[INFO] fetching crate tether 0.3.5...
[INFO] checking tether-0.3.5 against master#46424fb5054f211ec836c5c03159f92e46bb35ac for pr-139042
[INFO] extracting crate tether 0.3.5 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate tether 0.3.5 on toolchain 46424fb5054f211ec836c5c03159f92e46bb35ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tether 0.3.5
[INFO] finished tweaking crates.io crate tether 0.3.5
[INFO] tweaked toml for crates.io crate tether 0.3.5 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate tether 0.3.5 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" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "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 proc-macro2 v0.4.29
[INFO] [stderr]   Downloaded bindgen v0.49.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc877fb3db89271e5bfdf954d4e573a33c888899865d480d669c1fb423d57ef8
[INFO] running `Command { std: "docker" "start" "-a" "dc877fb3db89271e5bfdf954d4e573a33c888899865d480d669c1fb423d57ef8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc877fb3db89271e5bfdf954d4e573a33c888899865d480d669c1fb423d57ef8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc877fb3db89271e5bfdf954d4e573a33c888899865d480d669c1fb423d57ef8", kill_on_drop: false }`
[INFO] [stdout] dc877fb3db89271e5bfdf954d4e573a33c888899865d480d669c1fb423d57ef8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+46424fb5054f211ec836c5c03159f92e46bb35ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1c55a4c2b7d6e11c7b75ef020cace27f15fb6cd9418676ff46a78d51fd5c0f6
[INFO] running `Command { std: "docker" "start" "-a" "b1c55a4c2b7d6e11c7b75ef020cace27f15fb6cd9418676ff46a78d51fd5c0f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling libc v0.2.53
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.29
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling humantime v1.2.0
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling bindgen v0.49.0
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling termcolor v1.0.4
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling clang-sys v0.28.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling cexpr v0.3.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling tether v0.3.5 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `tether v0.3.5 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/tether-120da8749454229e/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rustc-link-search=native=/usr/lib/x86_64-linux-gnu
[INFO] [stderr]   cargo:rustc-link-lib=gtk-3
[INFO] [stderr]   cargo:rustc-link-lib=gdk-3
[INFO] [stderr]   cargo:rustc-link-lib=z
[INFO] [stderr]   cargo:rustc-link-lib=pangocairo-1.0
[INFO] [stderr]   cargo:rustc-link-lib=pango-1.0
[INFO] [stderr]   cargo:rustc-link-lib=harfbuzz
[INFO] [stderr]   cargo:rustc-link-lib=atk-1.0
[INFO] [stderr]   cargo:rustc-link-lib=cairo-gobject
[INFO] [stderr]   cargo:rustc-link-lib=cairo
[INFO] [stderr]   cargo:rustc-link-lib=gdk_pixbuf-2.0
[INFO] [stderr]   cargo:rustc-link-lib=gio-2.0
[INFO] [stderr]   cargo:rustc-link-lib=gobject-2.0
[INFO] [stderr]   cargo:rustc-link-lib=glib-2.0
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Failure { command: "PKG_CONFIG_ALLOW_SYSTEM_LIBS=\"1\" \"pkg-config\" \"--libs\" \"--cflags\" \"webkit2gtk-4.0 >= 2.22\"", output: Output { status: ExitStatus(unix_wait_status(256)), stdout: "", stderr: "Package webkit2gtk-4.0 was not found in the pkg-config search path.\nPerhaps you should add the directory containing `webkit2gtk-4.0.pc'\nto the PKG_CONFIG_PATH environment variable\nPackage 'webkit2gtk-4.0', required by 'virtual:world', not found\n" } }
[INFO] running `Command { std: "docker" "inspect" "b1c55a4c2b7d6e11c7b75ef020cace27f15fb6cd9418676ff46a78d51fd5c0f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1c55a4c2b7d6e11c7b75ef020cace27f15fb6cd9418676ff46a78d51fd5c0f6", kill_on_drop: false }`
[INFO] [stdout] b1c55a4c2b7d6e11c7b75ef020cace27f15fb6cd9418676ff46a78d51fd5c0f6