ComponentType extension error while instantiating

[jeancharles-roger]

Hi,

I used spar cli to instantiate an AADL model composed of several file with an extended system implementation (zip joined, files in lowercase see #235).

Running: spar instance --root dataflow_diag::dataflow.diagram dataflow.aadl dataflow_diagram.aadl hw.aadl fails with:

thread 'main' (3859280) panicked at crates/spar-hir-def/src/instance.rs:2196:42:
index out of bounds: the len is 0 but the index is 0

I checked instance.rs:2196 it searches for subcomponents in the extended system and doesn't find them. I assume it's a bug.

Here are the files.
dataflow.zip

I can provide smaller test files is necessary.