[INFO] cloning repository https://github.com/qtheperfect/crustography
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qtheperfect/crustography" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqtheperfect%2Fcrustography", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqtheperfect%2Fcrustography'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c16c43c35fe0b988fcf84f3d80f50be00603753b
[INFO] checking qtheperfect/crustography against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqtheperfect%2Fcrustography" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/qtheperfect/crustography
[INFO] finished tweaking git repo https://github.com/qtheperfect/crustography
[INFO] tweaked toml for git repo https://github.com/qtheperfect/crustography written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/qtheperfect/crustography on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/qtheperfect/crustography already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking qtheperfect/crustography against try#b4c55082edd8dec08ce8af276d7054d9c4db20c4 for pr-147984
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqtheperfect%2Fcrustography" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/qtheperfect/crustography
[INFO] finished tweaking git repo https://github.com/qtheperfect/crustography
[INFO] tweaked toml for git repo https://github.com/qtheperfect/crustography written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/qtheperfect/crustography on toolchain b4c55082edd8dec08ce8af276d7054d9c4db20c4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/qtheperfect/crustography already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45dd26eea3c37662a19ce2bac6fe00097af6df97c6bf76a36c83b9be4511c9f4
[INFO] running `Command { std: "docker" "start" "-a" "45dd26eea3c37662a19ce2bac6fe00097af6df97c6bf76a36c83b9be4511c9f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45dd26eea3c37662a19ce2bac6fe00097af6df97c6bf76a36c83b9be4511c9f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45dd26eea3c37662a19ce2bac6fe00097af6df97c6bf76a36c83b9be4511c9f4", kill_on_drop: false }`
[INFO] [stdout] 45dd26eea3c37662a19ce2bac6fe00097af6df97c6bf76a36c83b9be4511c9f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b4c55082edd8dec08ce8af276d7054d9c4db20c4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41cfc44ffaf02e6ccf254f1207a83fa80e798a298e522c6d006c640e8eb8aebc
[INFO] running `Command { std: "docker" "start" "-a" "41cfc44ffaf02e6ccf254f1207a83fa80e798a298e522c6d006c640e8eb8aebc", kill_on_drop: false }`
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking crustography v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/cnrt.rs:16:2
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     /** Find (u, v, c) s.t.
[INFO] [stdout] 17 | |      *   u > 0, v <= 0, coprime(u, v),
[INFO] [stdout] 18 | |      *   ux + vy = c */
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 19 | /     if *y == BigInt::ZERO {
[INFO] [stdout] 20 | |         (BigInt::from(1), BigInt::from(mark), x.clone())
[INFO] [stdout] 21 | |     }
[INFO] [stdout] 22 | |     else {
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |         (u, v, c)
[INFO] [stdout] 28 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/cnrt.rs:16:2
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     /** Find (u, v, c) s.t.
[INFO] [stdout] 17 | |      *   u > 0, v <= 0, coprime(u, v),
[INFO] [stdout] 18 | |      *   ux + vy = c */
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 19 | /     if *y == BigInt::ZERO {
[INFO] [stdout] 20 | |         (BigInt::from(1), BigInt::from(mark), x.clone())
[INFO] [stdout] 21 | |     }
[INFO] [stdout] 22 | |     else {
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |         (u, v, c)
[INFO] [stdout] 28 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cnrt.rs:36:74
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn looper(mut x1: BigInt, x2: BigInt, mut s11: BigInt, mut s21: BigInt, mut s12: BigInt, mut s22: BigInt)
[INFO] [stdout]    |                                                                             ----^^^
[INFO] [stdout]    |                                                                             |
[INFO] [stdout]    |                                                                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cnrt.rs:36:74
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn looper(mut x1: BigInt, x2: BigInt, mut s11: BigInt, mut s21: BigInt, mut s12: BigInt, mut s22: BigInt)
[INFO] [stdout]    |                                                                             ----^^^
[INFO] [stdout]    |                                                                             |
[INFO] [stdout]    |                                                                             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cnrt.rs:36:91
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn looper(mut x1: BigInt, x2: BigInt, mut s11: BigInt, mut s21: BigInt, mut s12: BigInt, mut s22: BigInt)
[INFO] [stdout]    |                                                                                              ----^^^
[INFO] [stdout]    |                                                                                              |
[INFO] [stdout]    |                                                                                              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cnrt.rs:36:91
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn looper(mut x1: BigInt, x2: BigInt, mut s11: BigInt, mut s21: BigInt, mut s12: BigInt, mut s22: BigInt)
[INFO] [stdout]    |                                                                                              ----^^^
[INFO] [stdout]    |                                                                                              |
[INFO] [stdout]    |                                                                                              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/cnrt.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let (u, v, c) = bezout(m1, m2);
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/cnrt.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let (u, v, c) = bezout(m1, m2);
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/cnrt.rs:158:6
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let result = testers.iter()
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/cnrt.rs:158:6
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let result = testers.iter()
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bezout_marked` is never used
[INFO] [stdout]   --> src/cnrt.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn bezout_marked(x: &BigInt, y: &BigInt, mark: i32) -> (BigInt, BigInt, BigInt) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bezout_recursive` is never used
[INFO] [stdout]   --> src/cnrt.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn bezout_recursive(x: &BigInt, y: &BigInt) -> (BigInt, BigInt, BigInt) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bezout_marked` is never used
[INFO] [stdout]   --> src/cnrt.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn bezout_marked(x: &BigInt, y: &BigInt, mark: i32) -> (BigInt, BigInt, BigInt) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_bezout` is never used
[INFO] [stdout]   --> src/cnrt.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn test_bezout() {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bezout_recursive` is never used
[INFO] [stdout]   --> src/cnrt.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn bezout_recursive(x: &BigInt, y: &BigInt) -> (BigInt, BigInt, BigInt) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_bezout` is never used
[INFO] [stdout]   --> src/cnrt.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn test_bezout() {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "41cfc44ffaf02e6ccf254f1207a83fa80e798a298e522c6d006c640e8eb8aebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41cfc44ffaf02e6ccf254f1207a83fa80e798a298e522c6d006c640e8eb8aebc", kill_on_drop: false }`
[INFO] [stdout] 41cfc44ffaf02e6ccf254f1207a83fa80e798a298e522c6d006c640e8eb8aebc