/b/s/w/ir/k/buildtools/gn gen /b/s/w/ir/k/out/arm64 --check '--args=target_cpu="arm64" is_debug=true gocache_dir="/b/s/w/ir/cache/go" import("//topaz/boards/arm64.gni")  fuchsia_packages+=["//topaz/bundles:buildbot"] import("//products/core.gni")  select_variant=["profile"] use_goma=true goma_dir="/b/s/w/ir/cache/goma/client"' '--tracelog=/b/s/w/ir/k/recipe_cleanup/gn_trace.json'
in dir /b/s/w/ir/k:
 allow_subannotations: False
 cmd: ['/b/s/w/ir/k/buildtools/gn',
 'gen',
 '/b/s/w/ir/k/out/arm64',
 '--check',
 '--args=target_cpu="arm64" is_debug=true gocache_dir="/b/s/w/ir/cache/go" import("//topaz/boards/arm64.gni")  fuchsia_packages+=["//topaz/bundles:buildbot"] import("//products/core.gni")  select_variant=["profile"] use_goma=true goma_dir="/b/s/w/ir/cache/goma/client"',
 '--tracelog=/b/s/w/ir/k/recipe_cleanup/gn_trace.json']
 env: {}
 env_prefixes: {}
 env_suffixes: {}
 infra_step: False
 name_tokens: ('build', 'build fuchsia', 'gn gen')
 ok_ret: frozenset([0])
 trigger_specs: ()
full environment:
 BOTO_CONFIG: /b/s/w/ir/tmp/gsutil_task/.boto
 BUILDBUCKET_EXPERIMENTAL: FALSE
 CIPD_CACHE_DIR: /b/s/cipd_cache/cache
 CIPD_PROTOCOL: v2
 DEVSHELL_CLIENT_PORT: 35545
 DOCKER_CONFIG: /b/s/w/ir/tmp/docker_cfg_task
 DOCKER_TMPDIR: /b/s/w/ir/tmp/docker_tmp_task
 GIT_CONFIG_NOSYSTEM: 1
 GIT_TERMINAL_PROMPT: 0
 HOME: /home/swarming
 INFRA_GIT_WRAPPER_HOME: /b/s/w/ir/tmp/git_home_task
 INVOCATION_ID: 57d958511a8c4a7cad848876d0c68591
 JOURNAL_STREAM: 8:14659
 LANG: en_US.UTF-8
 LOGDOG_COORDINATOR_HOST: logs.chromium.org
 LOGDOG_STREAM_PREFIX: buildbucket/cr-buildbucket.appspot.com/8916079976302960224
 LOGDOG_STREAM_PROJECT: fuchsia
 LOGDOG_STREAM_SERVER_PATH: unix:/b/s/w/ir/tmp/ld.sock
 LOGNAME: swarming
 LUCI_CONTEXT: /b/s/w/itAb2IBK/luci_context.858782919
 MAC_CHROMIUM_TMPDIR: /b/s/w/ir/tmp/t
 NO_GCE_CHECK: False
 PATH: /b/s/w/ir/cipd_bin_packages:/b/s/w/ir/cipd_bin_packages/bin:/b/s/cipd_cache/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 PWD: /b/s/w/ir/k
 PYTHONIOENCODING: UTF-8
 PYTHONUNBUFFERED: 1
 SHELL: /bin/bash
 SHLVL: 1
 SWARMING_BOT_ID: fuchsia-debian-16-6907d2bd-us-central1-c-qfmd
 SWARMING_EXTERNAL_BOT_SETUP: 1
 SWARMING_HEADLESS: 1
 SWARMING_SERVER: https://chromium-swarm.appspot.com
 SWARMING_TASK_ID: 443b88060fbd7211
 TEMP: /b/s/w/ir/tmp/t
 TEMPDIR: /b/s/w/ir/tmp/t
 TMP: /b/s/w/ir/tmp/t
 TMPDIR: /b/s/w/ir/tmp/t
 USER: swarming
 VPYTHON_VIRTUALENV_ROOT: /b/s/w/ir/cache/vpython
 _: /b/s/w/ir/cipd_bin_packages/vpython

ERROR at //zircon/public/lib/async-loop/BUILD.gn:16:5: Assertion failed.
    assert(dir_target == false,
    ^-----
async-loop appears twice in Zircon legacy_targets metadata: {
  _label = "//system/ulib/async-loop:async-loop(//public/gn/toolchain:user-arm64-profile)"
  debug = []
  deps = ["//zircon/public/lib/async", "//zircon/public/lib/async-default", "//zircon/public/lib/zircon"]
  dir = "//zircon/system/ulib/async-loop/include"
  headers = ["lib/async-loop/loop.h"]
  import = "//build/zircon/zircon_library.gni"
  include_dirs = ["//zircon/system/ulib/async-loop/include"]
  install = []
  lib_dirs = ["user-arm64-profile.shlib/obj/system/ulib/zircon"]
  public_deps = ["//zircon/public/lib/async"]
  source_dir = "//zircon/system/ulib/async-loop"
  sources = ["//zircon/system/ulib/async-loop/loop.c"]
  target_name = "async-loop"
  target_type = "zircon_library"
} vs {
  _label = "//system/ulib/async-loop:async-loop(//public/gn/toolchain:user-arm64-gcc)"
  debug = []
  deps = ["//zircon/public/lib/async", "//zircon/public/lib/async-default", "//zircon/public/lib/zircon"]
  dir = "//zircon/system/ulib/async-loop/include"
  headers = ["lib/async-loop/loop.h"]
  import = "//build/zircon/zircon_library.gni"
  include_dirs = ["//zircon/system/ulib/async-loop/include"]
  install = []
  lib_dirs = ["user-arm64-gcc.shlib/obj/system/ulib/zircon"]
  public_deps = ["//zircon/public/lib/async"]
  source_dir = "//zircon/system/ulib/async-loop"
  sources = ["//zircon/system/ulib/async-loop/loop.c"]
  target_name = "async-loop"
  target_type = "zircon_library"
}
See //src/connectivity/wlan/drivers/third_party/broadcom/brcmfmac/BUILD.gn:98:5: which caused the file to be included.
    "//zircon/public/lib/async-loop",
    ^-------------------------------
step returned non-zero exit code: 1