-6/sources/1.36.0/gh/FilipNordmark/Math/Cargo.toml
[INFO] started frobbing FilipNordmark/Math
[INFO] finished frobbing FilipNordmark/Math
[INFO] frobbed toml for FilipNordmark/Math written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/FilipNordmark/Math/Cargo.toml
[INFO] crate FilipNordmark/Math 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing FilipNordmark/Math 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-3/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/FilipNordmark/Math:/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] 8cb2aff0b47c2bb31da5f7c8a40511c01ff89ef872e032233dd503d9b3980f5d
[INFO] running `"docker" "start" "-a" "8cb2aff0b47c2bb31da5f7c8a40511c01ff89ef872e032233dd503d9b3980f5d"`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/lib.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn to_expr( input: String ) -> Result<Expr<'a>, &'static str> {
[INFO] [stderr]    |                     ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `"docker" "inspect" "8cb2aff0b47c2bb31da5f7c8a40511c01ff89ef872e032233dd503d9b3980f5d"`
[INFO] running `"docker" "rm" "-f" "8cb2aff0b47c2bb31da5f7c8a40511c01ff89ef872e032233dd503d9b3980f5d"`
[INFO] [stdout] 8cb2aff0b47c2bb31da5f7c8a40511c01ff89ef872e032233dd503d9b3980f5d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/FilipNordmark/Math:/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] 9f6da2f40eb25566d2cb681e4ff38e10d60337b6f46a7210ab361d45c328894d
[INFO] running `"docker" "start" "-a" "9f6da2f40eb25566d2cb681e4ff38e10d60337b6f46a7210ab361d45c328894d"`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `input`
[INFO] [stderr]   --> src/lib.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn to_expr( input: String ) -> Result<Expr<'a>, &'static str> {
[INFO] [stderr]    |                     ^^^^^ help: consider prefixing with an underscore: `_input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "9f6da2f40eb25566d2cb681e4ff38e10d60337b6f46a7210ab361d45c328894d"`
[INFO] running `"docker" "rm" "-f" "9f6da2f40eb25566d2cb681e4ff38e10d60337b6f46a7210ab361d45c328894d"`
[INFO] [stdout] 9f6da2f40eb25566d2cb681e4ff38e10d60337b6f46a7210ab361d45c328894d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/FilipNordmark/Math:/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] b2309aad2f4bcc3f0b81acb07afc60234aeb1be5ebe03d9bb8991f9fb9c6dc13
[INFO] running `"docker" "start" "-a" "b2309aad2f4bcc3f0b81acb07afc60234aeb1be5ebe03d9bb8991f9fb9c6dc13"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/calculator-36efe33da070fa0d
[INFO] [stderr]      Running /opt/crater/target/debug/deps/calculator-2fa71e884d5d314c
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests calculator
[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] [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] [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" "b2309aad2f4bcc3f0b81acb07afc60234aeb1be5ebe03d9bb8991f9fb9c6dc13"`
[INFO] running `"docker" "rm" "-f" "b2309aad2f4bcc3f0b81acb07afc60234aeb1be5ebe03d9bb8991f9fb9c6dc13"`
[INFO] [stdout] b2309aad2f4bcc3f0b81acb07afc60234aeb1be5ebe03d9bb8991f9fb9c6dc13