[INFO] fetching crate exact-conv 0.2.1...
[INFO] checking exact-conv-0.2.1 against try#38c2997544af84fe301d600d6896397738163002 for pr-154205-1
[INFO] extracting crate exact-conv 0.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate exact-conv 0.2.1
[INFO] finished tweaking crates.io crate exact-conv 0.2.1
[INFO] tweaked toml for crates.io crate exact-conv 0.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate exact-conv 0.2.1 on toolchain 38c2997544af84fe301d600d6896397738163002
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate exact-conv 0.2.1 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" "+38c2997544af84fe301d600d6896397738163002" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
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[INFO] [stdout] 21d5b09bc1d1c6cc4a398edb0dd92ca42cb3d6114cbe5e43895a5ffe2975a75e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94799c5f67f00641fdad0a30c9ead34808f4c3cad9724151847103a528173dbe
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[INFO] [stderr]     Checking exact-conv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:35:8","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:41:13","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:42:13","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:45:8","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:51:13","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:52:13","p":2,"ph":1,"wa":0,"pa":0,"a":1,"pos":1,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":1,"a_opt":1,"sz_no_dedup":16,"sz_old":16,"sz_opt":16}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"/rustc/38c2997544af84fe301d600d6896397738163002/library/std/src/macros.rs:140:23","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:55:13","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"/rustc/38c2997544af84fe301d600d6896397738163002/library/std/src/macros.rs:140:23","p":1,"ph":0,"wa":0,"pa":0,"a":0,"pos":0,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":0,"a_opt":0,"sz_no_dedup":0,"sz_old":0,"sz_opt":0}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:10:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:10:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:10:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:10:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:10:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:24:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:24:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:24:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:24:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stderr] [FMTARGS] {"crate":"ieee754","loc":"examples/ieee754.rs:24:12","p":5,"ph":4,"wa":0,"pa":0,"a":4,"pos":4,"named":0,"cap":0,"ucap":0,"dup":0,"const":0,"constparam":0,"other_dup":0,"d2":0,"d3":0,"d4p":0,"deduped":0,"remaining":0,"a_old":4,"a_opt":4,"sz_no_dedup":64,"sz_old":64,"sz_opt":64}
[INFO] [stdout] warning: the feature `int_bits_const` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> examples/ieee754.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_bits_const)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         f32::BITS,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 36 -         f32::BITS,
[INFO] [stdout] 36 +         <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |         f64::BITS,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 46 -         f64::BITS,
[INFO] [stdout] 46 +         <f64 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f64::<impl f64>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     float_to_unsigned_int_limits!(f32 => u8);
[INFO] [stdout]    |     ---------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_unsigned_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 11 -             <$F>::BITS,
[INFO] [stdout] 11 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     float_to_unsigned_int_limits!(f32 => u16);
[INFO] [stdout]    |     ----------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_unsigned_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 11 -             <$F>::BITS,
[INFO] [stdout] 11 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     float_to_unsigned_int_limits!(f32 => u32);
[INFO] [stdout]    |     ----------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_unsigned_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 11 -             <$F>::BITS,
[INFO] [stdout] 11 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     float_to_unsigned_int_limits!(f32 => u64);
[INFO] [stdout]    |     ----------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_unsigned_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 11 -             <$F>::BITS,
[INFO] [stdout] 11 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     float_to_unsigned_int_limits!(f32 => u128);
[INFO] [stdout]    |     ------------------------------------------ in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_unsigned_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 11 -             <$F>::BITS,
[INFO] [stdout] 11 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     float_to_signed_int_limits!(f32 => i8);
[INFO] [stdout]    |     -------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_signed_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 25 -             <$F>::BITS,
[INFO] [stdout] 25 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     float_to_signed_int_limits!(f32 => i16);
[INFO] [stdout]    |     --------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_signed_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 25 -             <$F>::BITS,
[INFO] [stdout] 25 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     float_to_signed_int_limits!(f32 => i32);
[INFO] [stdout]    |     --------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_signed_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 25 -             <$F>::BITS,
[INFO] [stdout] 25 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     float_to_signed_int_limits!(f32 => i64);
[INFO] [stdout]    |     --------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_signed_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 25 -             <$F>::BITS,
[INFO] [stdout] 25 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated constant with this name may be added to the standard library in the future
[INFO] [stdout]   --> examples/ieee754.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             <$F>::BITS,
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     float_to_signed_int_limits!(f32 => i128);
[INFO] [stdout]    |     ---------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: this warning originates in the macro `float_to_signed_int_limits` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: use the fully qualified path to the associated const
[INFO] [stdout]    |
[INFO] [stdout] 25 -             <$F>::BITS,
[INFO] [stdout] 25 +             <f32 as exact_conv::IEEE754>::BITS,
[INFO] [stdout]    |
[INFO] [stdout] help: add `#![feature(float_bits_const)]` to the crate attributes to enable `core::f32::<impl f32>::BITS`
[INFO] [stdout]    |
[INFO] [stdout]  3 + #![feature(float_bits_const)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "94799c5f67f00641fdad0a30c9ead34808f4c3cad9724151847103a528173dbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94799c5f67f00641fdad0a30c9ead34808f4c3cad9724151847103a528173dbe", kill_on_drop: false }`
[INFO] [stdout] 94799c5f67f00641fdad0a30c9ead34808f4c3cad9724151847103a528173dbe