[INFO] cloning repository guertinlab/fqdedup
[INFO] running `"git" "clone" "--bare" "git://github.com/guertinlab/fqdedup.git" "work/cache/sources/gh/guertinlab/fqdedup"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/guertinlab/fqdedup'...
[INFO] running `"git" "clone" "work/cache/sources/gh/guertinlab/fqdedup" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/guertinlab/fqdedup"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/guertinlab/fqdedup'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/guertinlab/fqdedup" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/guertinlab/fqdedup"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/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 master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of guertinlab/fqdedup on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "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/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/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/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/guertinlab/fqdedup/Cargo.toml
[INFO] crate guertinlab/fqdedup already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded patricia_tree v0.1.1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking guertinlab/fqdedup against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-7/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/guertinlab/fqdedup:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 20278763f3d1209a6e48187ea0993098b079e2edfeee269769888418112db46a
[INFO] running `"docker" "start" "-a" "20278763f3d1209a6e48187ea0993098b079e2edfeee269769888418112db46a"`
[INFO] [stderr]     Checking patricia_tree v0.1.1
[INFO] [stderr]     Checking docopt v0.8.1
[INFO] [stderr]     Checking 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] 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 3.65s
[INFO] running `"docker" "inspect" "20278763f3d1209a6e48187ea0993098b079e2edfeee269769888418112db46a"`
[INFO] running `"docker" "rm" "-f" "20278763f3d1209a6e48187ea0993098b079e2edfeee269769888418112db46a"`
[INFO] [stdout] 20278763f3d1209a6e48187ea0993098b079e2edfeee269769888418112db46a