After cloning the project, import the project in IntelliJ by choosing the project directory in the Open project dialog.

For handy work with compiler tests it's recommended to use [
Kotlin Compiler Test Helper](https://github.com/demiurg906/test-data-helper-plugin)

### Dependency verification

We have a [dependencies verification](https://docs.gradle.org/current/userguide/dependency_verification.html) feature enabled in the

            if (!boundTypeArguments.isCompatible) {
                return false
            }

            checkedTypeParameters.add(typeParameter)
            if (!areBoundsCompatible(boundTypeArguments.upper, boundTypeArguments.lower, checkedTypeParameters)) {
                return false
            }
        }

        return true
    }

            token,
        )
    }
    add(FirErrors.FINAL_UPPER_BOUND) { firDiagnostic ->
        FinalUpperBoundImpl(
            firSymbolBuilder.typeBuilder.buildKtType(firDiagnostic.a),
            firDiagnostic as KtPsiDiagnostic,
            token,
        )
    }
    add(FirErrors.UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE) { firDiagnostic ->
        UpperBoundIsExtensionFunctionTypeImpl(

- [`KT-62313`](https://youtrack.jetbrains.com/issue/KT-62313) Kotlin/Native Compiler crash: ClassCastException in IntrinsicGenerator
- [`KT-60902`](https://youtrack.jetbrains.com/issue/KT-60902) visibility vs upper bound expect actual matching conflict
- [`KT-61095`](https://youtrack.jetbrains.com/issue/KT-61095) K2: "IAE: source must not be null" from FirMultipleDefaultsInheritedFromSupertypesChecker

        val signature = StringCharacterIterator(canonicalSignature)
        val javaType = SignatureParsing.parseTypeString(signature, StubBuildingVisitor.GUESSING_MAPPER)
        val typeInfo = TypeInfo.fromString(javaType, false)
        val typeText = TypeInfo.createTypeText(typeInfo) ?: return null

        return SyntheticTypeElement(useSitePosition, typeText)
    }

    val signature = StringCharacterIterator(canonicalSignature)
    val javaType = SignatureParsing.parseTypeString(signature, StubBuildingVisitor.GUESSING_MAPPER)
    val typeInfo = TypeInfo.fromString(javaType, false)
    val typeText = TypeInfo.createTypeText(typeInfo) ?: return null

    return SyntheticTypeElement(useSitePosition, typeText)
}

private fun KtExpression.getPossiblyQualifiedSimpleNameExpression(): KtSimpleNameExpression? {
    return ((this as? KtQualifiedExpression)?.selectorExpression ?: this) as? KtSimpleNameExpression?
}

/**
 * Helper abstraction to navigate through qualified FIR elements - we have to match [ClassId] and PSI qualifier pair
 * to correctly reason about long qualifiers.
 */
private sealed interface TypeQualifier {