[INFO] cloning repository https://github.com/badnames/mandelrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/badnames/mandelrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadnames%2Fmandelrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadnames%2Fmandelrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b46c9d33db7a7cf402eb7b0bbfbd433a1075191a
[INFO] checking badnames/mandelrust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadnames%2Fmandelrust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/badnames/mandelrust on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/badnames/mandelrust
[INFO] finished tweaking git repo https://github.com/badnames/mandelrust
[INFO] tweaked toml for git repo https://github.com/badnames/mandelrust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/badnames/mandelrust 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git submodule `https://github.com/KhronosGroup/OpenGL-Registry.git`
[INFO] [stderr]     Updating git submodule `https://github.com/KhronosGroup/EGL-Registry.git`
[INFO] [stderr]     Updating git submodule `https://github.com/KhronosGroup/WebGL.git`
[INFO] [stderr]     Updating git submodule `https://github.com/KhronosGroup/WebGLDeveloperTools.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded log v0.4.4
[INFO] [stderr]   Downloaded num_cpus v0.2.13
[INFO] [stderr]   Downloaded phf v0.7.23
[INFO] [stderr]   Downloaded num-derive v0.2.2
[INFO] [stderr]   Downloaded inflate v0.4.3
[INFO] [stderr]   Downloaded phf_codegen v0.7.23
[INFO] [stderr]   Downloaded num-complex v0.2.0
[INFO] [stderr]   Downloaded byteorder v1.2.6
[INFO] [stderr]   Downloaded quote v0.6.8
[INFO] [stderr]   Downloaded gif v0.10.0
[INFO] [stderr]   Downloaded palette v0.4.1
[INFO] [stderr]   Downloaded argparse v0.2.1
[INFO] [stderr]   Downloaded rayon v1.0.2
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] [stderr]   Downloaded proc-macro2 v0.4.15
[INFO] [stderr]   Downloaded palette_derive v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0cd8e3fb4ac30c8ed5cf80851ab5b0b6e0307bf4559796ebe005503a7931579
[INFO] running `Command { std: "docker" "start" "-a" "d0cd8e3fb4ac30c8ed5cf80851ab5b0b6e0307bf4559796ebe005503a7931579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0cd8e3fb4ac30c8ed5cf80851ab5b0b6e0307bf4559796ebe005503a7931579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0cd8e3fb4ac30c8ed5cf80851ab5b0b6e0307bf4559796ebe005503a7931579", kill_on_drop: false }`
[INFO] [stdout] d0cd8e3fb4ac30c8ed5cf80851ab5b0b6e0307bf4559796ebe005503a7931579
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ada6c836e036cdb170314e1f11edb8471edeb7a16d8a1c39d1acacbfc0df14b
[INFO] running `Command { std: "docker" "start" "-a" "8ada6c836e036cdb170314e1f11edb8471edeb7a16d8a1c39d1acacbfc0df14b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling khronos_api v2.2.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking argparse v0.2.1
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]    Compiling gl_generator v0.9.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling gl v0.10.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking sdl2 v0.31.0
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking mandelbrot_renderer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.98s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "8ada6c836e036cdb170314e1f11edb8471edeb7a16d8a1c39d1acacbfc0df14b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ada6c836e036cdb170314e1f11edb8471edeb7a16d8a1c39d1acacbfc0df14b", kill_on_drop: false }`
[INFO] [stdout] 8ada6c836e036cdb170314e1f11edb8471edeb7a16d8a1c39d1acacbfc0df14b
[INFO] checking badnames/mandelrust against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadnames%2Fmandelrust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/badnames/mandelrust on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/badnames/mandelrust
[INFO] finished tweaking git repo https://github.com/badnames/mandelrust
[INFO] tweaked toml for git repo https://github.com/badnames/mandelrust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/badnames/mandelrust 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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_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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cfe56006f56123f8dafe15f6bf59a74f9320ebc6df2040e2fbd8b67f61374ae
[INFO] running `Command { std: "docker" "start" "-a" "0cfe56006f56123f8dafe15f6bf59a74f9320ebc6df2040e2fbd8b67f61374ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cfe56006f56123f8dafe15f6bf59a74f9320ebc6df2040e2fbd8b67f61374ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cfe56006f56123f8dafe15f6bf59a74f9320ebc6df2040e2fbd8b67f61374ae", kill_on_drop: false }`
[INFO] [stdout] 0cfe56006f56123f8dafe15f6bf59a74f9320ebc6df2040e2fbd8b67f61374ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f116a4aad436a543c2d754171c1a3a7216575b9c7d789228634cb4cc26a62cfe
[INFO] running `Command { std: "docker" "start" "-a" "f116a4aad436a543c2d754171c1a3a7216575b9c7d789228634cb4cc26a62cfe", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling khronos_api v2.2.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling log v0.4.4
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]    Compiling xml-rs v0.7.0
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking argparse v0.2.1
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling gl_generator v0.9.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking sdl2 v0.31.0
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling gl v0.10.0 (https://github.com/bjz/gl-rs#a24afae9)
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling palette_derive v0.4.1
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking mandelbrot_renderer v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.68s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: syn v0.14.9
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "f116a4aad436a543c2d754171c1a3a7216575b9c7d789228634cb4cc26a62cfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f116a4aad436a543c2d754171c1a3a7216575b9c7d789228634cb4cc26a62cfe", kill_on_drop: false }`
[INFO] [stdout] f116a4aad436a543c2d754171c1a3a7216575b9c7d789228634cb4cc26a62cfe