Related to the fixed issue JDK-8212102, when setting directly text with control characters an IOOBE is thrown.

Running the attached test causes:

Exception in thread "JavaFX Application Thread" java.lang.StringIndexOutOfBoundsException: begin 8, end 8, length 0
        at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4601)
        at java.base/java.lang.String.substring(String.java:2704)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl.updateSelectedText(TextInputControl.java:184)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl.replaceText(TextInputControl.java:1272)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl.filterAndSet(TextInputControl.java:1228)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl$TextProperty.doSet(TextInputControl.java:1479)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl$TextProperty.set(TextInputControl.java:1392)
        at javafx.controls@21-ea/javafx.scene.control.TextInputControl.setText(TextInputControl.java:360)

The issue can be reproduced when:
- the new text consist only of control characters like "\n" or "\t\n",
- and the existing text has a length greater than the new text.

The same workaround provided in JDK-8212102 (use of a TextFormatter) prevents the issue.

JavaFX versions 11.0.2 to 11.0.18, 12 until 15-ea-7, work fine.

JavaFX versions 15-ea-8 to 15, 16, 17 to 17.0.6, 18, 19, 20-ea, 21-ea, head, fail.

So it seems the fix for the issue JDK-8176270 caused a regression (that is when TextInputControl::updateSelectedText was added), probably by removing these lines in https://github.com/effad/jfx/blob/master/modules/javafx.controls/src/main/java/javafx/scene/control/TextInputControl.java#L183:

    int start = sel.getStart();
    int end = sel.getEnd();
- int length = txt.length();
- if (end > start + length) end = length;
- if (start > length-1) start = end = 0;
    selectedText.set(txt.substring(start, end));

Bringing them back seems to solve the issue.