[INFO] fetching crate mtots 0.1.2...
[INFO] testing mtots-0.1.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate mtots 0.1.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate mtots 0.1.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mtots 0.1.2
[INFO] finished tweaking crates.io crate mtots 0.1.2
[INFO] tweaked toml for crates.io crate mtots 0.1.2 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate mtots 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded malloc_buf v0.0.6
[INFO] [stderr]   Downloaded rusttype v0.7.9
[INFO] [stderr]   Downloaded line_drawing v0.7.0
[INFO] [stderr]   Downloaded minimp3 v0.3.5
[INFO] [stderr]   Downloaded libloading v0.6.2
[INFO] [stderr]   Downloaded slice-deque v0.3.0
[INFO] [stderr]   Downloaded cpal v0.8.2
[INFO] [stderr]   Downloaded android_glue v0.2.3
[INFO] [stderr]   Downloaded khronos_api v3.1.0
[INFO] [stderr]   Downloaded shared_library v0.1.9
[INFO] [stderr]   Downloaded glutin v0.20.1
[INFO] [stderr]   Downloaded addr2line v0.13.0
[INFO] [stderr]   Downloaded block v0.1.6
[INFO] [stderr]   Downloaded wayland-protocols v0.21.13
[INFO] [stderr]   Downloaded minimp3-sys v0.3.2
[INFO] [stderr]   Downloaded png v0.15.3
[INFO] [stderr]   Downloaded glutin_wgl_sys v0.1.4
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.4
[INFO] [stderr]   Downloaded draw_state v0.8.0
[INFO] [stderr]   Downloaded gfx v0.18.2
[INFO] [stderr]   Downloaded gfx_gl v0.6.1
[INFO] [stderr]   Downloaded rayon v1.3.1
[INFO] [stderr]   Downloaded rayon-core v1.7.1
[INFO] [stderr]   Downloaded cgl v0.2.3
[INFO] [stderr]   Downloaded ordered-float v1.1.0
[INFO] [stderr]   Downloaded backtrace v0.3.50
[INFO] [stderr]   Downloaded ogg v0.7.0
[INFO] [stderr]   Downloaded mint v0.5.5
[INFO] [stderr]   Downloaded wayland-commons v0.21.13
[INFO] [stderr]   Downloaded io-kit-sys v0.1.0
[INFO] [stderr]   Downloaded num-derive v0.2.5
[INFO] [stderr]   Downloaded tiff v0.3.1
[INFO] [stderr]   Downloaded libudev-sys v0.1.4
[INFO] [stderr]   Downloaded gfx_core v0.9.2
[INFO] [stderr]   Downloaded gl_generator v0.14.0
[INFO] [stderr]   Downloaded gl_generator v0.13.1
[INFO] [stderr]   Downloaded deflate v0.7.20
[INFO] [stderr]   Downloaded podio v0.1.7
[INFO] [stderr]   Downloaded claxon v0.4.2
[INFO] [stderr]   Downloaded lyon_geom v0.12.7
[INFO] [stderr]   Downloaded euclid v0.19.9
[INFO] [stderr]   Downloaded lyon v0.13.5
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded glyph_brush_layout v0.1.9
[INFO] [stderr]   Downloaded xdg v2.2.0
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.4.6
[INFO] [stderr]   Downloaded gfx_window_glutin v0.30.0
[INFO] [stderr]   Downloaded glutin_gles2_sys v0.1.4
[INFO] [stderr]   Downloaded lyon_path v0.13.2
[INFO] [stderr]   Downloaded wayland-client v0.21.13
[INFO] [stderr]   Downloaded xi-unicode v0.2.1
[INFO] [stderr]   Downloaded bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]   Downloaded gilrs-core v0.2.6
[INFO] [stderr]   Downloaded x11-dl v2.18.5
[INFO] [stderr]   Downloaded lyon_algorithms v0.13.4
[INFO] [stderr]   Downloaded directories v2.0.2
[INFO] [stderr]   Downloaded mach v0.2.3
[INFO] [stderr]   Downloaded gleam v0.6.19
[INFO] [stderr]   Downloaded sid v0.5.2
[INFO] [stderr]   Downloaded smart-default v0.5.2
[INFO] [stderr]   Downloaded gif v0.10.3
[INFO] [stderr]   Downloaded ggez v0.5.1
[INFO] [stderr]   Downloaded zip v0.5.6
[INFO] [stderr]   Downloaded clang-sys v0.29.3
[INFO] [stderr]   Downloaded nix v0.14.1
[INFO] [stderr]   Downloaded lyon_tessellation v0.13.5
[INFO] [stderr]   Downloaded stb_truetype v0.3.1
[INFO] [stderr]   Downloaded rusttype v0.8.3
[INFO] [stderr]   Downloaded jpeg-decoder v0.1.20
[INFO] [stderr]   Downloaded image v0.23.8
[INFO] [stderr]   Downloaded pkg-config v0.3.18
[INFO] [stderr]   Downloaded objc v0.2.7
[INFO] [stderr]   Downloaded bytemuck v1.3.1
[INFO] [stderr]   Downloaded dlib v0.4.2
[INFO] [stderr]   Downloaded bindgen v0.53.3
[INFO] [stderr]   Downloaded tiff v0.5.0
[INFO] [stderr]   Downloaded twox-hash v1.5.0
[INFO] [stderr]   Downloaded png v0.16.7
[INFO] [stderr]   Downloaded gfx_device_gl v0.16.2
[INFO] [stderr]   Downloaded cc v1.0.54
[INFO] [stderr]   Downloaded mtots_core v0.1.2
[INFO] [stderr]   Downloaded glyph_brush v0.6.3
[INFO] [stderr]   Downloaded osmesa-sys v0.1.2
[INFO] [stderr]   Downloaded euclid_macros v0.1.0
