Issue 1:
Steps to Reproduce

I am new on flutter.I am loading material icons using Icon(Icons.receipt,size: 16) but error logs says Could not get cmap table size.

Logs

flutter run --verbose

#0 throwToolExit (package:flutter_tools/src/base/common.dart:26:3)
#1 RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:404:7)
<asynchronous suspension>
#2 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:401:18)
#3 _asyncThenWrapperHelper.<anonymous closure> (dart:async/runtime/libasync_patch.dart:77:64)
#4 _rootRunUnary (dart:async/zone.dart:1132:38)
#5 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#6 _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#7 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#8 Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#9 Future._complete (dart:async/future_impl.dart:476:7)
#10 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
#11 _AsyncAwaitCompleter.complete (dart:async/runtime/libasync_patch.dart:28:18)
#12 _completeOnAsyncReturn (dart:async/runtime/libasync_patch.dart:295:13)
#13 RunCommand.usageValues (package:flutter_tools/src/commands/run.dart)
#14 _asyncThenWrapperHelper.<anonymous closure> (dart:async/runtime/libasync_patch.dart:77:64)
#15 _rootRunUnary (dart:async/zone.dart:1132:38)
#16 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#17 _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#18 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#19 Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#20 Future._complete (dart:async/future_impl.dart:476:7)
#21 _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
#22 _AsyncAwaitCompleter.complete.<anonymous closure> (dart:async/runtime/libasync_patch.dart:33:20)
#23 _rootRun (dart:async/zone.dart:1124:13)
#24 _CustomZone.run (dart:async/zone.dart:1021:19)
#25 _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#26 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#27 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#28 _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#29 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

flutter analyze

info • Unused import: 'package:tenders/screens/buyer.dart' • lib/main.dart:2:8 • unused_import
info • Unused import: 'package:tenders/screens/register.dart' • lib/main.dart:4:8 • unused_import
info • Unused import: 'package:tenders/screens/splash.dart' • lib/main.dart:8:8 • unused_import
info • Unused import: 'package:tenders/screens/postTender.dart' • lib/main.dart:9:8 • unused_import
info • Unused import: 'dart:async' • lib/screens/buyer.dart:2:8 • unused_import
info • Unused import: 'package:tenders/screens/login.dart' • lib/screens/buyer.dart:4:8 • unused_import
info • Unused import: 'package:tenders/screens/vendorBuyer.dart' • lib/screens/buyer.dart:5:8 • unused_import
info • Unused import: 'dart:developer' • lib/screens/postTenderForm.dart:2:8 • unused_import

## flutter doctor -v
[✓] Flutter (Channel stable, v1.0.0, on Linux, locale en_US.UTF-8)
• Flutter version 1.0.0 at /home/shoaib/Downloads/flutter
• Framework revision 5391447fae (13 days ago), 2018-11-29 19:41:26 -0800
• Engine revision 7375a0f414
• Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)

[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
• Android SDK at /home/shoaib/Android/Sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-27, build-tools 27.0.3
• ANDROID_HOME = /home/shoaib/Android/Sdk
• Java binary at: /opt/android-studio/jre/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.

[✓] Android Studio (version 3.2)
• Android Studio at /opt/android-studio
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)

[✓] VS Code (version 1.27.2)
• VS Code at /usr/share/code
• Flutter extension version 2.21.1

[!] Connected device
! No devices available

Issue 2:
I think I got the same error as #21719 when I use default font. And I've noticed that it depends on internet connection! Error is thrown only when I turn off internet on device. (Android)

Launching lib/main.dart on Mi A1 in debug mode...
Built build/app/outputs/apk/debug/app-debug.apk.
E/flutter (26171): [ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!
E/flutter (26171):
F/flutter (26171): [FATAL:flutter/third_party/txt/src/minikin/FontCollection.cpp(94)] nTypefaces == 0
F/libc (26171): Fatal signal 6 (SIGABRT), code -6 in tid 26188 (1.ui), pid 26171

Originally posted by @gordinmitya in #21719 (comment)