[INFO] fetching crate mergui 0.1.0-alpha0.8...
[INFO] checking mergui-0.1.0-alpha0.8 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate mergui 0.1.0-alpha0.8 into /workspace/builds/worker-93/source
[INFO] validating manifest of crates.io crate mergui 0.1.0-alpha0.8 on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mergui 0.1.0-alpha0.8
[INFO] finished tweaking crates.io crate mergui 0.1.0-alpha0.8
[INFO] tweaked toml for crates.io crate mergui 0.1.0-alpha0.8 written to /workspace/builds/worker-93/source/Cargo.toml
[INFO] crate crates.io crate mergui 0.1.0-alpha0.8 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-task v0.3.8
[INFO] [stderr]   Downloaded pin-project-internal v1.0.2
[INFO] [stderr]   Downloaded pin-project v1.0.2
[INFO] [stderr]   Downloaded webgl_generator v0.2.0
[INFO] [stderr]   Downloaded regex v1.4.2
[INFO] [stderr]   Downloaded string_cache v0.4.0
[INFO] [stderr]   Downloaded xml-rs v0.8.3
[INFO] [stderr]   Downloaded gl_generator v0.14.0
[INFO] [stderr]   Downloaded futures-executor v0.3.8
[INFO] [stderr]   Downloaded glutin_gles2_sys v0.1.5
[INFO] [stderr]   Downloaded glutin_glx_sys v0.1.7
[INFO] [stderr]   Downloaded serde_json v1.0.59
[INFO] [stderr]   Downloaded indexmap v1.6.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.68
[INFO] [stderr]   Downloaded ahash v0.3.8
[INFO] [stderr]   Downloaded syn v1.0.52
[INFO] [stderr]   Downloaded docopt v1.1.0
[INFO] [stderr]   Downloaded blinds v0.1.6
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.1
[INFO] [stderr]   Downloaded encoding-index-japanese v1.20141219.5
[INFO] [stderr]   Downloaded getrandom v0.1.15
[INFO] [stderr]   Downloaded glutin_emscripten_sys v0.1.1
[INFO] [stderr]   Downloaded glutin_egl_sys v0.1.5
[INFO] [stderr]   Downloaded glutin_wgl_sys v0.1.5
[INFO] [stderr]   Downloaded unicode-normalization v0.1.16
[INFO] [stderr]   Downloaded gl_generator v0.13.1
[INFO] [stderr]   Downloaded libc v0.2.80
[INFO] [stderr]   Downloaded html5ever-atoms v0.2.2
[INFO] [stderr]   Downloaded webidl v0.8.0
[INFO] [stderr]   Downloaded encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]   Downloaded slotmap v0.3.0
[INFO] [stderr]   Downloaded futures-util v0.3.8
[INFO] [stderr]   Downloaded html5ever v0.13.1
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[INFO] [stderr]   Downloaded khronos_api v3.1.0
[INFO] [stderr]   Downloaded utf-8 v0.6.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.21
[INFO] [stderr]   Downloaded gestalt v0.1.0
[INFO] [stderr]   Downloaded ena v0.11.0
[INFO] [stderr]   Downloaded cgl v0.3.2
[INFO] [stderr]   Downloaded platter v0.1.4
[INFO] [stderr]   Downloaded golem v0.1.7
[INFO] [stderr]   Downloaded png v0.15.3
[INFO] [stderr]   Downloaded serde_derive v1.0.117
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded glow v0.4.0
[INFO] [stderr]   Downloaded tinyvec v1.1.0
[INFO] [stderr]   Downloaded webgl_stdweb v0.3.0
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.68
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded html2runes v1.0.1
[INFO] [stderr]   Downloaded serde v1.0.117
[INFO] [stderr]   Downloaded hermit-abi v0.1.17
[INFO] [stderr]   Downloaded quicksilver v0.4.0
[INFO] [stderr]   Downloaded ordered-float v1.1.0
[INFO] [stderr]   Downloaded lalrpop v0.16.3
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.68
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.68
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.68
[INFO] [stderr]   Downloaded glutin v0.24.1
[INFO] [stderr]   Downloaded elefont v0.1.3
[INFO] [stderr]   Downloaded rusttype v0.8.3
[INFO] [stderr]   Downloaded core-graphics v0.19.2
[INFO] [stderr]   Downloaded osmesa-sys v0.1.2
[INFO] [stderr]   Downloaded cocoa v0.20.2
[INFO] [stderr]   Downloaded smallvec v1.5.0
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[INFO] [stderr]   Downloaded cc v1.0.65
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[INFO] [stderr]   Downloaded hashbrown v0.7.2
[INFO] [stderr]   Downloaded RustyXML v0.1.1
[INFO] [stderr]   Downloaded tendril v0.2.4
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[INFO] [stderr]   Downloaded string_cache_codegen v0.3.1
[INFO] [stderr]   Downloaded encoding-index-korean v1.20141219.5
[INFO] [stderr]   Downloaded encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]   Downloaded encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]   Downloaded encoding_index_tests v0.1.4
[INFO] [stderr]   Downloaded encoding v0.2.33
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[INFO] [stderr]   Downloaded lalrpop-util v0.16.3
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[INFO] [stderr]   Downloaded futures-core v0.3.8
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ede421aaabd74125bb701c73dce4a293c70b195f0a9cd315ef8ac46e874d716
[INFO] running `Command { std: "docker" "start" "-a" "6ede421aaabd74125bb701c73dce4a293c70b195f0a9cd315ef8ac46e874d716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ede421aaabd74125bb701c73dce4a293c70b195f0a9cd315ef8ac46e874d716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ede421aaabd74125bb701c73dce4a293c70b195f0a9cd315ef8ac46e874d716", kill_on_drop: false }`
[INFO] [stdout] 6ede421aaabd74125bb701c73dce4a293c70b195f0a9cd315ef8ac46e874d716
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b65c851078cc79ba14fadbe7ae57947a54aa8931314658867ce9b42e45a1a6db
[INFO] running `Command { std: "docker" "start" "-a" "b65c851078cc79ba14fadbe7ae57947a54aa8931314658867ce9b42e45a1a6db", kill_on_drop: false }`
[INFO] [stderr] error: failed to create jobserver
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to increase jobserver pipe capacity from 4096 to 8192; jobserver otherwise might deadlock
[INFO] running `Command { std: "docker" "inspect" "b65c851078cc79ba14fadbe7ae57947a54aa8931314658867ce9b42e45a1a6db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b65c851078cc79ba14fadbe7ae57947a54aa8931314658867ce9b42e45a1a6db", kill_on_drop: false }`
[INFO] [stdout] b65c851078cc79ba14fadbe7ae57947a54aa8931314658867ce9b42e45a1a6db