[INFO] fetching crate studs 0.1.3...
[INFO] checking studs-0.1.3 against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249
[INFO] extracting crate studs 0.1.3 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate studs 0.1.3 on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate studs 0.1.3
[INFO] finished tweaking crates.io crate studs 0.1.3
[INFO] tweaked toml for crates.io crate studs 0.1.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e638d9a51eb879cd2bd266a9fd4159583cecca34a416fb04f495a172c2ea7d46
[INFO] running `Command { std: "docker" "start" "-a" "e638d9a51eb879cd2bd266a9fd4159583cecca34a416fb04f495a172c2ea7d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e638d9a51eb879cd2bd266a9fd4159583cecca34a416fb04f495a172c2ea7d46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e638d9a51eb879cd2bd266a9fd4159583cecca34a416fb04f495a172c2ea7d46", kill_on_drop: false }`
[INFO] [stdout] e638d9a51eb879cd2bd266a9fd4159583cecca34a416fb04f495a172c2ea7d46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3295cd9e4ed152c966d419d47f8154b05597ce3dce9b9d54c904c7e05de016c
[INFO] running `Command { std: "docker" "start" "-a" "d3295cd9e4ed152c966d419d47f8154b05597ce3dce9b9d54c904c7e05de016c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]    Compiling studs-macros-lib v0.1.1
[INFO] [stderr]    Compiling studs-macros v0.1.1
[INFO] [stderr]     Checking studs v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this conversion is useless `E` to `E`
[INFO] [stdout]   --> src/maybe/try.rs:23:58
[INFO] [stdout]    |
[INFO] [stdout] 23 |             Maybe::Err(error) => ControlFlow::Break(Some(error.into())),
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `studs` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this conversion is useless `E` to `E`
[INFO] [stdout]   --> src/maybe/try.rs:23:58
[INFO] [stdout]    |
[INFO] [stdout] 23 |             Maybe::Err(error) => ControlFlow::Break(Some(error.into())),
[INFO] [stdout]    |                                                          ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `studs` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "d3295cd9e4ed152c966d419d47f8154b05597ce3dce9b9d54c904c7e05de016c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3295cd9e4ed152c966d419d47f8154b05597ce3dce9b9d54c904c7e05de016c", kill_on_drop: false }`
[INFO] [stdout] d3295cd9e4ed152c966d419d47f8154b05597ce3dce9b9d54c904c7e05de016c