[INFO] fetching crate decstr 0.2.0...
[INFO] checking decstr-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate decstr 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate decstr 0.2.0
[INFO] finished tweaking crates.io crate decstr 0.2.0
[INFO] tweaked toml for crates.io crate decstr 0.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate decstr 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] crate crates.io crate decstr 0.2.0 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-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] 9d69361db983971f9561386c5148578b675ca82bc600e30c44f6e93f530be04d
[INFO] running `Command { std: "docker" "start" "-a" "9d69361db983971f9561386c5148578b675ca82bc600e30c44f6e93f530be04d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d69361db983971f9561386c5148578b675ca82bc600e30c44f6e93f530be04d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d69361db983971f9561386c5148578b675ca82bc600e30c44f6e93f530be04d", kill_on_drop: false }`
[INFO] [stdout] 9d69361db983971f9561386c5148578b675ca82bc600e30c44f6e93f530be04d
[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] 085e4a58348d3123e3a30c08acfee9c02a95aada4499d6f2b4e60290bff671d3
[INFO] running `Command { std: "docker" "start" "-a" "085e4a58348d3123e3a30c08acfee9c02a95aada4499d6f2b4e60290bff671d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling decnumber-sys v0.1.5
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking decstr v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 128 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/buf/dynamic.rs:143:5
[INFO] [stdout]     |
[INFO] [stdout] 143 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:90:17
[INFO] [stdout]     |
[INFO] [stdout]  90 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:95:17
[INFO] [stdout]     |
[INFO] [stdout]  95 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:100:17
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:105:17
[INFO] [stdout]     |
[INFO] [stdout] 105 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/binary/exponent.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |                 #[must_use]
[INFO] [stdout]     |                 ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 | impl_binary_exponent!((i32, [u8; 4]), (i64, [u8; 8]), (i128, [u8; 16]));
[INFO] [stdout]     | ----------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: this warning originates in the macro `impl_binary_exponent` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `trailing_exponent_width_bits` is never used
[INFO] [stdout]    --> src/binary/buf.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout]  34 | pub trait BinaryBuf {
[INFO] [stdout]     |           --------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 177 |     fn trailing_exponent_width_bits(&self) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i32, Infallible>
[INFO] [stdout]    --> src/num.rs:194:21
[INFO] [stdout]     |
[INFO] [stdout] 194 |                       (*self).try_into().ok()
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 268 | / impl_binary_integer!(
[INFO] [stdout] 269 | |     (i8, [u8; 1]),
[INFO] [stdout] 270 | |     (i16, [u8; 2]),
[INFO] [stdout] 271 | |     (i32, [u8; 4]),
[INFO] [stdout] 272 | |     (i64, [u8; 8]),
[INFO] [stdout] 273 | |     (i128, [u8; 16])
[INFO] [stdout] 274 | | );
[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 `impl_binary_integer` (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<i32, Infallible>
[INFO] [stdout]    --> src/num.rs:249:21
[INFO] [stdout]     |
[INFO] [stdout] 249 |                       (*self).try_into().ok()
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 275 | / impl_binary_unsigned_integer!(
[INFO] [stdout] 276 | |     (u8, [u8; 1]),
[INFO] [stdout] 277 | |     (u16, [u8; 2]),
[INFO] [stdout] 278 | |     (u32, [u8; 4]),
[INFO] [stdout] 279 | |     (u64, [u8; 8]),
[INFO] [stdout] 280 | |     (u128, [u8; 16])
[INFO] [stdout] 281 | | );
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `impl_binary_unsigned_integer` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `decstr` (lib) due to 2 previous errors; 13 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "085e4a58348d3123e3a30c08acfee9c02a95aada4499d6f2b4e60290bff671d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "085e4a58348d3123e3a30c08acfee9c02a95aada4499d6f2b4e60290bff671d3", kill_on_drop: false }`
[INFO] [stdout] 085e4a58348d3123e3a30c08acfee9c02a95aada4499d6f2b4e60290bff671d3
