[INFO] updating cached repository hasanhaja/rust_book_workthrough
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hasanhaja/rust_book_workthrough
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hasanhaja/rust_book_workthrough" "work/ex/beta-1.38-1/sources/1.37.0/gh/hasanhaja/rust_book_workthrough"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hasanhaja/rust_book_workthrough'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hasanhaja/rust_book_workthrough" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fb94a901fa00cfef7e3484d23d28279d003a7cf0
[INFO] sha for GitHub repo hasanhaja/rust_book_workthrough: fb94a901fa00cfef7e3484d23d28279d003a7cf0
[INFO] validating manifest of hasanhaja/rust_book_workthrough 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 hasanhaja/rust_book_workthrough 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 hasanhaja/rust_book_workthrough
[INFO] finished frobbing hasanhaja/rust_book_workthrough
[INFO] frobbed toml for hasanhaja/rust_book_workthrough written to work/ex/beta-1.38-1/sources/1.37.0/gh/hasanhaja/rust_book_workthrough/Cargo.toml
[INFO] started frobbing hasanhaja/rust_book_workthrough
[INFO] finished frobbing hasanhaja/rust_book_workthrough
[INFO] frobbed toml for hasanhaja/rust_book_workthrough written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough/Cargo.toml
[INFO] crate hasanhaja/rust_book_workthrough 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 hasanhaja/rust_book_workthrough against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 6f4567fa97af94c7dca7f3867b9912c998b4ffd9f273255ef98541fddca5a062
[INFO] running `"docker" "start" "-a" "6f4567fa97af94c7dca7f3867b9912c998b4ffd9f273255ef98541fddca5a062"`
[INFO] [stderr]    Compiling rust_book_workthrough v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `crate::structs::Rectangle`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::structs::Rectangle;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Person`
[INFO] [stderr]  --> src/structs.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Person {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangle`
[INFO] [stderr]   --> src/structs.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Triangle {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/structs.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn area(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]   --> src/structs.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct Rectangle {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `square`
[INFO] [stderr]   --> src/structs.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn square(size: u64) -> Rectangle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/structs.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn area(&self) -> u64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_hold`
[INFO] [stderr]   --> src/structs.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Guess`
[INFO] [stderr]   --> src/main.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Guess {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn new(value: i32) -> Guess {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "6f4567fa97af94c7dca7f3867b9912c998b4ffd9f273255ef98541fddca5a062"`
[INFO] running `"docker" "rm" "-f" "6f4567fa97af94c7dca7f3867b9912c998b4ffd9f273255ef98541fddca5a062"`
[INFO] [stdout] 6f4567fa97af94c7dca7f3867b9912c998b4ffd9f273255ef98541fddca5a062
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e5b1809ce2d636f83adfda96696078160514fb1cc21b7d37ad9e8aed91fe547f
[INFO] running `"docker" "start" "-a" "e5b1809ce2d636f83adfda96696078160514fb1cc21b7d37ad9e8aed91fe547f"`
[INFO] [stderr]    Compiling rust_book_workthrough v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Person`
[INFO] [stderr]  --> src/structs.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Person {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Triangle`
[INFO] [stderr]   --> src/structs.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct Triangle {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/structs.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn area(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `square`
[INFO] [stderr]   --> src/structs.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn square(size: u64) -> Rectangle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/structs.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn area(&self) -> u64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `value`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     value: i32,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "e5b1809ce2d636f83adfda96696078160514fb1cc21b7d37ad9e8aed91fe547f"`
[INFO] running `"docker" "rm" "-f" "e5b1809ce2d636f83adfda96696078160514fb1cc21b7d37ad9e8aed91fe547f"`
[INFO] [stdout] e5b1809ce2d636f83adfda96696078160514fb1cc21b7d37ad9e8aed91fe547f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hasanhaja/rust_book_workthrough:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 34ac4729ca1e5ecfcd427b1b58b7ad056e05ecb33b3a9961ec353cd7f5fcafef
[INFO] running `"docker" "start" "-a" "34ac4729ca1e5ecfcd427b1b58b7ad056e05ecb33b3a9961ec353cd7f5fcafef"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_book_workthrough-67ec5a6c7e4d12fe
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test tests::another_one ... ok
[INFO] [stdout] test tests::greeting_contains_name ... ok
[INFO] [stdout] test tests::it_adds_two ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::larger_can_hold_smaller ... ok
[INFO] [stdout] test tests::result_works ... ok
[INFO] [stdout] test tests::smaller_cannot_hold_larger ... ok
[INFO] [stdout] test tests::greater_than_100 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "34ac4729ca1e5ecfcd427b1b58b7ad056e05ecb33b3a9961ec353cd7f5fcafef"`
[INFO] running `"docker" "rm" "-f" "34ac4729ca1e5ecfcd427b1b58b7ad056e05ecb33b3a9961ec353cd7f5fcafef"`
[INFO] [stdout] 34ac4729ca1e5ecfcd427b1b58b7ad056e05ecb33b3a9961ec353cd7f5fcafef