[INFO] fetching crate strflags 0.3.1...
[INFO] checking strflags-0.3.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate strflags 0.3.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate strflags 0.3.1
[INFO] finished tweaking crates.io crate strflags 0.3.1
[INFO] tweaked toml for crates.io crate strflags 0.3.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate strflags 0.3.1 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages to latest compatible versions
[INFO] [stderr]       Adding convert_case v0.6.0 (available: v0.9.0)
[INFO] [stderr]       Adding ecow v0.1.2 (available: v0.2.6)
[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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a4c83329fd1f808b5646a26a30425ff9301ee261196ee4524a10dd8171e4f09
[INFO] running `Command { std: "docker" "start" "-a" "1a4c83329fd1f808b5646a26a30425ff9301ee261196ee4524a10dd8171e4f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a4c83329fd1f808b5646a26a30425ff9301ee261196ee4524a10dd8171e4f09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a4c83329fd1f808b5646a26a30425ff9301ee261196ee4524a10dd8171e4f09", kill_on_drop: false }`
[INFO] [stdout] 1a4c83329fd1f808b5646a26a30425ff9301ee261196ee4524a10dd8171e4f09
[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 -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] b82f582848c6007b2d17999f39c25c04ab8baea7fbc6335dd5fcacd2de4d55db
[INFO] running `Command { std: "docker" "start" "-a" "b82f582848c6007b2d17999f39c25c04ab8baea7fbc6335dd5fcacd2de4d55db", kill_on_drop: false }`
[INFO] [stderr]     Checking ecow v0.1.2
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]    Compiling litrs v0.4.2
[INFO] [stderr]    Compiling identconv v0.2.0
[INFO] [stderr]     Checking strflags v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<Animal, Infallible>
[INFO] [stdout]   --> tests/test.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout]  4 | / str_flags! {
[INFO] [stdout]  5 | |     Animal: [
[INFO] [stdout]  6 | |         #[doc="dog"]
[INFO] [stdout]  7 | |         Dog,
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | }
[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 macro `::strflags::str_enum` which comes from the expansion of the macro `str_flags` (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<Animal, Infallible>
[INFO] [stdout]   --> tests/test.rs:4:1
[INFO] [stdout]    |
[INFO] [stdout]  4 | / str_flags! {
[INFO] [stdout]  5 | |     Animal: [
[INFO] [stdout]  6 | |         #[doc="dog"]
[INFO] [stdout]  7 | |         Dog,
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `::strflags::str_enum` which comes from the expansion of the macro `str_flags` (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<VeryLarge, Infallible>
[INFO] [stdout]   --> tests/test.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | / str_enum! {
[INFO] [stdout] 21 | |     VeryLarge : [
[INFO] [stdout] 22 | |         // This is fine as long as we don't use it
[INFO] [stdout] 23 | |         NNopjejqiewjqvckqnvkoqpvjqpcqkc
[INFO] [stdout] 24 | |     ]
[INFO] [stdout] 25 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `str_enum` (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<VeryLarge, Infallible>
[INFO] [stdout]   --> tests/test.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | / str_enum! {
[INFO] [stdout] 21 | |     VeryLarge : [
[INFO] [stdout] 22 | |         // This is fine as long as we don't use it
[INFO] [stdout] 23 | |         NNopjejqiewjqvckqnvkoqpvjqpcqkc
[INFO] [stdout] 24 | |     ]
[INFO] [stdout] 25 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `str_enum` (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<Language, Infallible>
[INFO] [stdout]    --> tests/test.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | / str_flags! {
[INFO] [stdout] 148 | |     #[derive(Default, PartialOrd, Ord)]
[INFO] [stdout] 149 | |     pub Language: [
[INFO] [stdout] 150 | |         /// Crab
[INFO] [stdout] ...   |
[INFO] [stdout] 155 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `::strflags::str_enum` which comes from the expansion of the macro `str_flags` (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<Language, Infallible>
[INFO] [stdout]    --> tests/test.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | / str_flags! {
[INFO] [stdout] 148 | |     #[derive(Default, PartialOrd, Ord)]
[INFO] [stdout] 149 | |     pub Language: [
[INFO] [stdout] 150 | |         /// Crab
[INFO] [stdout] ...   |
[INFO] [stdout] 155 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `::strflags::str_enum` which comes from the expansion of the macro `str_flags` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `strflags` (test "test") due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "b82f582848c6007b2d17999f39c25c04ab8baea7fbc6335dd5fcacd2de4d55db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b82f582848c6007b2d17999f39c25c04ab8baea7fbc6335dd5fcacd2de4d55db", kill_on_drop: false }`
[INFO] [stdout] b82f582848c6007b2d17999f39c25c04ab8baea7fbc6335dd5fcacd2de4d55db