[INFO] updating cached repository https://github.com/amk91/config_exchanger
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4f6d4b4dba2625887202d3e8b3697f65e21b1fd4
[INFO] testing amk91/config_exchanger against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Famk91%2Fconfig_exchanger" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amk91/config_exchanger on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/amk91/config_exchanger
[INFO] finished tweaking git repo https://github.com/amk91/config_exchanger
[INFO] tweaked toml for git repo https://github.com/amk91/config_exchanger written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/amk91/config_exchanger already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 02dd42772a1d51368345e6a445380f28a2396c9a6674d979824694b8addfa417
[INFO] running `"docker" "start" "-a" "02dd42772a1d51368345e6a445380f28a2396c9a6674d979824694b8addfa417"`
[INFO] [stderr]    Compiling xmlparser v0.6.0
[INFO] [stderr]    Compiling config_exchanger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:244:21
[INFO] [stderr]     |
[INFO] [stderr] 244 |                 let mut buffer = String::from(whitespaces.to_str());
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `"docker" "inspect" "02dd42772a1d51368345e6a445380f28a2396c9a6674d979824694b8addfa417"`
[INFO] running `"docker" "rm" "-f" "02dd42772a1d51368345e6a445380f28a2396c9a6674d979824694b8addfa417"`
[INFO] [stdout] 02dd42772a1d51368345e6a445380f28a2396c9a6674d979824694b8addfa417
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] f04c45f838ed1810d7ae98fc73960246b13a7a891b225e1ed3cbd7502aedcaf1
[INFO] running `"docker" "start" "-a" "f04c45f838ed1810d7ae98fc73960246b13a7a891b225e1ed3cbd7502aedcaf1"`
[INFO] [stderr]    Compiling config_exchanger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:244:21
[INFO] [stderr]     |
[INFO] [stderr] 244 |                 let mut buffer = String::from(whitespaces.to_str());
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "f04c45f838ed1810d7ae98fc73960246b13a7a891b225e1ed3cbd7502aedcaf1"`
[INFO] running `"docker" "rm" "-f" "f04c45f838ed1810d7ae98fc73960246b13a7a891b225e1ed3cbd7502aedcaf1"`
[INFO] [stdout] f04c45f838ed1810d7ae98fc73960246b13a7a891b225e1ed3cbd7502aedcaf1
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] f4913a271092fbd6f4f753e3d524056957e5e0f41e33bb04b5b988314172d01d
[INFO] running `"docker" "start" "-a" "f4913a271092fbd6f4f753e3d524056957e5e0f41e33bb04b5b988314172d01d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/config_exchanger-27bd233378d5659c
[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" "f4913a271092fbd6f4f753e3d524056957e5e0f41e33bb04b5b988314172d01d"`
[INFO] running `"docker" "rm" "-f" "f4913a271092fbd6f4f753e3d524056957e5e0f41e33bb04b5b988314172d01d"`
[INFO] [stdout] f4913a271092fbd6f4f753e3d524056957e5e0f41e33bb04b5b988314172d01d