String out of bound exception

[shabbir21]

This issue is occurring on all OPPO devices.
64% --> Android 5.1.1
36% --> Android 5.1

Stack trace:

Fatal Exception: java.lang.StringIndexOutOfBoundsException
length=66; regionStart=713; regionLength=1

java.lang.String.startEndAndLength (String.java:504)
java.lang.String.substring (String.java:1333)
android.text.OppoStaticLayout.oppoGenerate (OppoStaticLayout.java:495)
android.text.DynamicLayout.reflow (DynamicLayout.java:305)
android.text.DynamicLayout.<init> (DynamicLayout.java:171)
android.text.DynamicLayout.<init> (DynamicLayout.java:81)
android.text.DynamicLayout.<init> (DynamicLayout.java:64)
android.text.DynamicLayout.<init> (DynamicLayout.java:50)

io.square1.richtextlib.ui.RichContentView.makeLayout (RichContentView.java:279)
io.square1.richtextlib.ui.RichContentView.onMeasure (RichContentView.java:253)

android.view.View.measure (View.java:17573)
android.support.constraint.ConstraintLayout.internalMeasureChildren (ConstraintLayout.java:1210)
android.support.constraint.ConstraintLayout.onMeasure (ConstraintLayout.java:1550)
android.view.View.measure (View.java:17573)
android.support.v4.widget.NestedScrollView.measureChildWithMargins (NestedScrollView.java:1450)
android.widget.FrameLayout.onMeasure (FrameLayout.java:436)
android.support.v4.widget.NestedScrollView.onMeasure (NestedScrollView.java:516)
android.view.View.measure (View.java:17573)
android.support.constraint.ConstraintLayout.onMeasure (ConstraintLayout.java:1617)
android.view.View.measure (View.java:17573)
android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:5561)
android.widget.FrameLayout.onMeasure (FrameLayout.java:436)
android.support.v7.widget.ContentFrameLayout.onMeasure (ContentFrameLayout.java:141)
android.view.View.measure (View.java:17573)
android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:5561)
android.widget.FrameLayout.onMeasure (FrameLayout.java:436)
android.view.View.measure (View.java:17573)
android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:5561)
android.widget.FrameLayout.onMeasure (FrameLayout.java:436)
android.view.View.measure (View.java:17573)
android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:5561)
android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1436)
android.widget.LinearLayout.measureVertical (LinearLayout.java:722)
android.widget.LinearLayout.onMeasure (LinearLayout.java:613)
android.view.View.measure (View.java:17573)
android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:5561)
android.widget.FrameLayout.onMeasure (FrameLayout.java:436)
com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure (PhoneWindow.java:2696)
android.view.View.measure (View.java:17573)
android.view.ViewRootImpl.performMeasure (ViewRootImpl.java:2107)
android.view.ViewRootImpl.measureHierarchy (ViewRootImpl.java:1228)
android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:1471)
android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1116)
android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:6098)
android.view.Choreographer$CallbackRecord.run (Choreographer.java:773)
android.view.Choreographer.doCallbacks (Choreographer.java:586)
android.view.Choreographer.doFrame (Choreographer.java:556)
android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:759)
android.os.Handler.handleCallback (Handler.java:739)
android.os.Handler.dispatchMessage (Handler.java:95)
android.os.Looper.loop (Looper.java:159)
android.app.ActivityThread.main (ActivityThread.java:5461)
java.lang.reflect.Method.invoke (Method.java)
java.lang.reflect.Method.invoke (Method.java:372)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:964)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:759)