Issue 1:
flutter build apk crashes with the message

===== CRASH =====
version=2.1.0-dev.4.0.flutter-cd9a42239f (Fri Sep 7 21:08:23 2018 +0000) on "macos_simarm"
si_signo=Segmentation fault: 11(11), si_code=1, si_addr=0x148
Dart snapshot generator failed with exit code -6
Snapshotting exited with non-zero exit code: -6

FAILURE: Build failed with an exception.

flutter doctor -v

[✓] Flutter (Channel master, v0.8.2-pre.24, on Mac OS X 10.13.6 17G65, locale en-DE)
• Flutter version 0.8.2-pre.24 at XXXXXXX
• Framework revision 4d9bbc10f2 (14 hours ago), 2018-09-09 03:15:34 -0400
• Engine revision 1770f88548
• Dart version 2.1.0-dev.4.0.flutter-cd9a42239f

[✓] Android toolchain - develop for Android devices (Android SDK 28.0.0-rc1)
• Android SDK at XXXXXXX/android_sdk
• Android NDK at XXXXXXX/android_sdk/ndk-bundle
• Platform android-28, build-tools 28.0.0-rc1
• ANDROID_HOME = XXXXXXX/android_sdk
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
• All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 9.4.1, Build version 9F2000
• ios-deploy 1.9.2
• CocoaPods version 1.5.3

[✓] Android Studio (version 3.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 28.0.1
• Dart plugin version 173.4700
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)

[!] IntelliJ IDEA Community Edition (version 2017.3.4)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• For information about installing plugins, see
https://flutter.io/intellij-setup/#installing-the-plugins

Issue 2:
Steps to Reproduce

Run the Flutter Gallery application on an iPhone 6.

Select the "Text field" demo.

Click on the "Name" field.

Click on the microphone icon on the iOS keyboard and say something.

The text displays in the text field.

Click "Done" in the keyboard area to dismiss the keyboard.

Only the last character of the spoken text is displayed in the text field. All other characters disappear.

Logs

N/A

Flutter Doctor

[✓] Flutter (on Mac OS X 10.12.4 16E195, locale en-US, channel master)

• Flutter at /Users/?/Development/flutter

• Framework revision 767ab66 (32 hours ago), 2017-05-27 00:45:25 -0700

• Engine revision 75c74dc

• Tools Dart version 1.24.0-dev.3.0

[✓] Android toolchain - develop for Android devices (Android SDK 25.0.3)

• Android SDK at /Users/?/Library/Android/sdk

• Platform android-25, build-tools 25.0.3

• ANDROID_HOME = /Users/?/Library/Android/sdk

• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java

• Java version: OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] iOS toolchain - develop for iOS devices (Xcode 8.3.2)

• Xcode at /Applications/Xcode.app/Contents/Developer

• Xcode 8.3.2, Build version 8E2002

• ios-deploy 1.9.1

• CocoaPods version 1.2.1

[✓] Android Studio (version 2.3)

• Android Studio at /Applications/Android Studio.app/Contents

• Gradle version 3.2

• Java version: OpenJDK Runtime Environment (build 1.8.0_112-release-b06)

[✓] IntelliJ IDEA Community Edition (version 2017.1.3)

• Dart plugin version 171.4424.63

• Flutter plugin version 13.1