[INFO] cloning repository https://github.com/seritools/rust-exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/seritools/rust-exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseritools%2Frust-exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseritools%2Frust-exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cd6ef05e36dcc533f2fc4876a87b57893f061e7d
[INFO] checking seritools/rust-exercises against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseritools%2Frust-exercises" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/seritools/rust-exercises on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/seritools/rust-exercises
[INFO] finished tweaking git repo https://github.com/seritools/rust-exercises
[INFO] tweaked toml for git repo https://github.com/seritools/rust-exercises written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/seritools/rust-exercises 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 825e9e5c6285edfa4690e7c9e84bbcc9cd014894f3d7e0debb7762983e432dbc
[INFO] running `Command { std: "docker" "start" "-a" "825e9e5c6285edfa4690e7c9e84bbcc9cd014894f3d7e0debb7762983e432dbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "825e9e5c6285edfa4690e7c9e84bbcc9cd014894f3d7e0debb7762983e432dbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "825e9e5c6285edfa4690e7c9e84bbcc9cd014894f3d7e0debb7762983e432dbc", kill_on_drop: false }`
[INFO] [stdout] 825e9e5c6285edfa4690e7c9e84bbcc9cd014894f3d7e0debb7762983e432dbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09f10c151aad6b36ad19c322517b13922134fcddae232d0872de65388a591b30
[INFO] running `Command { std: "docker" "start" "-a" "09f10c151aad6b36ad19c322517b13922134fcddae232d0872de65388a591b30", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]     Checking rust-exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter
[INFO] [stdout] 7 |     // We're going to exploit the property that, where a is negative, a % b == a mod b - b
[INFO] [stdout] 8 |     let rem_error = if a < 0 { b } else { 0 };
[INFO] [stdout]   |                        -   ^ expected type parameter `T`, found integer
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        expected because this is `T`
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]                        found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `if` and `else` have incompatible types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:8:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter
[INFO] [stdout] 7 |     // We're going to exploit the property that, where a is negative, a % b == a mod b - b
[INFO] [stdout] 8 |     let rem_error = if a < 0 { b } else { 0 };
[INFO] [stdout]   |                                -          ^ expected type parameter `T`, found integer
[INFO] [stdout]   |                                |
[INFO] [stdout]   |                                expected because of this
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]                        found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter                                          - expected `T` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 9 |     a % b + rem_error
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ expected type parameter `T`, found associated type
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]             found associated type `<T as Rem>::Output`
[INFO] [stdout]   = note: the caller chooses a type for `T` which can be different from `<T as Rem>::Output`
[INFO] [stdout] help: consider further restricting this bound
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem<Output = T> + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |                                           ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-exercises` (bin "generic-numbers" test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter
[INFO] [stdout] 7 |     // We're going to exploit the property that, where a is negative, a % b == a mod b - b
[INFO] [stdout] 8 |     let rem_error = if a < 0 { b } else { 0 };
[INFO] [stdout]   |                        -   ^ expected type parameter `T`, found integer
[INFO] [stdout]   |                        |
[INFO] [stdout]   |                        expected because this is `T`
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]                        found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: `if` and `else` have incompatible types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:8:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter
[INFO] [stdout] 7 |     // We're going to exploit the property that, where a is negative, a % b == a mod b - b
[INFO] [stdout] 8 |     let rem_error = if a < 0 { b } else { 0 };
[INFO] [stdout]   |                                -          ^ expected type parameter `T`, found integer
[INFO] [stdout]   |                                |
[INFO] [stdout]   |                                expected because of this
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]                        found type `{integer}`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/bin/generic-numbers.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |           - expected this type parameter                                          - expected `T` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 9 |     a % b + rem_error
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ expected type parameter `T`, found associated type
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected type parameter `T`
[INFO] [stdout]             found associated type `<T as Rem>::Output`
[INFO] [stdout]   = note: the caller chooses a type for `T` which can be different from `<T as Rem>::Output`
[INFO] [stdout] help: consider further restricting this bound
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn modulo<T: std::ops::Add + std::ops::Rem<Output = T> + std::cmp::PartialOrd>(a: T, b: T) -> T {
[INFO] [stdout]   |                                           ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-exercises` (bin "generic-numbers") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "09f10c151aad6b36ad19c322517b13922134fcddae232d0872de65388a591b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f10c151aad6b36ad19c322517b13922134fcddae232d0872de65388a591b30", kill_on_drop: false }`
[INFO] [stdout] 09f10c151aad6b36ad19c322517b13922134fcddae232d0872de65388a591b30