[INFO] crate exact-float 0.1.1 is already in cache
[INFO] testing exact-float-0.1.1 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate exact-float 0.1.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate exact-float 0.1.1 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate exact-float 0.1.1
[INFO] finished tweaking crates.io crate exact-float 0.1.1
[INFO] tweaked toml for crates.io crate exact-float 0.1.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stdout] a3742c1af74b973c33c274b6b3151efbf3823aadf20de670f2731fbbe8d494ba
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "a3742c1af74b973c33c274b6b3151efbf3823aadf20de670f2731fbbe8d494ba"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling exact-float v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(float_extras)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `integer_decode` found for type `f32` in the current scope
[INFO] [stderr]   --> src/lib.rs:57:47
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let (mantissa, exponent, sign) = self.integer_decode();
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^ method not found in `f32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
[INFO] [stderr]    |
[INFO] [stderr] 4  | use core::num::dec2flt::rawfp::RawFloat;
[INFO] [stderr]    |
[INFO] [stderr] 4  | use num::traits::float::FloatCore;
[INFO] [stderr]    |
[INFO] [stderr] 4  | use num::Float;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `integer_decode` found for type `f64` in the current scope
[INFO] [stderr]   --> src/lib.rs:73:47
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let (mantissa, exponent, sign) = self.integer_decode();
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^ method not found in `f64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following traits are implemented but not in scope; perhaps add a `use` for one of them:
[INFO] [stderr]    |
[INFO] [stderr] 4  | use core::num::dec2flt::rawfp::RawFloat;
[INFO] [stderr]    |
[INFO] [stderr] 4  | use num::traits::float::FloatCore;
[INFO] [stderr]    |
[INFO] [stderr] 4  | use num::Float;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `exact-float`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a3742c1af74b973c33c274b6b3151efbf3823aadf20de670f2731fbbe8d494ba"`
[INFO] running `"docker" "rm" "-f" "a3742c1af74b973c33c274b6b3151efbf3823aadf20de670f2731fbbe8d494ba"`
[INFO] [stdout] a3742c1af74b973c33c274b6b3151efbf3823aadf20de670f2731fbbe8d494ba