[ImportVerilog] Fix class property segfault and emit error #9347
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Fix an issue around class property handling where code would not properly catch failures in the `getAncestorClassWithProperty()` and some other functions, and would instead try to access the null result. Also add a missing error message if a class property cannot be resolved. This caused about half of the segfaults in the sv-tests suite [1]. [1]: https://github.com/circt/circt-tests/blob/results/2025/2025-12-15-131140-main-82227de/sv-tests/segfaults.txt
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Fix an issue around class property handling where code would not properly catch failures in the
getAncestorClassWithProperty()and some other functions, and would instead try to access the null result.Also add a missing error message if a class property cannot be resolved.
This caused about half of the segfaults in the sv-tests suite 1.