[INFO] updating cached repository Wardormeur/calendar
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Wardormeur/calendar
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Wardormeur/calendar" "work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Wardormeur/calendar" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Wardormeur/calendar"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Wardormeur/calendar'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5c1fe9b40f3204ed995027cfc2a6963c5ce59a47
[INFO] sha for GitHub repo Wardormeur/calendar: 5c1fe9b40f3204ed995027cfc2a6963c5ce59a47
[INFO] validating manifest of Wardormeur/calendar 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 Wardormeur/calendar 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 Wardormeur/calendar
[INFO] finished frobbing Wardormeur/calendar
[INFO] frobbed toml for Wardormeur/calendar written to work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar/Cargo.toml
[INFO] started frobbing Wardormeur/calendar
[INFO] finished frobbing Wardormeur/calendar
[INFO] frobbed toml for Wardormeur/calendar written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Wardormeur/calendar/Cargo.toml
[INFO] crate Wardormeur/calendar 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 Wardormeur/calendar 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar:/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] 4c962aadfd8a77104234eeb35c88e5a732a86403d22fdf321de3f3d26ff5f8a6
[INFO] running `"docker" "start" "-a" "4c962aadfd8a77104234eeb35c88e5a732a86403d22fdf321de3f3d26ff5f8a6"`
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.9
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr]    Compiling ical v0.4.0
[INFO] [stderr]    Compiling vobject v0.6.0 (https://github.com/untitaker/rust-vobject.git#f100677f)
[INFO] [stderr]    Compiling calendar v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     buf.read_to_string(&mut file_content); 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.65s
[INFO] running `"docker" "inspect" "4c962aadfd8a77104234eeb35c88e5a732a86403d22fdf321de3f3d26ff5f8a6"`
[INFO] running `"docker" "rm" "-f" "4c962aadfd8a77104234eeb35c88e5a732a86403d22fdf321de3f3d26ff5f8a6"`
[INFO] [stdout] 4c962aadfd8a77104234eeb35c88e5a732a86403d22fdf321de3f3d26ff5f8a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar:/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] ed84f0ce6f1f59111584986f39aff3271a81bb7e56d5706bc3f7aece637bc132
[INFO] running `"docker" "start" "-a" "ed84f0ce6f1f59111584986f39aff3271a81bb7e56d5706bc3f7aece637bc132"`
[INFO] [stderr]    Compiling calendar v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     buf.read_to_string(&mut file_content); 
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "ed84f0ce6f1f59111584986f39aff3271a81bb7e56d5706bc3f7aece637bc132"`
[INFO] running `"docker" "rm" "-f" "ed84f0ce6f1f59111584986f39aff3271a81bb7e56d5706bc3f7aece637bc132"`
[INFO] [stdout] ed84f0ce6f1f59111584986f39aff3271a81bb7e56d5706bc3f7aece637bc132
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Wardormeur/calendar:/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] d5bc5a840b64472f2ae52d84a24637f45404ec972f4bda9edbd81f1b3ba0b9b7
[INFO] running `"docker" "start" "-a" "d5bc5a840b64472f2ae52d84a24637f45404ec972f4bda9edbd81f1b3ba0b9b7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/calendar-15dd69d6ed4e77f4
[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" "d5bc5a840b64472f2ae52d84a24637f45404ec972f4bda9edbd81f1b3ba0b9b7"`
[INFO] running `"docker" "rm" "-f" "d5bc5a840b64472f2ae52d84a24637f45404ec972f4bda9edbd81f1b3ba0b9b7"`
[INFO] [stdout] d5bc5a840b64472f2ae52d84a24637f45404ec972f4bda9edbd81f1b3ba0b9b7