title: How to fix a problem showing "program linking failed" in flutter and crashes the App
body: <p>Whenever i pressed the Run code for my flutter app it shows "Program linking failed" in the debugging section...But the problem lies when i press the submit button which i designed in the flutter UI it crashes the App. 
  I tried uninstalling the app and reinstalled it ..but it keep happening.
  Used both emulator and hardware phone.
  Using latest flutter version.</p>
  
  <pre><code>Launching lib\main.dart on Android SDK built for x86 in debug mode...
  Initializing gradle...
  Resolving dependencies...
  Running Gradle task 'assembleDebug'...
  Built build\app\outputs\apk\debug\app-debug.apk.
  Installing build\app\outputs\apk\app.apk...
  I/flutterpractis( 6194): Not late-enabling -Xcheck:jni (already on)
  W/flutterpractis( 6194): Unexpected CPU variant for X86 using defaults: x86
  I/flutterpractis( 6194): The ClassLoaderContext is a special shared library.
  Syncing files to device Android SDK built for x86...
  D/        ( 6194): HostConnection::get() New Host Connection established 0xe1592500, tid 6255
  D/EGL_emulation( 6194): eglMakeCurrent: 0xe74d16e0: ver 3 0 (tinfo 0xe1583330)
  D/skia    ( 6194): Program linking failed.
  I/chatty  ( 6194): uid=10088(com.example.flutterpractise) 1.gpu identical 9 lines
  D/skia    ( 6194): Program linking failed.
  D/skia    ( 6194): Program linking failed.
  I/chatty  ( 6194): uid=10088(com.example.flutterpractise) 1.gpu identical 3 lines
  D/skia    ( 6194): Program linking failed.
  D/skia    ( 6194): Program linking failed.
  
  
  After i pressed the submit button...
  
  
  E/flutter ( 6194): [ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!
  E/flutter ( 6194): 
  E/flutter ( 6194): [ERROR:flutter/third_party/txt/src/minikin/FontFamily.cpp(184)] Could not get cmap table size!
  E/flutter ( 6194): 
  F/flutter ( 6194): [FATAL:flutter/third_party/txt/src/minikin/FontCollection.cpp(95)] nTypefaces == 0
  F/libc    ( 6194): Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 6254 (1.ui), pid 6194 (flutterpractise)
  *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
  Build fingerprint: 'google/sdk_gphone_x86/generic_x86:9/PSR1.180720.075/5124027:user/release-keys'
  Revision: '0'
  ABI: 'x86'
  pid: 6194, tid: 6254, name: 1.ui  &gt;&gt;&gt; com.example.flutterpractise &lt;&lt;&lt;
  signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
  Abort message: '[FATAL:flutter/third_party/txt/src/minikin/FontCollection.cpp(95)] nTypefaces == 0
  '
      eax 00000000  ebx 00001832  ecx 0000186e  edx 00000006
      edi 00001832  esi 00000060
      ebp cb6cc0c8  esp cb6cc068  eip ebf9eb39
  backtrace:
      #00 pc 00000b39  [vdso:ebf9e000] (__kernel_vsyscall+9)
      #01 pc 0001fdf8  /system/lib/libc.so (syscall+40)
      #02 pc 00022ed3  /system/lib/libc.so (abort+115)
      #03 pc 00bddc8a  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #04 pc 00e5969f  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #05 pc 00e5c94d  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #06 pc 00e5d351  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #07 pc 00c00388  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #08 pc 00bfdcd4  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #09 pc 00bfd273  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #10 pc 01036a57  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #11 pc 010369b0  /data/app/com.example.flutterpractise-DT0vCEIyC2uVyZUybDCb5w==/lib/x86/libflutter.so (offset 0xb97000)
      #12 pc 00000957  &lt;anonymous:cb240000&gt;
  Application finished.
  </code></pre>