[INFO] updating cached repository fgaray/project-euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fgaray/project-euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fgaray/project-euler-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fgaray/project-euler-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fgaray/project-euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fgaray/project-euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d61b820d5bdb1b22269fa9c173c836d3cca64bc5
[INFO] sha for GitHub repo fgaray/project-euler-rust: d61b820d5bdb1b22269fa9c173c836d3cca64bc5
[INFO] validating manifest of fgaray/project-euler-rust 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 fgaray/project-euler-rust 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 fgaray/project-euler-rust
[INFO] finished frobbing fgaray/project-euler-rust
[INFO] frobbed toml for fgaray/project-euler-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust/Cargo.toml
[INFO] started frobbing fgaray/project-euler-rust
[INFO] finished frobbing fgaray/project-euler-rust
[INFO] frobbed toml for fgaray/project-euler-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fgaray/project-euler-rust/Cargo.toml
[INFO] crate fgaray/project-euler-rust 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 fgaray/project-euler-rust 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust:/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] 38ab8f10e4e84b358fade1016d022aafb195c30fc0fb4421fa5a727ccfd92471
[INFO] running `"docker" "start" "-a" "38ab8f10e4e84b358fade1016d022aafb195c30fc0fb4421fa5a727ccfd92471"`
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem3/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]  --> src/problem9/mod.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     for b in (1..1000) {
[INFO] [stderr]   |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]  --> src/problem9/mod.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         for c in (1..1000) {
[INFO] [stderr]   |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem10/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d1`
[INFO] [stderr]  --> src/problem4/mod.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |             ^^ help: consider prefixing with an underscore: `_d1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d2`
[INFO] [stderr]  --> src/problem4/mod.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |             ^^ help: consider prefixing with an underscore: `_d2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem3/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |    let mut v = prime.get_mem();
[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] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |         ----^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |         ----^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/utils/prime.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v = Vec::new();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/utils/prime.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut v = Vec::with_capacity(capacity);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem3/mod.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem4/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve() -> i32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem5/mod.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem6/mod.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn solve(upper: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem7/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem9/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve(constant: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mem`
[INFO] [stderr]   --> src/utils/prime.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn get_mem(&mut self) -> &Vec<i64> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/utils/number.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn reverse(n: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "38ab8f10e4e84b358fade1016d022aafb195c30fc0fb4421fa5a727ccfd92471"`
[INFO] running `"docker" "rm" "-f" "38ab8f10e4e84b358fade1016d022aafb195c30fc0fb4421fa5a727ccfd92471"`
[INFO] [stdout] 38ab8f10e4e84b358fade1016d022aafb195c30fc0fb4421fa5a727ccfd92471
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust:/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] 2c207f8ace29cbdca45d7fbb12176f8c60a492a954791640809be795daeb4261
[INFO] running `"docker" "start" "-a" "2c207f8ace29cbdca45d7fbb12176f8c60a492a954791640809be795daeb4261"`
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem3/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]  --> src/problem9/mod.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     for b in (1..1000) {
[INFO] [stderr]   |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]  --> src/problem9/mod.rs:7:18
[INFO] [stderr]   |
[INFO] [stderr] 7 |         for c in (1..1000) {
[INFO] [stderr]   |                  ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std`
[INFO] [stderr]  --> src/problem10/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d1`
[INFO] [stderr]  --> src/problem4/mod.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |             ^^ help: consider prefixing with an underscore: `_d1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d2`
[INFO] [stderr]  --> src/problem4/mod.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |             ^^ help: consider prefixing with an underscore: `_d2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problem3/mod.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |    let mut v = prime.get_mem();
[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] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/problem4/mod.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut d1 = 1;
[INFO] [stderr]   |         ----^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/problem4/mod.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut d2 = 1;
[INFO] [stderr]   |         ----^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/utils/prime.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let mut v = Vec::new();
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/utils/prime.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut v = Vec::with_capacity(capacity);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem3/mod.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem4/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve() -> i32 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem5/mod.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem6/mod.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn solve(upper: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem7/mod.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn solve(n: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]  --> src/problem9/mod.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn solve(constant: i64) -> i64 {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_mem`
[INFO] [stderr]   --> src/utils/prime.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn get_mem(&mut self) -> &Vec<i64> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/utils/number.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn reverse(n: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "2c207f8ace29cbdca45d7fbb12176f8c60a492a954791640809be795daeb4261"`
[INFO] running `"docker" "rm" "-f" "2c207f8ace29cbdca45d7fbb12176f8c60a492a954791640809be795daeb4261"`
[INFO] [stdout] 2c207f8ace29cbdca45d7fbb12176f8c60a492a954791640809be795daeb4261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fgaray/project-euler-rust:/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] 42b2b7ea659799f0c03c081c0dfbd99e084c491d78f8dd565ef0d840669a3c01
[INFO] running `"docker" "start" "-a" "42b2b7ea659799f0c03c081c0dfbd99e084c491d78f8dd565ef0d840669a3c01"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/euler-d2fb64dee04c2518
[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" "42b2b7ea659799f0c03c081c0dfbd99e084c491d78f8dd565ef0d840669a3c01"`
[INFO] running `"docker" "rm" "-f" "42b2b7ea659799f0c03c081c0dfbd99e084c491d78f8dd565ef0d840669a3c01"`
[INFO] [stdout] 42b2b7ea659799f0c03c081c0dfbd99e084c491d78f8dd565ef0d840669a3c01