[INFO] updating cached repository guertinlab/fqdedup
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/guertinlab/fqdedup
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/guertinlab/fqdedup" "work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/guertinlab/fqdedup" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/guertinlab/fqdedup"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/guertinlab/fqdedup'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea20cbff76a2b3eb2d838900c46fc0bafd8fe1ba
[INFO] sha for GitHub repo guertinlab/fqdedup: ea20cbff76a2b3eb2d838900c46fc0bafd8fe1ba
[INFO] validating manifest of guertinlab/fqdedup 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 guertinlab/fqdedup 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 guertinlab/fqdedup
[INFO] finished frobbing guertinlab/fqdedup
[INFO] frobbed toml for guertinlab/fqdedup written to work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup/Cargo.toml
[INFO] started frobbing guertinlab/fqdedup
[INFO] finished frobbing guertinlab/fqdedup
[INFO] frobbed toml for guertinlab/fqdedup written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/guertinlab/fqdedup/Cargo.toml
[INFO] crate guertinlab/fqdedup 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 guertinlab/fqdedup 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup:/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] 038f5815f3a5e8b428184d28c9dd51f4b59b7aefc82ea4a000e088a0a6550b3e
[INFO] running `"docker" "start" "-a" "038f5815f3a5e8b428184d28c9dd51f4b59b7aefc82ea4a000e088a0a6550b3e"`
[INFO] [stderr]    Compiling patricia_tree v0.1.1
[INFO] [stderr]    Compiling serde_derive_internals v0.18.1
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.25
[INFO] [stderr]    Compiling docopt v0.8.1
[INFO] [stderr]    Compiling fqdedup v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:136:21
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 let mut output = File::create(output_filename(&args.arg_filename, args.flag_output)).unwrap();
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:148:17
[INFO] [stderr]     |
[INFO] [stderr] 148 |             let mut output = File::create(output_filename(&args.arg_filename, args.flag_output)).unwrap();
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.38s
[INFO] running `"docker" "inspect" "038f5815f3a5e8b428184d28c9dd51f4b59b7aefc82ea4a000e088a0a6550b3e"`
[INFO] running `"docker" "rm" "-f" "038f5815f3a5e8b428184d28c9dd51f4b59b7aefc82ea4a000e088a0a6550b3e"`
[INFO] [stdout] 038f5815f3a5e8b428184d28c9dd51f4b59b7aefc82ea4a000e088a0a6550b3e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup:/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] 7089a2163419a5153f94c196740274b5198634c9ef3fb27f1b6aadf1ac2b67ab
[INFO] running `"docker" "start" "-a" "7089a2163419a5153f94c196740274b5198634c9ef3fb27f1b6aadf1ac2b67ab"`
[INFO] [stderr]    Compiling fqdedup v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:136:21
[INFO] [stderr]     |
[INFO] [stderr] 136 |                 let mut output = File::create(output_filename(&args.arg_filename, args.flag_output)).unwrap();
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:148:17
[INFO] [stderr]     |
[INFO] [stderr] 148 |             let mut output = File::create(output_filename(&args.arg_filename, args.flag_output)).unwrap();
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "7089a2163419a5153f94c196740274b5198634c9ef3fb27f1b6aadf1ac2b67ab"`
[INFO] running `"docker" "rm" "-f" "7089a2163419a5153f94c196740274b5198634c9ef3fb27f1b6aadf1ac2b67ab"`
[INFO] [stdout] 7089a2163419a5153f94c196740274b5198634c9ef3fb27f1b6aadf1ac2b67ab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/guertinlab/fqdedup:/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] 5ffe0457359376e67892745d5966e52620f5d34d3d63dda5c32f46de3d4b708b
[INFO] running `"docker" "start" "-a" "5ffe0457359376e67892745d5966e52620f5d34d3d63dda5c32f46de3d4b708b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fqdedup-e54f838d7aa68080
[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" "5ffe0457359376e67892745d5966e52620f5d34d3d63dda5c32f46de3d4b708b"`
[INFO] running `"docker" "rm" "-f" "5ffe0457359376e67892745d5966e52620f5d34d3d63dda5c32f46de3d4b708b"`
[INFO] [stdout] 5ffe0457359376e67892745d5966e52620f5d34d3d63dda5c32f46de3d4b708b