[INFO] fetching crate optics 0.3.0...
[INFO] checking optics-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate optics 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate optics 0.3.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate optics 0.3.0
[INFO] tweaked toml for crates.io crate optics 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate optics 0.3.0 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 optics 0.3.0 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] fe40a86037f3d8c4d3e47c5a443afa3248ebfd3223287451218ad4de9f5877dc
[INFO] running `Command { std: "docker" "start" "-a" "fe40a86037f3d8c4d3e47c5a443afa3248ebfd3223287451218ad4de9f5877dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe40a86037f3d8c4d3e47c5a443afa3248ebfd3223287451218ad4de9f5877dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe40a86037f3d8c4d3e47c5a443afa3248ebfd3223287451218ad4de9f5877dc", kill_on_drop: false }`
[INFO] [stdout] fe40a86037f3d8c4d3e47c5a443afa3248ebfd3223287451218ad4de9f5877dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4501ebeb8a64a7944bad58a451d31c34149abcfbc81620d8b2450e2b88e6ba92
[INFO] running `Command { std: "docker" "start" "-a" "4501ebeb8a64a7944bad58a451d31c34149abcfbc81620d8b2450e2b88e6ba92", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking unicode-segmentation v1.12.0
[INFO] [stderr]     Checking optics v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking convert_case v0.8.0
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.101
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:48
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[INFO] [stdout]     |                                                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     assert_eq!(wrapping_add_one.try_get(&val), Ok(6));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:16
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:50
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[INFO] [stdout]     |                                                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[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<u32, Infallible>
[INFO] [stdout]    --> src/test/mod.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     assert_eq!(wrapping_add_three.try_get(&val), Ok(2));
[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 `optics` (lib test) due to 12 previous errors
[INFO] running `Command { std: "docker" "inspect" "4501ebeb8a64a7944bad58a451d31c34149abcfbc81620d8b2450e2b88e6ba92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4501ebeb8a64a7944bad58a451d31c34149abcfbc81620d8b2450e2b88e6ba92", kill_on_drop: false }`
[INFO] [stdout] 4501ebeb8a64a7944bad58a451d31c34149abcfbc81620d8b2450e2b88e6ba92