[INFO] cloning repository https://github.com/DexerMatters/algebra-effect-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DexerMatters/algebra-effect-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDexerMatters%2Falgebra-effect-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDexerMatters%2Falgebra-effect-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d546a305ba5a224ef9ef483680367ad2f9bcbf32
[INFO] checking DexerMatters/algebra-effect-rs against master#da2544bfbe84df7b24d83c029c74299ebf6112c6 for pr-149681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDexerMatters%2Falgebra-effect-rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/DexerMatters/algebra-effect-rs
[INFO] finished tweaking git repo https://github.com/DexerMatters/algebra-effect-rs
[INFO] tweaked toml for git repo https://github.com/DexerMatters/algebra-effect-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DexerMatters/algebra-effect-rs on toolchain da2544bfbe84df7b24d83c029c74299ebf6112c6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+da2544bfbe84df7b24d83c029c74299ebf6112c6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DexerMatters/algebra-effect-rs 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" "+da2544bfbe84df7b24d83c029c74299ebf6112c6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+da2544bfbe84df7b24d83c029c74299ebf6112c6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49320d233bbd9afc5832a2d662598a353c1e7c9cdbb8b2f6feffa04f14e9140b
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[INFO] running `Command { std: "docker" "inspect" "49320d233bbd9afc5832a2d662598a353c1e7c9cdbb8b2f6feffa04f14e9140b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49320d233bbd9afc5832a2d662598a353c1e7c9cdbb8b2f6feffa04f14e9140b", kill_on_drop: false }`
[INFO] [stdout] 49320d233bbd9afc5832a2d662598a353c1e7c9cdbb8b2f6feffa04f14e9140b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+da2544bfbe84df7b24d83c029c74299ebf6112c6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c384ffb52f8d69378b46ef3365113f3d7045666bed89a104d25270ee85e404b6
[INFO] running `Command { std: "docker" "start" "-a" "c384ffb52f8d69378b46ef3365113f3d7045666bed89a104d25270ee85e404b6", kill_on_drop: false }`
[INFO] [stderr]     Checking algebra-effect v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected type, found `;`
[INFO] [stdout]   --> src/lib.rs:41:49
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Element, Tail: Row> Row for Cons<T, Tail> {
[INFO] [stdout]    |                                                   - while parsing this item list starting here
[INFO] [stdout] 40 |     type Push<U: Element> = Cons<U, Self>;
[INFO] [stdout] 41 |     type Exist<U: Element> = /* implement it! */;
[INFO] [stdout]    |                                                 ^ expected type
[INFO] [stdout] ...
[INFO] [stdout] 47 | }
[INFO] [stdout]    | - the item list ends here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::marker::PhantomData`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::marker::PhantomData;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `Exist`, `Tail`, `tail`
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 15 |     type Exist<T: Element>: Bool;
[INFO] [stdout]    |     ---------------------------- `Exist` from trait
[INFO] [stdout] 16 |     type Tail: Row;
[INFO] [stdout]    |     -------------- `Tail` from trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn tail(self) -> Self::Tail;
[INFO] [stdout]    |     ---------------------------- `tail` from trait
[INFO] [stdout] ...
[INFO] [stdout] 39 | impl<T: Element, Tail: Row> Row for Cons<T, Tail> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Exist`, `Tail`, `tail` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algebra-effect` (lib test) due to 8 previous errors; 1 warning emitted
[INFO] [stdout] error[E0277]: the trait bound `u32: Element` is not satisfied
[INFO] [stdout]   --> src/lib.rs:55:24
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let row = Cons(1u32, Cons("hello", Nil));
[INFO] [stdout]    |                   ---- ^^^^ the trait `Element` is not implemented for `u32`
[INFO] [stdout]    |                   |
[INFO] [stdout]    |                   required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait Element {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `Cons`
[INFO] [stdout]   --> src/lib.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    |                    ^^^^^^^ required by this bound in `Cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the trait bound `&str: Element` is not satisfied
[INFO] [stdout]   --> src/lib.rs:55:35
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let row = Cons(1u32, Cons("hello", Nil));
[INFO] [stdout]    |                              ---- ^^^^^^^ the trait `Element` is not implemented for `&str`
[INFO] [stdout]    |                              |
[INFO] [stdout]    |                              required by a bound introduced by this call
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait Element {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `Cons`
[INFO] [stdout]   --> src/lib.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    |                    ^^^^^^^ required by this bound in `Cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `&str: Element` is not satisfied
[INFO] [stdout]   --> src/lib.rs:55:30
