Flutter beta fails with "Failed to subset font"

gistfile1.txt

~/Documents/hitomemo $ tail -30 /Users/suztomo/Library/Logs/gym/Runner-Runner.log                git[branch:dev]
    export VALIDATE_WORKSPACE=YES_ERROR
    export VALID_ARCHS="arm64 arm64e armv7 armv7s"
    export VERBOSE_PBXCP=NO
    export VERSIONING_SYSTEM=apple-generic
    export VERSIONPLIST_PATH=Runner.app/version.plist
    export VERSION_INFO_BUILDER=suztomo
    export VERSION_INFO_FILE=Runner_vers.c
    export VERSION_INFO_STRING=""@(#)PROGRAM:Runner  PROJECT:Runner-6""
    export WATCHKIT_2_SUPPORT_FOLDER_PATH=/Users/suztomo/Library/Developer/Xcode/DerivedData/Runner-bwdncqwtelezipfohaojqhhtsssq/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/WatchKitSupport2
    export WATCHKIT_SUPPORT_FOLDER_PATH=/Users/suztomo/Library/Developer/Xcode/DerivedData/Runner-bwdncqwtelezipfohaojqhhtsssq/Build/Intermediates.noindex/ArchiveIntermediates/Runner/BuildProductsPath/WatchKitSupport
    export WRAPPER_EXTENSION=app
    export WRAPPER_NAME=Runner.app
    export WRAPPER_SUFFIX=.app
    export WRAP_ASSET_PACKS_IN_SEPARATE_DIRECTORIES=NO
    export XCODE_APP_SUPPORT_DIR=/Applications/Xcode.app/Contents/Developer/Library/Xcode
    export XCODE_PRODUCT_BUILD_VERSION=11E608c
    export XCODE_VERSION_ACTUAL=1150
    export XCODE_VERSION_MAJOR=1100
    export XCODE_VERSION_MINOR=1150
    export XPCSERVICES_FOLDER_PATH=Runner.app/XPCServices
    export YACC=yacc
    export arch=undefined_arch
    export variant=normal
    /bin/sh -c /Users/suztomo/Library/Developer/Xcode/DerivedData/Runner-bwdncqwtelezipfohaojqhhtsssq/Build/Intermediates.noindex/ArchiveIntermediates/Runner/IntermediateBuildFilesPath/Runner.build/Release-iphoneos/Runner.build/Script-9740EEB61CF901F6004384FC.sh
Failed to subset font; aborting.

Target release_ios_bundle_flutter_assets failed: FontSubset error: Font subsetting failed with exit code 255.
build failed.
Command PhaseScriptExecution failed with a nonzero exit code


~/Documents/hitomemo $ flutter doctor                           git[branch:dev]
Downloading android-arm-profile/darwin-x64 tools...                 0.9s
Downloading android-arm-release/darwin-x64 tools...                 0.9s
Downloading android-arm64-profile/darwin-x64 tools...               1.0s
Downloading android-arm64-release/darwin-x64 tools...               0.9s
Downloading android-x64-profile/darwin-x64 tools...                 0.9s
Downloading android-x64-release/darwin-x64 tools...                 1.1s
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, 1.19.0-4.2.pre, on Mac OS X 10.15.5 19F101, locale
    en-US)
[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from:
      https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK
      components.
      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup
      for detailed instructions).
      If the Android SDK has been installed to a custom location, set
      ANDROID_SDK_ROOT to that location.
      You may also want to add it to your PATH environment variable.

 
[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
[!] Android Studio (not installed)
[✓] IntelliJ IDEA Community Edition (version 2020.1.2)
[✓] VS Code
 
[!] Connected device                          
    ! No devices available

! Doctor found issues in 3 categories.