[INFO] fetching crate big_num_math 5.4.7...
[INFO] checking big_num_math-5.4.7 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate big_num_math 5.4.7 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate big_num_math 5.4.7
[INFO] finished tweaking crates.io crate big_num_math 5.4.7
[INFO] tweaked toml for crates.io crate big_num_math 5.4.7 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate big_num_math 5.4.7 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 big_num_math 5.4.7 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 474ecfeaedbf203b0151b255b92b2992008eccd15760df934e435d8ef1f26ef0
[INFO] running `Command { std: "docker" "start" "-a" "474ecfeaedbf203b0151b255b92b2992008eccd15760df934e435d8ef1f26ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "474ecfeaedbf203b0151b255b92b2992008eccd15760df934e435d8ef1f26ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "474ecfeaedbf203b0151b255b92b2992008eccd15760df934e435d8ef1f26ef0", kill_on_drop: false }`
[INFO] [stdout] 474ecfeaedbf203b0151b255b92b2992008eccd15760df934e435d8ef1f26ef0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 05c358fc75b2a0d8fb4443d45162713471a653373217617716f7c5d1687f582a
[INFO] running `Command { std: "docker" "start" "-a" "05c358fc75b2a0d8fb4443d45162713471a653373217617716f7c5d1687f582a", kill_on_drop: false }`
[INFO] [stderr]     Checking big_num_math v5.4.7 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1605:36
[INFO] [stdout]      |
[INFO] [stdout] 1605 |                 if let Ok(prime) = TryInto::<$size>::try_into(attempt) {
[INFO] [stdout]      |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4752 |                     let test = || pg!(lim, PrimeGenStrain::Lim, false, usize, None);
[INFO] [stdout]      |                                   ------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]      = note: this error originates in the macro `pg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1720:32
[INFO] [stdout]      |
[INFO] [stdout] 1720 |             if let Ok(prime) = TryInto::<$size>::try_into(attempt) {
[INFO] [stdout]      |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4972 |                     let test = || pg_sw!(lim, PrimeGenStrain::Lim, false, usize, None);
[INFO] [stdout]      |                                   ---------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `pg_sw` (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<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1720:32
[INFO] [stdout]      |
[INFO] [stdout] 1720 |             if let Ok(prime) = TryInto::<$size>::try_into(attempt) {
[INFO] [stdout]      |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 5010 |                 let test = || pg_sw!(7919, PrimeGenStrain::Lim, true, usize, None);
[INFO] [stdout]      |                               ---------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `pg_sw` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]     --> src/lib.rs:1720:32
[INFO] [stdout]      |
[INFO] [stdout] 1720 |             if let Ok(prime) = TryInto::<$size>::try_into(attempt) {
[INFO] [stdout]      |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 5017 |                 let test = || pg_sw!(1000, PrimeGenStrain::Nth, true, usize, None);
[INFO] [stdout]      |                               ---------------------------------------------------- in this macro invocation
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `pg_sw` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `big_num_math` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "05c358fc75b2a0d8fb4443d45162713471a653373217617716f7c5d1687f582a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05c358fc75b2a0d8fb4443d45162713471a653373217617716f7c5d1687f582a", kill_on_drop: false }`
[INFO] [stdout] 05c358fc75b2a0d8fb4443d45162713471a653373217617716f7c5d1687f582a