[INFO] updating cached repository ahouts/math166-assignment1
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ahouts/math166-assignment1
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ahouts/math166-assignment1" "work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ahouts/math166-assignment1" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ahouts/math166-assignment1"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ahouts/math166-assignment1'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8e83adcbbbd1826d4baf2281479c4f06269b41d2
[INFO] sha for GitHub repo ahouts/math166-assignment1: 8e83adcbbbd1826d4baf2281479c4f06269b41d2
[INFO] validating manifest of ahouts/math166-assignment1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ahouts/math166-assignment1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ahouts/math166-assignment1
[INFO] finished frobbing ahouts/math166-assignment1
[INFO] frobbed toml for ahouts/math166-assignment1 written to work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1/Cargo.toml
[INFO] started frobbing ahouts/math166-assignment1
[INFO] finished frobbing ahouts/math166-assignment1
[INFO] frobbed toml for ahouts/math166-assignment1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ahouts/math166-assignment1/Cargo.toml
[INFO] crate ahouts/math166-assignment1 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing ahouts/math166-assignment1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6e92c90dc7daf1b822f48803f04dc55aba83c03019332b7ff99d0b7d539f7547
[INFO] running `"docker" "start" "-a" "6e92c90dc7daf1b822f48803f04dc55aba83c03019332b7ff99d0b7d539f7547"`
[INFO] [stderr]    Compiling assignment1 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:34:21
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 Err(e) => {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `"docker" "inspect" "6e92c90dc7daf1b822f48803f04dc55aba83c03019332b7ff99d0b7d539f7547"`
[INFO] running `"docker" "rm" "-f" "6e92c90dc7daf1b822f48803f04dc55aba83c03019332b7ff99d0b7d539f7547"`
[INFO] [stdout] 6e92c90dc7daf1b822f48803f04dc55aba83c03019332b7ff99d0b7d539f7547
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] cecad1c0ae034f5c7d36f26f355c2a8349e1e29aca673790facd72df1ebd516a
[INFO] running `"docker" "start" "-a" "cecad1c0ae034f5c7d36f26f355c2a8349e1e29aca673790facd72df1ebd516a"`
[INFO] [stderr]    Compiling assignment1 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:34:21
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 Err(e) => {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "cecad1c0ae034f5c7d36f26f355c2a8349e1e29aca673790facd72df1ebd516a"`
[INFO] running `"docker" "rm" "-f" "cecad1c0ae034f5c7d36f26f355c2a8349e1e29aca673790facd72df1ebd516a"`
[INFO] [stdout] cecad1c0ae034f5c7d36f26f355c2a8349e1e29aca673790facd72df1ebd516a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ahouts/math166-assignment1:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 172518644c713a1a7105a4080b40bfeaa572590945c9bd1bccc41a0005e9c089
[INFO] running `"docker" "start" "-a" "172518644c713a1a7105a4080b40bfeaa572590945c9bd1bccc41a0005e9c089"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/assignment1-32051c1930459678
[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" "172518644c713a1a7105a4080b40bfeaa572590945c9bd1bccc41a0005e9c089"`
[INFO] running `"docker" "rm" "-f" "172518644c713a1a7105a4080b40bfeaa572590945c9bd1bccc41a0005e9c089"`
[INFO] [stdout] 172518644c713a1a7105a4080b40bfeaa572590945c9bd1bccc41a0005e9c089