JavaFX silently swallowing exception raised in drag listeners

Question

It appears that exceptions are silently swallowed in drag over listeners in JavaFX. I\'ve searched and can\'t find any mention of this in the documentation.

I\'ve r

Answer 1

It appears that native method WinDnDClipboard.push(Object[], int) - backed by GlassClipboard.cpp swallows the exception silently. A call back to Throwable.getMessage() can be seen in the debugger but no exception is printed to the console.

The Java 9 version of this file (http://hg.openjdk.java.net/openjfx/9-dev/rt/file/1a3f128518cd/modules/javafx.graphics/src/main/native-glass/win/GlassClipboard.cpp) has an additional call to CheckAndClearException(env); as defined in Utils.cpp, however this is against RT-35400 which appears unrelated. This has not been backported to Java 8.