致命信号11SIGSEGV，代码1应用程序退出并出错？

如何解决致命信号11SIGSEGV，代码1应用程序退出并出错？

有很多问题，但有相同的错误，但没有一个答案对我有帮助。 多次（通常两次）热加载时会发生此错误。应用退出 错误是

F/libc    (23112): Fatal signal 11 (SIGSEGV),code 1 (SEGV_MAPERR),fault addr 0x40 in tid 23167 (1.ui),pid 23112 (e.bankcardmaker)
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'google/coral/coral:10/QQ3A.200705.002/6506677:user/release-keys'
Revision: '0'
ABI: 'arm64'
Timestamp: 2020-08-11 22:49:58+0530
pid: 23112,tid: 23167,name: 1.ui  >>> com.example.bankcardmaker <<<
uid: 10217
signal 11 (SIGSEGV),fault addr 0x40
Cause: null pointer dereference
    x0  00000078af1f0e00  x1  00000078561033d8  x2  0000000000000000  x3  00000078537760b8
    x4  0000000000000000  x5  0000007855e7c4b0  x6  0000000000000002  x7  0000007839bd7829
    x8  0000000000000080  x9  0000000000000000  x10 0000000000000000  x11 00000078537760c0
    x12 00000078af1e0d00  x13 000000000c98b660  x14 0000000000000020  x15 0000007853776070
    x16 00000078565cc658  x17 000000794203db50  x18 0000007851438000  x19 0000007853776008
    x20 0000007855e7c6cc  x21 0000000000000000  x22 00000078565729e8  x23 00000078565703e0
    x24 0000007843c04ae1  x25 000000785369d000  x26 00000078af1eb400  x27 0000007843c07d10
    x28 0000000000000004  x29 00000078537760a8
    sp  0000007853775fd0  lr  0000007855e7cc88  pc  00000078561033e8
backtrace:
      #00 pc 00000000015013e8  /data/app/com.example.bankcardmaker-XIavlq6EvQhqEttGaEZV0Q==/lib/arm64/libflutter.so (BuildId: 58de70400889a37f189df1c29c1d40a374305fc2)
      #01 pc 0000000000009365  <anonymous:7833b00000>
Lost connection to device.
Exited (sigterm)

我发现导致此错误的特定代码行是

final paragraph = createParagraph(fromMap: false,text: 'Num : 5468746674');

函数createParagraph()是这样的：

static ui.Paragraph createParagraph(
      {String text,bool fromMap,Map<String,String> map}) {
    final textStyle = ui.TextStyle(
      fontWeight: FontWeight.bold,color: Colors.white,fontSize: 38,);
    final paragraphStyle = ui.ParagraphStyle(
      textDirection: TextDirection.ltr,);
    final paragraphBuilder = ui.ParagraphBuilder(paragraphStyle)
      ..pushStyle(textStyle);
    try {
      if (fromMap) {
        map.forEach((key,value) {
          paragraphBuilder.addText('\n$key : $value');
        });
      } else {
        paragraphBuilder.addText(text);
      }
    } catch (e) {
      print('Cannot addText');
    }

    final paragraph = paragraphBuilder.build();

    print(paragraph.height);
    // final offset = Offset(75,150);
    return paragraph;
  }