[INFO] fetching crate derive_convert 0.6.0...
[INFO] checking derive_convert-0.6.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate derive_convert 0.6.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate derive_convert 0.6.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate derive_convert 0.6.0
[INFO] tweaked toml for crates.io crate derive_convert 0.6.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate derive_convert 0.6.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate derive_convert 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 662be4a7142e4b2f3dff6d7415839770746a41e55b3c253024e2144055441d74
[INFO] running `Command { std: "docker" "start" "-a" "662be4a7142e4b2f3dff6d7415839770746a41e55b3c253024e2144055441d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "662be4a7142e4b2f3dff6d7415839770746a41e55b3c253024e2144055441d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "662be4a7142e4b2f3dff6d7415839770746a41e55b3c253024e2144055441d74", kill_on_drop: false }`
[INFO] [stdout] 662be4a7142e4b2f3dff6d7415839770746a41e55b3c253024e2144055441d74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 557cbb2ecb7817432123952a0d121ccf999dfac0eb62627e32e0fabc87fe4cf3
[INFO] running `Command { std: "docker" "start" "-a" "557cbb2ecb7817432123952a0d121ccf999dfac0eb62627e32e0fabc87fe4cf3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]     Checking unicode-ident v1.0.11
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking quote v1.0.32
[INFO] [stderr]     Checking derive_convert v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]  --> tests/from.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Foo1` is never constructed
[INFO] [stdout]   --> tests/from.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Foo1 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Foo2` is never constructed
[INFO] [stdout]   --> tests/from.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | struct Foo2 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Foo, Error>
[INFO] [stdout]   --> tests/try_from_ref.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Convert, Debug)]
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Error>, Option<String>>
[INFO] [stdout]   --> tests/try_from_ref.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Convert, Debug)]
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Error>
[INFO] [stdout]   --> tests/try_from_ref.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Convert, Debug)]
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Foo, Error>
[INFO] [stdout]   --> tests/try_from_ref.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | #[derive(Convert, Debug)]
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Error>
[INFO] [stdout]   --> tests/try_from_ref.rs:35:59
[INFO] [stdout]    |
[INFO] [stdout] 35 |       fn try_from(value: &Bar) -> Result<Self, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________^
[INFO] [stdout] 36 | |         Ok(value.0.clone())
[INFO] [stdout] 37 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Error>
[INFO] [stdout]   --> tests/try_from_ref.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         Ok(value.0.clone())
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive_convert` (test "try_from_ref") due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i32>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Option<i32>>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<i32>, Infallible>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, String>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i32>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Option<i32>>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Option<i32>>
[INFO] [stdout]  --> tests/try_from_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive_convert` (test "try_from_self_struct") due to 9 previous errors
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, String>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `derive_convert` (test "try_from_struct") due to 9 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i32>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i64>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i64, Infallible>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i32>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, i128>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]  --> tests/try_from_self_struct.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Convert, PartialEq, Debug)]
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Convert` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "557cbb2ecb7817432123952a0d121ccf999dfac0eb62627e32e0fabc87fe4cf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557cbb2ecb7817432123952a0d121ccf999dfac0eb62627e32e0fabc87fe4cf3", kill_on_drop: false }`
[INFO] [stdout] 557cbb2ecb7817432123952a0d121ccf999dfac0eb62627e32e0fabc87fe4cf3