Error during build

________ running '/usr/bin/python sdk/tools/generate_buildfiles.py' in '/usr/local/google/home/eernst/devel/dart/work'
Command failed: /usr/local/google/home/eernst/devel/dart/work/sdk/buildtools/linux-x64/gn gen out/DebugIA32 --args=dart_zlib_path="//runtime/bin/zlib" exclude_kernel_service=false is_product=false dart_runtime_mode="develop" dart_stripped_binary="exe.stripped/dart" use_goma=false dart_platform_sdk=false dart_use_wheezy_sysroot=true is_msan=false is_release=false is_clang=true dart_target_arch="ia32" dart_use_tcmalloc=true goma_dir="None" dart_debug=true host_cpu="x86" dart_snapshot_kind="script" is_tsan=false target_os="linux" dart_use_fallback_root_certificates=true target_cpu="x86" is_asan=false is_debug=true
output: ERROR at //build/dart/dart_action.gni:232:11: Assignment had no effect.
          "$_dart_root/tools/sdks/dart-sdk/bin/snapshots/kernel-service.dart.snapshot"
          ^---------------------------------------------------------------------------
You set the variable "dfe" here and it was unused before it went
out of scope.
See //utils/kernel-service/BUILD.gn:48:1: whence it was called.
prebuilt_dart_action("kernel_service_dill") {
^--------------------------------------------
See //BUILD.gn:56:5: which caused the file to be included.
    "utils/kernel-service:copy_kernel_service_snapshot",
    ^--------------------------------------------------
Running hooks: 100% (14/14), done.