[INFO] updating cached repository fyrchik/ebola
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fyrchik/ebola
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fyrchik/ebola" "work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fyrchik/ebola" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fyrchik/ebola"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fyrchik/ebola'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7f682f9305f0900b7f72bebda0ce02459a023f61
[INFO] sha for GitHub repo fyrchik/ebola: 7f682f9305f0900b7f72bebda0ce02459a023f61
[INFO] validating manifest of fyrchik/ebola 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 fyrchik/ebola 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 fyrchik/ebola
[INFO] finished frobbing fyrchik/ebola
[INFO] frobbed toml for fyrchik/ebola written to work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola/Cargo.toml
[INFO] started frobbing fyrchik/ebola
[INFO] finished frobbing fyrchik/ebola
[INFO] frobbed toml for fyrchik/ebola written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fyrchik/ebola/Cargo.toml
[INFO] crate fyrchik/ebola 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 fyrchik/ebola 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola:/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] 0f75e858cccb76582b2d7ff16d021fc4b9ad57558813b834d07567d0c6f2d492
[INFO] running `"docker" "start" "-a" "0f75e858cccb76582b2d7ff16d021fc4b9ad57558813b834d07567d0c6f2d492"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ebola v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `t` is never read
[INFO] [stderr]    --> src/main.rs:108:13
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let mut t = 0;
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:66:13
[INFO] [stderr]     |
[INFO] [stderr] 66  |         let mut t = $f(&a1, &a2);
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 113 |     compose12!(t, sum, sum, sum2, 2 3);
[INFO] [stderr]     |     ----------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.95s
[INFO] running `"docker" "inspect" "0f75e858cccb76582b2d7ff16d021fc4b9ad57558813b834d07567d0c6f2d492"`
[INFO] running `"docker" "rm" "-f" "0f75e858cccb76582b2d7ff16d021fc4b9ad57558813b834d07567d0c6f2d492"`
[INFO] [stdout] 0f75e858cccb76582b2d7ff16d021fc4b9ad57558813b834d07567d0c6f2d492
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola:/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] 90c52af39159a57e92f426900e108f0fa1179c29ec9bd43057c4433627f1cdb3
[INFO] running `"docker" "start" "-a" "90c52af39159a57e92f426900e108f0fa1179c29ec9bd43057c4433627f1cdb3"`
[INFO] [stderr]    Compiling ebola v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `t` is never read
[INFO] [stderr]    --> src/main.rs:108:13
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let mut t = 0;
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:66:13
[INFO] [stderr]     |
[INFO] [stderr] 66  |         let mut t = $f(&a1, &a2);
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 113 |     compose12!(t, sum, sum, sum2, 2 3);
[INFO] [stderr]     |     ----------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "90c52af39159a57e92f426900e108f0fa1179c29ec9bd43057c4433627f1cdb3"`
[INFO] running `"docker" "rm" "-f" "90c52af39159a57e92f426900e108f0fa1179c29ec9bd43057c4433627f1cdb3"`
[INFO] [stdout] 90c52af39159a57e92f426900e108f0fa1179c29ec9bd43057c4433627f1cdb3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fyrchik/ebola:/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] 4aa9d7692ce05dd10344c734da20ded8833829aa8250a316ee903ec0cb50e478
[INFO] running `"docker" "start" "-a" "4aa9d7692ce05dd10344c734da20ded8833829aa8250a316ee903ec0cb50e478"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/ebola-fef8772d842d350f
[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" "4aa9d7692ce05dd10344c734da20ded8833829aa8250a316ee903ec0cb50e478"`
[INFO] running `"docker" "rm" "-f" "4aa9d7692ce05dd10344c734da20ded8833829aa8250a316ee903ec0cb50e478"`
[INFO] [stdout] 4aa9d7692ce05dd10344c734da20ded8833829aa8250a316ee903ec0cb50e478