Virtual Source/Sink Regression

[willcode]

What happened?

When a flowgraph using a virtual source/sink in message domain is reloaded, the virtual source/sink ports are taken to be stream domain rather than message domain. This causes a domain mismatch error in the flowgraph.

No connection known between domains "stream" and "message"
No connection known between domains "message" and "stream"

The problem was most likely introduced in #6889 / #6977

Reported by Jason Merlo on gnuradio-discuss.

System Information

From maint-3.10 source (v3.10.9.0-rc1)

GNU Radio Version

3.10 (maint-3.10)

Specific Version

3.10.9.0-rc1

Steps to Reproduce the Problem

message_test.grc.txt

Relevant log output

No response

[mbr0wn]

Yup, I see it too. Now if only I knew how those virtual source/sinks work...