ThrowableError.stackTrace() result should include suppressed exceptions

[dkarlinsky]

Is your feature request related to a problem? Please describe.

Java Agent implements its own "print stack trace" that ignores Throwable#suppressedExceptions

Feature Description

Add suppressed exception to the stack trace captured here

An example of what Throwable.prinstStackTrace() displays for a throwable with suppressed exceptions:

Throwable exception = new RuntimeException("kaboom!", new IllegalArgumentException("kaboom cause"));
exception.addSuppressed(new IllegalStateException("kaboom suppressed 1"));
exception.addSuppressed(new NullPointerException("kaboom suppressed 2"));
exception.printStackTrace()

java.lang.RuntimeException: kaboom!
	at REPL.$JShell$11.do_it$Aux($JShell$11.java:6)
	at REPL.$JShell$11.do_it$($JShell$11.java:11)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at jdk.jshell/jdk.jshell.execution.DirectExecutionControl.invoke(DirectExecutionControl.java:209)
	at jdk.jshell/jdk.jshell.execution.RemoteExecutionControl.invoke(RemoteExecutionControl.java:116)
	at jdk.jshell/jdk.jshell.execution.DirectExecutionControl.invoke(DirectExecutionControl.java:119)
	at jdk.jshell/jdk.jshell.execution.ExecutionControlForwarder.processCommand(ExecutionControlForwarder.java:144)
	at jdk.jshell/jdk.jshell.execution.ExecutionControlForwarder.commandLoop(ExecutionControlForwarder.java:262)
	at jdk.jshell/jdk.jshell.execution.Util.forwardExecutionControl(Util.java:76)
	at jdk.jshell/jdk.jshell.execution.Util.forwardExecutionControlAndIO(Util.java:137)
	at jdk.jshell/jdk.jshell.execution.RemoteExecutionControl.main(RemoteExecutionControl.java:70)
	Suppressed: java.lang.IllegalStateException: kaboom suppressed 1
		at REPL.$JShell$12.do_it$($JShell$12.java:5)
		... 12 more
	Suppressed: java.lang.NullPointerException: kaboom suppressed 2
		at REPL.$JShell$13.do_it$($JShell$13.java:5)
		... 12 more
Caused by: java.lang.IllegalArgumentException: kaboom cause
	... 14 more
	... 11 more

Describe Alternatives

???

Additional context

We are using ZIO which provides fiber traces (cross thread traces) attached to its errors, which are extremely useful in async code.
For interoperability with other JVM code, ZIO fiber traces are attached to regular throwables.
In the past versions they were added as an extra throwable in the cause chain. This is kind of a hack, and some times requires the use of reflection.
In the latest ZIO release this has been changed in favor of using suppressed exceptions.
This means that once we upgrade ZIO, we will stop seeing fiber traces in NewRelic errors.

Priority

Really Want