[INFO] cloning repository https://github.com/lieuwex/appel
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lieuwex/appel" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flieuwex%2Fappel", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flieuwex%2Fappel'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 696874db7d9d602c633b09eba5fb8ff4042d82b9
[INFO] checking lieuwex/appel against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flieuwex%2Fappel" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lieuwex/appel on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lieuwex/appel
[INFO] finished tweaking git repo https://github.com/lieuwex/appel
[INFO] tweaked toml for git repo https://github.com/lieuwex/appel written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lieuwex/appel 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dyn-clonable-impl v0.9.0
[INFO] [stderr]   Downloaded dyn-clonable v0.9.0
[INFO] [stderr]   Downloaded dtoa v1.0.9
[INFO] [stderr]   Downloaded az v1.2.1
[INFO] [stderr]   Downloaded dyn-clone v1.0.16
[INFO] [stderr]   Downloaded pom v3.3.0
[INFO] [stderr]   Downloaded serde_derive v1.0.190
[INFO] [stderr]   Downloaded serde v1.0.190
[INFO] [stderr]   Downloaded itertools v0.12.0
[INFO] [stderr]   Downloaded syn v2.0.38
[INFO] [stderr]   Downloaded rug v1.22.0
[INFO] [stderr]   Downloaded bstr v1.7.0
[INFO] [stderr]   Downloaded libc v0.2.149
[INFO] [stderr]   Downloaded windows-sys v0.42.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0ab8828473428f3987b82391d8744bd3a25f9d8920c336c2ab1f912b925eff2
[INFO] running `Command { std: "docker" "start" "-a" "c0ab8828473428f3987b82391d8744bd3a25f9d8920c336c2ab1f912b925eff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0ab8828473428f3987b82391d8744bd3a25f9d8920c336c2ab1f912b925eff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0ab8828473428f3987b82391d8744bd3a25f9d8920c336c2ab1f912b925eff2", kill_on_drop: false }`
[INFO] [stdout] c0ab8828473428f3987b82391d8744bd3a25f9d8920c336c2ab1f912b925eff2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7ad9c0eb5bd4fd2a8d1aa7980404ad144b3a65345af828cb7a9d016a0a81143
[INFO] running `Command { std: "docker" "start" "-a" "e7ad9c0eb5bd4fd2a8d1aa7980404ad144b3a65345af828cb7a9d016a0a81143", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling rug v1.22.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking dyn-clone v1.0.16
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking dtoa v1.0.9
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.12.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking bstr v1.7.0
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking pom v3.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling dyn-clonable-impl v0.9.0
[INFO] [stderr]     Checking dyn-clonable v0.9.0
[INFO] [stderr]     Checking appel v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]  --> src/executor/chain.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::TryFrom, iter};
[INFO] [stdout]   |                             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]  --> src/executor/chain.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::TryFrom, iter};
[INFO] [stdout]   |                             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/executor/chain.rs:118:18
[INFO] [stdout]     |
[INFO] [stdout] 118 |                 .intersperse(Ok(" ".to_string()))
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    --> src/main.rs:3:1
[INFO] [stdout]     |
[INFO] [stdout] 3   + #![feature(iter_intersperse)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/executor/chain.rs:118:18
[INFO] [stdout]     |
[INFO] [stdout] 118 |                 .intersperse(Ok(" ".to_string()))
[INFO] [stdout]     |                  ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]    --> src/main.rs:3:1
[INFO] [stdout]     |
[INFO] [stdout] 3   + #![feature(iter_intersperse)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `scalar` is never used
[INFO] [stdout]   --> src/executor/chain.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl IterShape {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn scalar(&self) -> Option<Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `scalar`, `get_at`, `take_at`, and `iter_mut` are never used
[INFO] [stdout]   --> src/executor/matrix.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Matrix {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn scalar(&self) -> Option<&Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn get_at(&self, i: usize) -> Option<&Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn take_at(self, i: usize) -> Option<Ratio> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn iter_mut(&mut self) -> std::slice::IterMut<Ratio> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `scalar` is never used
[INFO] [stdout]   --> src/executor/chain.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl IterShape {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub fn scalar(&self) -> Option<Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `scalar`, `get_at`, `take_at`, and `iter_mut` are never used
[INFO] [stdout]   --> src/executor/matrix.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Matrix {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 47 |     pub fn scalar(&self) -> Option<&Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn get_at(&self, i: usize) -> Option<&Ratio> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn take_at(self, i: usize) -> Option<Ratio> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn iter_mut(&mut self) -> std::slice::IterMut<Ratio> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `Command { std: "docker" "inspect" "e7ad9c0eb5bd4fd2a8d1aa7980404ad144b3a65345af828cb7a9d016a0a81143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7ad9c0eb5bd4fd2a8d1aa7980404ad144b3a65345af828cb7a9d016a0a81143", kill_on_drop: false }`
[INFO] [stdout] e7ad9c0eb5bd4fd2a8d1aa7980404ad144b3a65345af828cb7a9d016a0a81143