[INFO] cloning repository https://github.com/h3nnn4n/Mandelbrot-Explorer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/h3nnn4n/Mandelbrot-Explorer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3nnn4n%2FMandelbrot-Explorer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3nnn4n%2FMandelbrot-Explorer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3afefc326817eb4e2ea1711a9b7aa93237b14397
[INFO] testing h3nnn4n/Mandelbrot-Explorer against beta-2021-09-12 for beta-1.56-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fh3nnn4n%2FMandelbrot-Explorer" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/h3nnn4n/Mandelbrot-Explorer on toolchain beta-2021-09-12
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/h3nnn4n/Mandelbrot-Explorer
[INFO] finished tweaking git repo https://github.com/h3nnn4n/Mandelbrot-Explorer
[INFO] tweaked toml for git repo https://github.com/h3nnn4n/Mandelbrot-Explorer written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/h3nnn4n/Mandelbrot-Explorer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-12" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 648148b0b00cdd813f743d0966955d1a477c462defe7b7f0b98c9696c44cc47e
[INFO] running `Command { std: "docker" "start" "-a" "648148b0b00cdd813f743d0966955d1a477c462defe7b7f0b98c9696c44cc47e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "648148b0b00cdd813f743d0966955d1a477c462defe7b7f0b98c9696c44cc47e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "648148b0b00cdd813f743d0966955d1a477c462defe7b7f0b98c9696c44cc47e", kill_on_drop: false }`
[INFO] [stdout] 648148b0b00cdd813f743d0966955d1a477c462defe7b7f0b98c9696c44cc47e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-12" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff3fefdda2631340093c53ff02e3d000ea03429fcfe628edad85ec77644730c2
[INFO] running `Command { std: "docker" "start" "-a" "ff3fefdda2631340093c53ff02e3d000ea03429fcfe628edad85ec77644730c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.37
[INFO] [stderr]    Compiling cc v1.0.30
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling wasm-bindgen v0.2.37
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling sourcefile v0.1.4
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling humantime v1.2.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling nom v4.2.1
[INFO] [stderr]    Compiling syn v0.15.27
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling getrandom v0.1.6
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling env_logger v0.6.0
[INFO] [stderr]    Compiling num-complex v0.3.0
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling backtrace v0.3.12
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.37
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_roundings'
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:198:10
[INFO] [stdout]     |
[INFO] [stdout] 198 |         .div_ceil(&big_digit::BITS.into())
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #88581 <https://github.com/rust-lang/rust/issues/88581> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:198:19
[INFO] [stdout]     |
[INFO] [stdout] 198 |         .div_ceil(&big_digit::BITS.into())
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^ expected `u64`, found reference
[INFO] [stdout]     |
[INFO] [stdout]     = note:   expected type `u64`
[INFO] [stdout]             found reference `&_`
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]     |
[INFO] [stdout] 198 -         .div_ceil(&big_digit::BITS.into())
[INFO] [stdout] 198 +         .div_ceil(big_digit::BITS.into())
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_roundings'
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:1700:41
[INFO] [stdout]      |
[INFO] [stdout] 1700 |             let root_scale = extra_bits.div_ceil(&n64);
[INFO] [stdout]      |                                         ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #88581 <https://github.com/rust-lang/rust/issues/88581> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:1700:50
[INFO] [stdout]      |
[INFO] [stdout] 1700 |             let root_scale = extra_bits.div_ceil(&n64);
[INFO] [stdout]      |                                                  ^^^^ expected `u64`, found `&u64`
[INFO] [stdout]      |
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]      |
[INFO] [stdout] 1700 -             let root_scale = extra_bits.div_ceil(&n64);
[INFO] [stdout] 1700 +             let root_scale = extra_bits.div_ceil(n64);
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_roundings'
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:2119:10
[INFO] [stdout]      |
[INFO] [stdout] 2119 |         .div_ceil(&u64::from(bits))
[INFO] [stdout]      |          ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #88581 <https://github.com/rust-lang/rust/issues/88581> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:2119:19
[INFO] [stdout]      |
[INFO] [stdout] 2119 |         .div_ceil(&u64::from(bits))
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^ expected `u64`, found `&u64`
[INFO] [stdout]      |
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]      |
[INFO] [stdout] 2119 -         .div_ceil(&u64::from(bits))
[INFO] [stdout] 2119 +         .div_ceil(u64::from(bits))
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_roundings'
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:2147:10
[INFO] [stdout]      |
[INFO] [stdout] 2147 |         .div_ceil(&u64::from(bits))
[INFO] [stdout]      |          ^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #88581 <https://github.com/rust-lang/rust/issues/88581> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/num-bigint-0.3.0/src/biguint.rs:2147:19
[INFO] [stdout]      |
[INFO] [stdout] 2147 |         .div_ceil(&u64::from(bits))
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^ expected `u64`, found `&u64`
[INFO] [stdout]      |
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]      |
[INFO] [stdout] 2147 -         .div_ceil(&u64::from(bits))
[INFO] [stdout] 2147 +         .div_ceil(u64::from(bits))
[INFO] [stdout]      | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `num-bigint` due to 9 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ff3fefdda2631340093c53ff02e3d000ea03429fcfe628edad85ec77644730c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3fefdda2631340093c53ff02e3d000ea03429fcfe628edad85ec77644730c2", kill_on_drop: false }`
[INFO] [stdout] ff3fefdda2631340093c53ff02e3d000ea03429fcfe628edad85ec77644730c2