[INFO] [stderr]   Downloaded core-foundation-sys v0.5.1
[INFO] [stderr]   Downloaded image v0.22.5
[INFO] [stderr]   Downloaded coreaudio-sys v0.2.5
[INFO] [stderr]   Downloaded winit v0.19.5
[INFO] [stderr]   Downloaded deflate v0.8.6
[INFO] [stderr]   Downloaded gimli v0.22.0
[INFO] [stderr]   Downloaded wayland-scanner v0.21.13
[INFO] [stderr]   Downloaded wayland-sys v0.21.13
[INFO] [stderr]   Downloaded raw-window-handle v0.3.3
[INFO] [stderr]   Downloaded num-iter v0.1.41
[INFO] [stderr]   Downloaded lzw v0.10.0
[INFO] [stderr]   Downloaded glyph_brush v0.5.4
[INFO] [stderr]   Downloaded cocoa v0.18.5
[INFO] [stderr]   Downloaded lewton v0.9.4
[INFO] [stderr]   Downloaded core-graphics v0.17.3
[INFO] [stderr]   Downloaded color_quant v1.0.1
[INFO] [stderr]   Downloaded gilrs v0.7.4
[INFO] [stderr]   Downloaded num-rational v0.3.0
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.6
[INFO] [stderr]   Downloaded andrew v0.2.1
[INFO] [stderr]   Downloaded rusty-xinput v1.2.0
[INFO] [stderr]   Downloaded rodio v0.9.0
[INFO] [stderr]   Downloaded alsa-sys v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2161f87bc1ec6ad570bccf76cdd0524c00300e65aa84d0ed3d619042b4336fd2
[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" "2161f87bc1ec6ad570bccf76cdd0524c00300e65aa84d0ed3d619042b4336fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2161f87bc1ec6ad570bccf76cdd0524c00300e65aa84d0ed3d619042b4336fd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2161f87bc1ec6ad570bccf76cdd0524c00300e65aa84d0ed3d619042b4336fd2", kill_on_drop: false }`
[INFO] [stdout] 2161f87bc1ec6ad570bccf76cdd0524c00300e65aa84d0ed3d619042b4336fd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 260d4fc1ad50c47d6d324335f25d42d26a19d5826c4041fcb6a9cf702975afdf
[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" "260d4fc1ad50c47d6d324335f25d42d26a19d5826c4041fcb6a9cf702975afdf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling libloading v0.6.2
[INFO] [stderr]    Compiling either v1.6.0
[INFO] [stderr]    Compiling xi-unicode v0.2.1
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling mint v0.5.5
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling podio v0.1.7
[INFO] [stderr]    Compiling xref v0.1.1
[INFO] [stderr]    Compiling bytemuck v1.3.1
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling minimp3-sys v0.3.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling gif v0.10.3
[INFO] [stderr]    Compiling draw_state v0.8.0
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling stb_truetype v0.3.1
[INFO] [stderr]    Compiling tiff v0.5.0
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling lewton v0.9.4
[INFO] [stderr]    Compiling png v0.16.7
[INFO] [stderr]    Compiling gfx_core v0.9.2
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling dlib v0.4.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling wayland-sys v0.21.13
[INFO] [stderr]    Compiling gfx v0.18.2
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.1.0
[INFO] [stderr]    Compiling line_drawing v0.7.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling raw-window-handle v0.3.3
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling slice-deque v0.3.0
[INFO] [stderr]    Compiling dirs-sys-next v0.1.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling gfx_gl v0.6.1
[INFO] [stderr]    Compiling sid v0.5.2
[INFO] [stderr]    Compiling rusttype v0.8.3
[INFO] [stderr]    Compiling rayon-core v1.7.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.4
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.6
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.44/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=9df0a0b78d26131a -C extra-filename=-9df0a0b78d26131a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-8f6fa10a3a7979c3.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-1404a83f3aa5c70e.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-f8061977f7601210.rmeta --cap-lints allow --cap-lints=warn --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "260d4fc1ad50c47d6d324335f25d42d26a19d5826c4041fcb6a9cf702975afdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "260d4fc1ad50c47d6d324335f25d42d26a19d5826c4041fcb6a9cf702975afdf", kill_on_drop: false }`
[INFO] [stdout] 260d4fc1ad50c47d6d324335f25d42d26a19d5826c4041fcb6a9cf702975afdf