[INFO] cloning repository https://github.com/IndigoLily/mandelbrot.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IndigoLily/mandelbrot.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndigoLily%2Fmandelbrot.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndigoLily%2Fmandelbrot.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff7431e3518174ef10b7254618070e2faa213a81
[INFO] checking IndigoLily/mandelbrot.rs against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIndigoLily%2Fmandelbrot.rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/IndigoLily/mandelbrot.rs on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/IndigoLily/mandelbrot.rs
[INFO] finished tweaking git repo https://github.com/IndigoLily/mandelbrot.rs
[INFO] tweaked toml for git repo https://github.com/IndigoLily/mandelbrot.rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/IndigoLily/mandelbrot.rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77dd5ad2a38b38593859cd9a7bf5246d1d712a1bb3fefc1ba8908d386910b950
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "77dd5ad2a38b38593859cd9a7bf5246d1d712a1bb3fefc1ba8908d386910b950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77dd5ad2a38b38593859cd9a7bf5246d1d712a1bb3fefc1ba8908d386910b950", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77dd5ad2a38b38593859cd9a7bf5246d1d712a1bb3fefc1ba8908d386910b950", kill_on_drop: false }`
[INFO] [stdout] 77dd5ad2a38b38593859cd9a7bf5246d1d712a1bb3fefc1ba8908d386910b950
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1fb29a83fe193bf1f61b026a73afcf230b31395eb3860b383bde12a0931af4cb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1fb29a83fe193bf1f61b026a73afcf230b31395eb3860b383bde12a0931af4cb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking num-complex v0.3.0
[INFO] [stderr]     Checking num v0.3.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::f64::consts::TAU;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:197:48
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 let val = ((escape * 2.0 + t * TAU).sin() / 2.0 + 0.5).powf(2.2);
[INFO] [stdout]     |                                                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:223:45
[INFO] [stdout]     |
[INFO] [stdout] 223 |                     (escape / 2.0 * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:224:45
[INFO] [stdout]     |
[INFO] [stdout] 224 |                     (escape / 2.0 * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:225:45
[INFO] [stdout]     |
[INFO] [stdout] 225 |                     (escape / 2.0 * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:231:37
[INFO] [stdout]     |
[INFO] [stdout] 231 |                     (escape * 2.0 + TAU * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:231:51
[INFO] [stdout]     |
[INFO] [stdout] 231 |                     (escape * 2.0 + TAU * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:232:37
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     (escape * 2.0 + TAU * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:232:51
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     (escape * 2.0 + TAU * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:233:37
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     (escape * 2.0 + TAU * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:233:51
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     (escape * 2.0 + TAU * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mandelbrot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::f64::consts::TAU;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:197:48
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 let val = ((escape * 2.0 + t * TAU).sin() / 2.0 + 0.5).powf(2.2);
[INFO] [stdout]     |                                                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:223:45
[INFO] [stdout]     |
[INFO] [stdout] 223 |                     (escape / 2.0 * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:224:45
[INFO] [stdout]     |
[INFO] [stdout] 224 |                     (escape / 2.0 * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:225:45
[INFO] [stdout]     |
[INFO] [stdout] 225 |                     (escape / 2.0 * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:231:37
[INFO] [stdout]     |
[INFO] [stdout] 231 |                     (escape * 2.0 + TAU * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:231:51
[INFO] [stdout]     |
[INFO] [stdout] 231 |                     (escape * 2.0 + TAU * r + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:232:37
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     (escape * 2.0 + TAU * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:232:51
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     (escape * 2.0 + TAU * g + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:233:37
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     (escape * 2.0 + TAU * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'tau_constant'
[INFO] [stdout]    --> src/main.rs:233:51
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     (escape * 2.0 + TAU * b + t * TAU).sin() / 2.0 + 0.5,
[INFO] [stdout]     |                                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #66770 <https://github.com/rust-lang/rust/issues/66770> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 11 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1fb29a83fe193bf1f61b026a73afcf230b31395eb3860b383bde12a0931af4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fb29a83fe193bf1f61b026a73afcf230b31395eb3860b383bde12a0931af4cb", kill_on_drop: false }`
[INFO] [stdout] 1fb29a83fe193bf1f61b026a73afcf230b31395eb3860b383bde12a0931af4cb
