[INFO] updating cached repository CloneRob/circular_sampler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CloneRob/circular_sampler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CloneRob/circular_sampler" "work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CloneRob/circular_sampler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CloneRob/circular_sampler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CloneRob/circular_sampler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fe6474a6ded12a11cef15f1e46a927d083ab4928
[INFO] sha for GitHub repo CloneRob/circular_sampler: fe6474a6ded12a11cef15f1e46a927d083ab4928
[INFO] validating manifest of CloneRob/circular_sampler 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 CloneRob/circular_sampler 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 CloneRob/circular_sampler
[INFO] finished frobbing CloneRob/circular_sampler
[INFO] frobbed toml for CloneRob/circular_sampler written to work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler/Cargo.toml
[INFO] started frobbing CloneRob/circular_sampler
[INFO] finished frobbing CloneRob/circular_sampler
[INFO] frobbed toml for CloneRob/circular_sampler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CloneRob/circular_sampler/Cargo.toml
[INFO] crate CloneRob/circular_sampler 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 CloneRob/circular_sampler 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler:/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] 8d49bfe8eeb7fc0600c74b18142057b0530e76a5339b509ae7244b51a41a838c
[INFO] running `"docker" "start" "-a" "8d49bfe8eeb7fc0600c74b18142057b0530e76a5339b509ae7244b51a41a838c"`
[INFO] [stderr]    Compiling adler32 v0.3.0
[INFO] [stderr]    Compiling inflate v0.1.1
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling gif v0.9.0
[INFO] [stderr]    Compiling deque v0.3.1
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr]    Compiling rayon v0.6.0
[INFO] [stderr]    Compiling deflate v0.7.4
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling jpeg-decoder v0.1.11
[INFO] [stderr]    Compiling png v0.6.2
[INFO] [stderr]    Compiling image v0.12.3
[INFO] [stderr]    Compiling image_split v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::ffi::OsStr`
[INFO] [stderr]  --> src/argparse/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ffi::OsStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]   --> src/crop/mod.rs:11:11
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::{thread, time};
[INFO] [stderr]    |           ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source_path`
[INFO] [stderr]    --> src/argparse/mod.rs:208:9
[INFO] [stderr]     |
[INFO] [stderr] 208 |     let source_path = if let Some(p) = source_str {
[INFO] [stderr]     |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_source_path`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `label_map`
[INFO] [stderr]   --> src/argparse/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     label_map: Option<HashMap<String, String>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `label_map`
[INFO] [stderr]   --> src/argparse/mod.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn label_map(mut self, map: HashMap<String, String>) -> ParamBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/argparse/mod.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_x`
[INFO] [stderr]   --> src/candidates/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn get_x(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_y`
[INFO] [stderr]   --> src/candidates/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get_y(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_int`
[INFO] [stderr]   --> src/candidates/mod.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn to_int(self) -> (i32, i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]   --> src/candidates/mod.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn print(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transform_points`
[INFO] [stderr]   --> src/candidates/mod.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn transform_points(points: Vec<Point>, transformer: Point) -> Vec<Point> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.09s
[INFO] running `"docker" "inspect" "8d49bfe8eeb7fc0600c74b18142057b0530e76a5339b509ae7244b51a41a838c"`
[INFO] running `"docker" "rm" "-f" "8d49bfe8eeb7fc0600c74b18142057b0530e76a5339b509ae7244b51a41a838c"`
[INFO] [stdout] 8d49bfe8eeb7fc0600c74b18142057b0530e76a5339b509ae7244b51a41a838c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler:/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] 0288d0e26c36ee6f75f7981a8f0e4ba6d8366c2b7490d29ed7842c48135f651b
[INFO] running `"docker" "start" "-a" "0288d0e26c36ee6f75f7981a8f0e4ba6d8366c2b7490d29ed7842c48135f651b"`
[INFO] [stderr]    Compiling image_split v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::ffi::OsStr`
[INFO] [stderr]  --> src/argparse/mod.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ffi::OsStr;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]   --> src/crop/mod.rs:11:11
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::{thread, time};
[INFO] [stderr]    |           ^^^^^^  ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `source_path`
[INFO] [stderr]    --> src/argparse/mod.rs:208:9
[INFO] [stderr]     |
[INFO] [stderr] 208 |     let source_path = if let Some(p) = source_str {
[INFO] [stderr]     |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_source_path`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `label_map`
[INFO] [stderr]   --> src/argparse/mod.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     label_map: Option<HashMap<String, String>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `label_map`
[INFO] [stderr]   --> src/argparse/mod.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     fn label_map(mut self, map: HashMap<String, String>) -> ParamBuilder {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]    --> src/argparse/mod.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn print(&self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_x`
[INFO] [stderr]   --> src/candidates/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn get_x(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_y`
[INFO] [stderr]   --> src/candidates/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn get_y(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_int`
[INFO] [stderr]   --> src/candidates/mod.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn to_int(self) -> (i32, i32) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `print`
[INFO] [stderr]   --> src/candidates/mod.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn print(&self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `transform_points`
[INFO] [stderr]   --> src/candidates/mod.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn transform_points(points: Vec<Point>, transformer: Point) -> Vec<Point> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "0288d0e26c36ee6f75f7981a8f0e4ba6d8366c2b7490d29ed7842c48135f651b"`
[INFO] running `"docker" "rm" "-f" "0288d0e26c36ee6f75f7981a8f0e4ba6d8366c2b7490d29ed7842c48135f651b"`
[INFO] [stdout] 0288d0e26c36ee6f75f7981a8f0e4ba6d8366c2b7490d29ed7842c48135f651b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/CloneRob/circular_sampler:/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] bee2bd202478944574f44e7497ceb3b13596dd6372426fdc9fdff1d825cff269
[INFO] running `"docker" "start" "-a" "bee2bd202478944574f44e7497ceb3b13596dd6372426fdc9fdff1d825cff269"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/image_split-e22224bc3c024e09
[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" "bee2bd202478944574f44e7497ceb3b13596dd6372426fdc9fdff1d825cff269"`
[INFO] running `"docker" "rm" "-f" "bee2bd202478944574f44e7497ceb3b13596dd6372426fdc9fdff1d825cff269"`
[INFO] [stdout] bee2bd202478944574f44e7497ceb3b13596dd6372426fdc9fdff1d825cff269