The "Convert Instance VI to Standard VI" right-click option on malleable VIs made me think if this technology could be used for debugging otherwise inlined VIs (and therefore also malleable VIs)?
VIs are obviously inlined without their block diagrams, so my suggestion would require two changes:
1) 'Allow debugging' must be settable in combination with inlining in VI Properties >> Execution.
2) LabVIEW IDE and RTE would have to call inlined VIs in different ways, depending on this setting. Suggestion follows:
Running in the IDE
The IDE would now create a temporary unique instance for each running inlined subVI that has debugging enabled. This would allow us to double-click on an "inlined" subVI while it's running, and have that temporary instance open up ready for probing. Settings like the 'SubVI Node Setup' dialog would now also be available for inlined VIs, if they have 'Allow debugging' on. Set 'Allow debugging' off and inlined VIs will behave as today (so no change for any existing code).
Running in the RTE
Executables are built with 'Enable debugging' either on or off (Advanced page of the Application Builder). I suggest that Application Builder builds in unique instances in place of debug-enabled inlined VIs when 'Enable debugging' is on, and bakes in ordinary inlined code when 'Enable debugging' is off. This would allow us to debug into inlined (and thus also malleable) VIs inside executables with remote debugging. Loose VIs called with the RTE would have had their inlined callees compiled with either debug capability or not, depending on their 'Allow debugging' setting as discussed above in "Running in the IDE".
What do you think - would it be nice to be able to debug inlined VIs?