IndexOutOfBoundsException in Class NachoTextView

[huzaifaiftikhar]

Summary:
App crashes when trying to paste over a chipified text. I am using , as the ChipTerminator.
Source code of the app.

Library version
1.1.1

Steps to reproduce:

• Type a text and create a chip.
• Type another text and create a second chip.
• Select the second chip and cut it.
• Select the first chip and select paste. (Trying to paste the second chip which was cut in the previous step)
• The app crashes on clicking paste.

When I tried reproducing it with the sample apk in this repository, the sample app didn't crash. However, it didn't paste anything either and erased the chip onto which I pasted.

System logs:

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: openfoodfacts.github.scrachx.openfood, PID: 3887
    java.lang.IndexOutOfBoundsException: getChars (0 ... 4) ends beyond length 0
        at android.text.SpannableStringBuilder.checkRange(SpannableStringBuilder.java:1315)
        at android.text.SpannableStringBuilder.getChars(SpannableStringBuilder.java:1197)
        at android.text.TextUtils.getChars(TextUtils.java:100)
        at android.text.SpannableStringBuilder.<init>(SpannableStringBuilder.java:67)
        at android.text.SpannableStringBuilder.subSequence(SpannableStringBuilder.java:1189)
        at com.hootsuite.nachos.NachoTextView.handleTextChanged(NachoTextView.java:839)
        at com.hootsuite.nachos.NachoTextView.afterTextChanged(NachoTextView.java:826)
        at android.widget.TextView.sendAfterTextChanged(TextView.java:9424)
        at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:11983)
        at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:1268)
        at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:574)
        at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:504)
        at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:502)
        at android.widget.TextView.paste(TextView.java:11237)
        at android.widget.TextView.onTextContextMenuItem(TextView.java:10881)
        at com.hootsuite.nachos.NachoTextView.onTextContextMenuItem(NachoTextView.java:619)
        at android.widget.Editor$TextActionModeCallback.onActionItemClicked(Editor.java:3991)
        at com.android.internal.policy.DecorView$ActionModeCallback2Wrapper.onActionItemClicked(DecorView.java:2581)
        at com.android.internal.view.FloatingActionMode$3.onMenuItemSelected(FloatingActionMode.java:96)
        at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:761)
        at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:167)
        at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:908)
        at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:898)
        at com.android.internal.view.FloatingActionMode.lambda$-com_android_internal_view_FloatingActionMode_4856(FloatingActionMode.java:121)
        at com.android.internal.view.-$Lambda$IoKM3AcgDw3Ok5aFi0zlym2p3IA.$m$0(Unknown Source:4)
        at com.android.internal.view.-$Lambda$IoKM3AcgDw3Ok5aFi0zlym2p3IA.onMenuItemClick(Unknown Source:0)
        at com.android.internal.widget.FloatingToolbar$FloatingToolbarPopup$2.onClick(FloatingToolbar.java:425)
        at android.view.View.performClick(View.java:6297)
        at android.view.View$PerformClick.run(View.java:24797)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6626)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)

Expected behavior:
The app shouldn't crash.

Device and Android version:
Motorola Moto G5s
Android 8.1.0

Screenshots: