title: Running "flutter pub get" in myapp... (This is taking an unexpectedly long time.)
body: <p>Steps to Reproduce
  Download the flutter 1.17.5-stable, unzip to ~/development/tools
  install XCode, Android Studio</p>
  <pre><code>flutter create myapp
  </code></pre>
  <p><a href="https://github.com/flutter/flutter/issues/52796" rel="nofollow noreferrer">This</a> issue is very similar, but was closed with hesitation without knowing the cause of problem. And also <a href="https://github.com/flutter/flutter/issues/62138" rel="nofollow noreferrer">here</a>.</p>
  <pre><code>flutter pub get --verbose
  </code></pre>
  <p>And:</p>
  <pre><code>flutter doctor -v
  </code></pre>
  <p>[✓] Flutter (Channel stable, v1.17.5, on Mac OS X 10.15.6 19G73, locale en-US)
  • Flutter version 1.17.5 at /Users/akbarpulatov/Development/tools/flutter
  • Framework revision 8af6b2f038 (3 weeks ago), 2020-06-30 12:53:55 -0700
  • Engine revision ee76268252
  • Dart version 2.8.4</p>
  <p>[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
  • Android SDK at /Users/akbarpulatov/Library/Android/sdk
  • Platform android-30, build-tools 30.0.1
  • Java binary at: /Applications/Android
  Studio.app/Contents/jre/jdk/Contents/Home/bin/java
  • Java version OpenJDK Runtime Environment (build
  1.8.0_242-release-1644-b3-6222593)
  • All Android licenses accepted.</p>
  <p>[✓] Xcode - develop for iOS and macOS (Xcode 11.6)
  • Xcode at /Applications/Xcode.app/Contents/Developer
  • Xcode 11.6, Build version 11E708
  • CocoaPods version 1.9.3</p>
  <p>[✓] Android Studio (version 4.0)
  • Android Studio at /Applications/Android Studio.app/Contents
  • Flutter plugin version 47.1.2
  • Dart plugin version 193.7361
  • Java version OpenJDK Runtime Environment (build
  1.8.0_242-release-1644-b3-6222593)</p>
  <p>[✓] VS Code (version 1.47.2)
  • VS Code at /Applications/Visual Studio Code.app/Contents
  • Flutter extension version 3.12.2</p>
  <p>[✓] Connected device (1 available)
  • iPhone SE (2nd generation) • 425DB4B1-5727-4CEA-98EA-95C24EE81C30 • ios •
  com.apple.CoreSimulator.SimRuntime.iOS-13-6 (simulator)</p>
  <p>• No issues found!</p>