With latest version (1.1.4), using BadgeShape.square causes errors

[montyr75]

With 1.1.4 (not previous versions), this code crashes:

Badge(
            badgeColor: color,
            padding: const EdgeInsets.all(2.0),
            shape: BadgeShape.square,
            toAnimate: false,
            badgeContent: Text(
              tn.value.toString(),
              style: style.copyWith(
                color: Colors.black,
                fontWeight: FontWeight.bold,
              ),
            ),
          )

Console:

The following assertion was thrown building Badge(dirty, dependencies: [_EffectiveTickerMode], state: BadgeState#b7d97(ticker inactive)):
'package:flutter/src/painting/rounded_rectangle_border.dart': Failed assertion: line 36 pos 15: 'borderRadius != null': is not true.

The relevant error-causing widget was: 
  Badge file:///C:/Projects/www/Dart/_flutter/bt_buddy/lib/widgets/target_number_display.dart:40:11
When the exception was thrown, this was the stack: 
#2      new RoundedRectangleBorder (package:flutter/src/painting/rounded_rectangle_border.dart:36:15)
#3      BadgeState._getBadge (package:badges/src/badge.dart:111:11)
#4      BadgeState.build (package:badges/src/badge.dart:81:14)
#5      StatefulElement.build (package:flutter/src/widgets/framework.dart:4792:27)
#6      ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4675:15)

If I comment out the shape field, it works again, but it becomes circular...

[yadaniyil]

@montyr75 sorry for delay.

You can use following code:

Badge(
  toAnimate: false,
  badgeColor: Colors.red,
  child: Icon(Icons.mail),
  shape: BadgeShape.square,
  padding: const EdgeInsets.all(2.0),
  position: BadgePosition.topEnd(top: -12, end: -14),
  badgeContent: Text('10', style: TextStyle(color: Colors.white)),
),

Result:

Perhaps you are using an older version of the plugin or Flutter.
Make sure that you have a plugin with the version badges: ^1.1.5 or higher.
Also check and update if you need Flutter to version 1.22.0 or higher.

These actions should help you.