[INFO] fetching crate option-symbology 0.2.0...
[INFO] checking option-symbology-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate option-symbology 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate option-symbology 0.2.0
[INFO] finished tweaking crates.io crate option-symbology 0.2.0
[INFO] tweaked toml for crates.io crate option-symbology 0.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate option-symbology 0.2.0 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] 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 16 packages to latest compatible versions
[INFO] [stderr]       Adding fancy-regex v0.6.0 (available: v0.16.2)
[INFO] [stderr]       Adding strum v0.21.0 (available: v0.27.2)
[INFO] [stderr]       Adding strum_macros v0.21.1 (available: v0.27.2)
[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] 985ce80dd8726f0625ecb526074e83631ab79b042cd6f56b10fba25aee88de41
[INFO] running `Command { std: "docker" "start" "-a" "985ce80dd8726f0625ecb526074e83631ab79b042cd6f56b10fba25aee88de41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "985ce80dd8726f0625ecb526074e83631ab79b042cd6f56b10fba25aee88de41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "985ce80dd8726f0625ecb526074e83631ab79b042cd6f56b10fba25aee88de41", kill_on_drop: false }`
[INFO] [stdout] 985ce80dd8726f0625ecb526074e83631ab79b042cd6f56b10fba25aee88de41
[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] a05a1d38650ddc2f845c53af17242a9cc4bbb18832420e61d75604f408c2645f
[INFO] running `Command { std: "docker" "start" "-a" "a05a1d38650ddc2f845c53af17242a9cc4bbb18832420e61d75604f408c2645f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking strum v0.21.0
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking fancy-regex v0.6.0
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]     Checking option-symbology v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/options/mod.rs:115:21
[INFO] [stdout]     |
[INFO] [stdout] 115 |             symbol: cap.name("symbol").unwrap().as_str().parse().unwrap(),
[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<String, Infallible>
[INFO] [stdout]    --> src/options/mod.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |             symbol: cap.name("symbol").unwrap().as_str().parse().unwrap(),
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `option-symbology` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/options/mod.rs:115:21
[INFO] [stdout]     |
[INFO] [stdout] 115 |             symbol: cap.name("symbol").unwrap().as_str().parse().unwrap(),
[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<String, Infallible>
[INFO] [stdout]    --> src/options/mod.rs:148:21
[INFO] [stdout]     |
[INFO] [stdout] 148 |             symbol: cap.name("symbol").unwrap().as_str().parse().unwrap(),
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `option-symbology` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "a05a1d38650ddc2f845c53af17242a9cc4bbb18832420e61d75604f408c2645f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a05a1d38650ddc2f845c53af17242a9cc4bbb18832420e61d75604f408c2645f", kill_on_drop: false }`
[INFO] [stdout] a05a1d38650ddc2f845c53af17242a9cc4bbb18832420e61d75604f408c2645f