[INFO] fetching crate memtest 0.4.0...
[INFO] checking memtest-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate memtest 0.4.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate memtest 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate memtest 0.4.0
[INFO] tweaked toml for crates.io crate memtest 0.4.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate memtest 0.4.0 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 memtest 0.4.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0fa4ffa227d17e2850e5424d65dc2a91bb0b4c511f5c5cbf00a5f0e0e93ae158
[INFO] running `Command { std: "docker" "start" "-a" "0fa4ffa227d17e2850e5424d65dc2a91bb0b4c511f5c5cbf00a5f0e0e93ae158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0fa4ffa227d17e2850e5424d65dc2a91bb0b4c511f5c5cbf00a5f0e0e93ae158", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fa4ffa227d17e2850e5424d65dc2a91bb0b4c511f5c5cbf00a5f0e0e93ae158", kill_on_drop: false }`
[INFO] [stdout] 0fa4ffa227d17e2850e5424d65dc2a91bb0b4c511f5c5cbf00a5f0e0e93ae158
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6f0b4a9dd105939fce00a5db6e01e68ce60fdb4a30ba6797d485fa3d01807849
[INFO] running `Command { std: "docker" "start" "-a" "6f0b4a9dd105939fce00a5db6e01e68ce60fdb4a30ba6797d485fa3d01807849", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling zerocopy v0.8.25
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling anyhow v1.0.98
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking smallvec v1.15.0
[INFO] [stderr]     Checking tracing-core v0.1.33
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking memtest v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/usage.rs:63:34
[INFO] [stdout]    |
[INFO] [stdout] 63 |         iter.next().and_then(|s| s.parse().ok()).ok_or($n)?
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     let test_kinds_string: String = parse_next!("test_kinds");
[INFO] [stdout]    |                                     ------------------------- in this macro invocation
[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 `parse_next` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memtest` (example "usage") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "6f0b4a9dd105939fce00a5db6e01e68ce60fdb4a30ba6797d485fa3d01807849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f0b4a9dd105939fce00a5db6e01e68ce60fdb4a30ba6797d485fa3d01807849", kill_on_drop: false }`
[INFO] [stdout] 6f0b4a9dd105939fce00a5db6e01e68ce60fdb4a30ba6797d485fa3d01807849