[INFO] fetching crate convertable 0.1.1...
[INFO] checking convertable-0.1.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate convertable 0.1.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate convertable 0.1.1
[INFO] finished tweaking crates.io crate convertable 0.1.1
[INFO] tweaked toml for crates.io crate convertable 0.1.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate convertable 0.1.1 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d270560ac920d4a7c45176682b7fcf7f56f81006b930fee2ecbdcd62e98cb612
[INFO] running `Command { std: "docker" "start" "-a" "d270560ac920d4a7c45176682b7fcf7f56f81006b930fee2ecbdcd62e98cb612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d270560ac920d4a7c45176682b7fcf7f56f81006b930fee2ecbdcd62e98cb612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d270560ac920d4a7c45176682b7fcf7f56f81006b930fee2ecbdcd62e98cb612", kill_on_drop: false }`
[INFO] [stdout] d270560ac920d4a7c45176682b7fcf7f56f81006b930fee2ecbdcd62e98cb612
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 4bc709571ab5749780b46a8d25e2470c1cd06b7ff79205ef92ceb54ae8ee357f
[INFO] running `Command { std: "docker" "start" "-a" "4bc709571ab5749780b46a8d25e2470c1cd06b7ff79205ef92ceb54ae8ee357f", kill_on_drop: false }`
[INFO] [stderr]     Checking convertable v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `C` is never constructed
[INFO] [stdout]   --> src/lib.rs:72:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |             pub struct C<T>(T);
[INFO] [stdout]    |                        ^
[INFO] [stdout] ...
[INFO] [stdout] 78 |         structs!();
[INFO] [stdout]    |         ---------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `structs` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `C` is never constructed
[INFO] [stdout]   --> src/lib.rs:72:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |             pub struct C<T>(T);
[INFO] [stdout]    |                        ^
[INFO] [stdout] ...
[INFO] [stdout] 90 |         structs!();
[INFO] [stdout]    |         ---------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `structs` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `C` is never constructed
[INFO] [stdout]    --> src/lib.rs:72:24
[INFO] [stdout]     |
[INFO] [stdout]  72 |             pub struct C<T>(T);
[INFO] [stdout]     |                        ^
[INFO] [stdout] ...
[INFO] [stdout] 127 |         structs!();
[INFO] [stdout]     |         ---------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `structs` (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<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:133:45
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let actual: Result<B, Infallible> = B::try_convert_from(A(1));
[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<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:20
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:28
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (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<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (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<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (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<tests::convert_into_implies_try_convert_from::B, core::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         assert_eq!(actual, Ok(B(1)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `convertable` (lib test) due to 7 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "4bc709571ab5749780b46a8d25e2470c1cd06b7ff79205ef92ceb54ae8ee357f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bc709571ab5749780b46a8d25e2470c1cd06b7ff79205ef92ceb54ae8ee357f", kill_on_drop: false }`
[INFO] [stdout] 4bc709571ab5749780b46a8d25e2470c1cd06b7ff79205ef92ceb54ae8ee357f