[INFO] fetching crate this_is_b 0.2.2...
[INFO] checking this_is_b-0.2.2 against 65b20a97de33e9e59992793a144aef2950c48c76 for pr-154715
[INFO] extracting crate this_is_b 0.2.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate this_is_b 0.2.2
[INFO] finished tweaking crates.io crate this_is_b 0.2.2
[INFO] tweaked toml for crates.io crate this_is_b 0.2.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate this_is_b 0.2.2 on toolchain 65b20a97de33e9e59992793a144aef2950c48c76
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate this_is_b 0.2.2 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" "+65b20a97de33e9e59992793a144aef2950c48c76" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57
[INFO] running `Command { std: "docker" "start" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57" "/opt/rustwide/cargo-home/bin/cargo" "+65b20a97de33e9e59992793a144aef2950c48c76" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking this_is_b v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0404]: expected trait, found trait alias `Try`
[INFO] [stdout]   --> src/lib.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl<S, T,> Try for B<S, T,>
[INFO] [stdout]    |             ^^^ not a trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `Output` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:87:31
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Output` not found here
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn from_output(output: Self::Output,) -> Self
[INFO] [stdout]    |                                  ^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `Residual` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:92:51
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Residual` not found here
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn branch(self,) -> core::ops::ControlFlow<Self::Residual, Self::Output,>
[INFO] [stdout]    |                                                      ^^^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `Output` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:92:67
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Output` not found here
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn branch(self,) -> core::ops::ControlFlow<Self::Residual, Self::Output,>
[INFO] [stdout]    |                                                                      ^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `B<S, T>: Branch` is not satisfied
[INFO] [stdout]    --> src/lib.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |     type TryType = B<S, T,>;
[INFO] [stdout]     |                    ^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]     |
[INFO] [stdout] help: the nightly-only, unstable trait `Branch` is not implemented for `B<S, T>`
[INFO] [stdout]    --> src/lib.rs:13:1
[INFO] [stdout]     |
[INFO] [stdout]  13 | pub enum B<S, T,>
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0404, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error[E0404]: expected trait, found trait alias `Try`
[INFO] [stdout]   --> src/lib.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl<S, T,> Try for B<S, T,>
[INFO] [stdout]    |             ^^^ not a trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `this_is_b` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no variant named `Output` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:87:31
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Output` not found here
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn from_output(output: Self::Output,) -> Self
[INFO] [stdout]    |                                  ^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `Residual` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:92:51
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Residual` not found here
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn branch(self,) -> core::ops::ControlFlow<Self::Residual, Self::Output,>
[INFO] [stdout]    |                                                      ^^^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `Output` found for enum `B<S, T>`
[INFO] [stdout]   --> src/lib.rs:92:67
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub enum B<S, T,>
[INFO] [stdout]    | ----------------- variant `Output` not found here
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn branch(self,) -> core::ops::ControlFlow<Self::Residual, Self::Output,>
[INFO] [stdout]    |                                                                      ^^^^^^ variant not found in `B<S, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `B<S, T>: Branch` is not satisfied
[INFO] [stdout]    --> src/lib.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |     type TryType = B<S, T,>;
[INFO] [stdout]     |                    ^^^^^^^^ unsatisfied trait bound
[INFO] [stdout]     |
[INFO] [stdout] help: the nightly-only, unstable trait `Branch` is not implemented for `B<S, T>`
[INFO] [stdout]    --> src/lib.rs:13:1
[INFO] [stdout]     |
[INFO] [stdout]  13 | pub enum B<S, T,>
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0404, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `this_is_b` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57", kill_on_drop: false }`
[INFO] [stdout] d2e2b0822ef9bbcba4ec8e940d98f21bd5ef0b16f58636dce87a860b8aab7d57