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let row = Cons(1u32, Cons("hello", Nil));
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^ the trait `Element` is not implemented for `&str`
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait Element {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `Cons`
[INFO] [stdout]   --> src/lib.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    |                    ^^^^^^^ required by this bound in `Cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `u32: Element` is not satisfied
[INFO] [stdout]   --> src/lib.rs:55:19
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let row = Cons(1u32, Cons("hello", Nil));
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Element` is not implemented for `u32`
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait Element {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `Cons`
[INFO] [stdout]   --> src/lib.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    |                    ^^^^^^^ required by this bound in `Cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `&str: Element` is not satisfied
[INFO] [stdout]   --> src/lib.rs:55:19
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let row = Cons(1u32, Cons("hello", Nil));
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Element` is not implemented for `&str`
[INFO] [stdout]    |
[INFO] [stdout] help: this trait has no implementations, consider adding one
[INFO] [stdout]   --> src/lib.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub trait Element {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: required by a bound in `Cons`
[INFO] [stdout]   --> src/lib.rs:28:20
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    |                    ^^^^^^^ required by this bound in `Cons`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: the method `push` exists for struct `Cons<u32, Cons<&str, Nil>>`, but its trait bounds were not satisfied
[INFO] [stdout]   --> src/lib.rs:56:23
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Cons<T: Element, Tail: Row>(T, Tail);
[INFO] [stdout]    | -------------------------------------- method `push` not found for this struct because it doesn't satisfy `Cons<&str, Nil>: Row` or `Cons<u32, Cons<&str, Nil>>: Row`
[INFO] [stdout] ...
[INFO] [stdout] 56 |         let row = row.push(3.14f64);
[INFO] [stdout]    |                       ^^^^ method cannot be called on `Cons<u32, Cons<&str, Nil>>` due to unsatisfied trait bounds
[INFO] [stdout]    |
[INFO] [stdout] note: the following trait bounds were not satisfied:
[INFO] [stdout]       `Cons<&str, Nil>: Row`
[INFO] [stdout]       `u32: Element`
[INFO] [stdout]   --> src/lib.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Element, Tail: Row> Row for Cons<T, Tail> {
[INFO] [stdout]    |         ^^^^^^^        ^^^  ---     -------------
[INFO] [stdout]    |         |              |
[INFO] [stdout]    |         |              unsatisfied trait bound introduced here
[INFO] [stdout]    |         unsatisfied trait bound introduced here
[INFO] [stdout] note: the trait `Row` must be implemented
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Row {
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout]    = help: items from traits can only be used if the trait is implemented and in scope
[INFO] [stdout] note: `Row` defines an item `push`, perhaps you need to implement it
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Row {
[INFO] [stdout]    | ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0277, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `;`
[INFO] [stdout]   --> src/lib.rs:41:49
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl<T: Element, Tail: Row> Row for Cons<T, Tail> {
[INFO] [stdout]    |                                                   - while parsing this item list starting here
[INFO] [stdout] 40 |     type Push<U: Element> = Cons<U, Self>;
[INFO] [stdout] 41 |     type Exist<U: Element> = /* implement it! */;
[INFO] [stdout]    |                                                 ^ expected type
[INFO] [stdout] ...
[INFO] [stdout] 47 | }
[INFO] [stdout]    | - the item list ends here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::marker::PhantomData`
[INFO] [stdout]  --> src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::marker::PhantomData;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `Exist`, `Tail`, `tail`
[INFO] [stdout]   --> src/lib.rs:39:1
[INFO] [stdout]    |
[INFO] [stdout] 15 |     type Exist<T: Element>: Bool;
[INFO] [stdout]    |     ---------------------------- `Exist` from trait
[INFO] [stdout] 16 |     type Tail: Row;
[INFO] [stdout]    |     -------------- `Tail` from trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn tail(self) -> Self::Tail;
[INFO] [stdout]    |     ---------------------------- `tail` from trait
[INFO] [stdout] ...
[INFO] [stdout] 39 | impl<T: Element, Tail: Row> Row for Cons<T, Tail> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `Exist`, `Tail`, `tail` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algebra-effect` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "c384ffb52f8d69378b46ef3365113f3d7045666bed89a104d25270ee85e404b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c384ffb52f8d69378b46ef3365113f3d7045666bed89a104d25270ee85e404b6", kill_on_drop: false }`
[INFO] [stdout] c384ffb52f8d69378b46ef3365113f3d7045666bed89a104d25270ee85e404b6
