[INFO] updating cached repository hgentry/euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hgentry/euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hgentry/euler" "work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hgentry/euler" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hgentry/euler"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hgentry/euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f23f520d8658f312214641f5f5b601460e946eb4
[INFO] sha for GitHub repo hgentry/euler: f23f520d8658f312214641f5f5b601460e946eb4
[INFO] validating manifest of hgentry/euler 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 hgentry/euler 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 hgentry/euler
[INFO] finished frobbing hgentry/euler
[INFO] frobbed toml for hgentry/euler written to work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler/Cargo.toml
[INFO] started frobbing hgentry/euler
[INFO] finished frobbing hgentry/euler
[INFO] frobbed toml for hgentry/euler written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hgentry/euler/Cargo.toml
[INFO] crate hgentry/euler 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 hgentry/euler 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler:/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] cdbc12a343561a3826a8e46ef236ff75ada3da1cbb9c696707705ad6096138b9
[INFO] running `"docker" "start" "-a" "cdbc12a343561a3826a8e46ef236ff75ada3da1cbb9c696707705ad6096138b9"`
[INFO] [stderr]    Compiling ord_subset v3.1.0
[INFO] [stderr]    Compiling num-bigint v0.1.35
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/problems/p37.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |         if(left_truncatable(p)) {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::primes`
[INFO] [stderr]  --> src/problems/p40.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::primes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::primes`
[INFO] [stderr]  --> src/problems/p42.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::primes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::vec`
[INFO] [stderr]  --> src/problems/p43.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::vec;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::BTreeMap`
[INFO] [stderr]  --> src/problems/p615.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::BTreeMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/problems/p615.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/problems/p615.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/problems/p43.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |             Some(i) => {},
[INFO] [stderr]    |                  ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problems/p32.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 |             let mut parse = vec!(i, j, n);
[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/problems/p42.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut list : Vec<String> = strings::process_list(s);
[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/problems/p43.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut sv = to_vec(seventeen);
[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/math.rs:97:25
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn next_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[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/math.rs:161:25
[INFO] [stderr]     |
[INFO] [stderr] 161 | pub fn prev_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right_truncatable`
[INFO] [stderr]   --> src/problems/p37.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn right_truncatable(p: i64) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `next_permutation`
[INFO] [stderr]   --> src/utils/math.rs:97:1
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn next_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `list_primes`
[INFO] [stderr]   --> src/utils/primes.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn list_primes(max: i64) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `char_as_val`
[INFO] [stderr]   --> src/utils/strings.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn char_as_val(c: char) -> i64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subvec`
[INFO] [stderr]  --> src/utils/vec.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn subvec<T: Copy>(v: &Vec<T>, a: usize, b: usize) -> Vec<T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.57s
[INFO] running `"docker" "inspect" "cdbc12a343561a3826a8e46ef236ff75ada3da1cbb9c696707705ad6096138b9"`
[INFO] running `"docker" "rm" "-f" "cdbc12a343561a3826a8e46ef236ff75ada3da1cbb9c696707705ad6096138b9"`
[INFO] [stdout] cdbc12a343561a3826a8e46ef236ff75ada3da1cbb9c696707705ad6096138b9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler:/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] e42b3b8b65a74f265b15dc252146939558260d18668cf08fc1e8029e6bdab1b5
[INFO] running `"docker" "start" "-a" "e42b3b8b65a74f265b15dc252146939558260d18668cf08fc1e8029e6bdab1b5"`
[INFO] [stderr]    Compiling euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/problems/p37.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |         if(left_truncatable(p)) {
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::primes`
[INFO] [stderr]  --> src/problems/p40.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::primes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::primes`
[INFO] [stderr]  --> src/problems/p42.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::primes;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `utils::vec`
[INFO] [stderr]  --> src/problems/p43.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use utils::vec;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::BTreeMap`
[INFO] [stderr]  --> src/problems/p615.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::BTreeMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/problems/p615.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/problems/p615.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/problems/p43.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |             Some(i) => {},
[INFO] [stderr]    |                  ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/problems/p32.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 |             let mut parse = vec!(i, j, n);
[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/problems/p42.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut list : Vec<String> = strings::process_list(s);
[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/problems/p43.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 |         let mut sv = to_vec(seventeen);
[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/math.rs:97:25
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn next_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[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/math.rs:161:25
[INFO] [stderr]     |
[INFO] [stderr] 161 | pub fn prev_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `right_truncatable`
[INFO] [stderr]   --> src/problems/p37.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn right_truncatable(p: i64) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `next_permutation`
[INFO] [stderr]   --> src/utils/math.rs:97:1
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn next_permutation(mut input: &Vec<i64>) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `list_primes`
[INFO] [stderr]   --> src/utils/primes.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn list_primes(max: i64) -> Vec<i64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `char_as_val`
[INFO] [stderr]   --> src/utils/strings.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn char_as_val(c: char) -> i64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subvec`
[INFO] [stderr]  --> src/utils/vec.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn subvec<T: Copy>(v: &Vec<T>, a: usize, b: usize) -> Vec<T> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "e42b3b8b65a74f265b15dc252146939558260d18668cf08fc1e8029e6bdab1b5"`
[INFO] running `"docker" "rm" "-f" "e42b3b8b65a74f265b15dc252146939558260d18668cf08fc1e8029e6bdab1b5"`
[INFO] [stdout] e42b3b8b65a74f265b15dc252146939558260d18668cf08fc1e8029e6bdab1b5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hgentry/euler:/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] 7552fa4ddb5ea65dd94094604c73ac2d27cd90d52350dadb247070e14d59d5f7
[INFO] running `"docker" "start" "-a" "7552fa4ddb5ea65dd94094604c73ac2d27cd90d52350dadb247070e14d59d5f7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/euler-55190142981538d5
[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" "7552fa4ddb5ea65dd94094604c73ac2d27cd90d52350dadb247070e14d59d5f7"`
[INFO] running `"docker" "rm" "-f" "7552fa4ddb5ea65dd94094604c73ac2d27cd90d52350dadb247070e14d59d5f7"`
[INFO] [stdout] 7552fa4ddb5ea65dd94094604c73ac2d27cd90d52350dadb247070e14d59d5f7