[INFO] fetching crate gruggers 0.6.0...
[INFO] checking gruggers-0.6.0 against try#21cad1f647cfd05a566220f933edd88a53e50bcf for pr-129249-1
[INFO] extracting crate gruggers 0.6.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate gruggers 0.6.0
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate gruggers 0.6.0
[INFO] tweaked toml for crates.io crate gruggers 0.6.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate gruggers 0.6.0 on toolchain 21cad1f647cfd05a566220f933edd88a53e50bcf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+21cad1f647cfd05a566220f933edd88a53e50bcf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate gruggers 0.6.0 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" "+21cad1f647cfd05a566220f933edd88a53e50bcf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836
[INFO] running `Command { std: "docker" "start" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836", 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" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836" "/opt/rustwide/cargo-home/bin/cargo" "+21cad1f647cfd05a566220f933edd88a53e50bcf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836", 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" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836" "/opt/rustwide/cargo-home/bin/cargo" "+21cad1f647cfd05a566220f933edd88a53e50bcf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking allocator-api2 v0.4.0
[INFO] [stderr]    Compiling gruggers v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking gruggers-core v0.6.0
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:25:11
[INFO] [stdout]    |
[INFO] [stdout] 25 |             return Err(Box::from("")).into();
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 |         return Err(Box::from("Compilation failed")).into();
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:80:3
[INFO] [stdout]    |
[INFO] [stdout] 80 |         Err(Box::from("err")).into()
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 return Err(Box::from("Expected path to mod api after '-m'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 return Err(Box::from("Expected path to file after '-i'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |                 return Err(Box::from("Expected mods directory after '-d'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:129:11
[INFO] [stdout]     |
[INFO] [stdout] 129 |             return Err(Box::from("Unexpected switch in arguments")).into();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:135:10
[INFO] [stdout]     |
[INFO] [stdout] 135 |         return Err(Box::from("Expected at least one file to compile")).into();
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gruggers` (bin "grugc" test) due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:25:11
[INFO] [stdout]    |
[INFO] [stdout] 25 |             return Err(Box::from("")).into();
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 |         return Err(Box::from("Compilation failed")).into();
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<(), Box<dyn std::error::Error>>`
[INFO] [stdout]   --> src/main.rs:80:3
[INFO] [stdout]    |
[INFO] [stdout] 80 |         Err(Box::from("err")).into()
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: you can instead use the fully-qualified path `<std::result::Result<(), Box<dyn std::error::Error>> as Into<std::result::Result<(), Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 return Err(Box::from("Expected path to mod api after '-m'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 return Err(Box::from("Expected path to file after '-i'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |                 return Err(Box::from("Expected mods directory after '-d'")).into();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:129:11
[INFO] [stdout]     |
[INFO] [stdout] 129 |             return Err(Box::from("Unexpected switch in arguments")).into();
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::result::Result<CliArgs, Box<dyn std::error::Error>>`
[INFO] [stdout]    --> src/main.rs:135:10
[INFO] [stdout]     |
[INFO] [stdout] 135 |         return Err(Box::from("Expected at least one file to compile")).into();
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]     = note: you can instead use the fully-qualified path `<std::result::Result<CliArgs, Box<dyn std::error::Error>> as Into<std::result::Result<CliArgs, Box<dyn std::error::Error>>>::into(val) to avoid triggering this lint
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gruggers` (bin "grugc") due to 8 previous errors
[INFO] running `Command { std: "docker" "inspect" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836", kill_on_drop: false }`
[INFO] [stdout] 42f269c426484d13faa9cd1ee58e10d5d90ef950a99e6829c696dc8592d20836