[INFO] fetching crate exact-conv 0.2.1...
[INFO] checking exact-conv-0.2.1 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate exact-conv 0.2.1 into /workspace/builds/worker-5-tc1/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-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate exact-conv 0.2.1 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9983f86c804692c1f175947d6e0e7f177a1e8fe95f5865d1783089d3eff34371
[INFO] running `Command { std: "docker" "start" "-a" "9983f86c804692c1f175947d6e0e7f177a1e8fe95f5865d1783089d3eff34371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9983f86c804692c1f175947d6e0e7f177a1e8fe95f5865d1783089d3eff34371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9983f86c804692c1f175947d6e0e7f177a1e8fe95f5865d1783089d3eff34371", kill_on_drop: false }`
[INFO] [stdout] 9983f86c804692c1f175947d6e0e7f177a1e8fe95f5865d1783089d3eff34371
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 132c1a1ee2122547d942e663551c1f3a295fbc802e71131040bb14b11ef88198
[INFO] running `Command { std: "docker" "start" "-a" "132c1a1ee2122547d942e663551c1f3a295fbc802e71131040bb14b11ef88198", kill_on_drop: false }`
[INFO] [stderr]     Checking exact-conv v0.2.1 (/opt/rustwide/workdir)
[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 0.23s
[INFO] running `Command { std: "docker" "inspect" "132c1a1ee2122547d942e663551c1f3a295fbc802e71131040bb14b11ef88198", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "132c1a1ee2122547d942e663551c1f3a295fbc802e71131040bb14b11ef88198", kill_on_drop: false }`
[INFO] [stdout] 132c1a1ee2122547d942e663551c1f3a295fbc802e71131040bb14b11ef88198