- The exceptions in KT-63130 occur because PSI tree change events may be
published when parts of the PSI under modification are inconsistent.
Such inconsistent elements are then analyzed by
`LLFirDeclarationModificationService` to check if the modification
occurs in a contract statement.
- The solution adds `*OrNull` functions to `KtQualifiedExpression` which
return `null` instead of failing with an exception when the receiver
or selector cannot be found.
^KT-63130 fixed
Marco Pennekamp
6668cc281d