Fix project compilation against bootstrap compiler

Follow-up of 705a8a22, there were several usages of SAM conversions
 for Kotlin functions

compiler/frontend/src/org/jetbrains/kotlin/checkers/utils/CheckerTestUtil.kt

@@ -418,7 +418,7 @@ object CheckerTestUtil {
             psiFile,
             diagnostics,
             emptyMap(),
-            { it.text },
+            com.intellij.util.Function { it.text },
             emptyList(),
             false,
             false
@@ -565,9 +565,9 @@ object CheckerTestUtil {
     ): List<AbstractDiagnosticDescriptor> {
         val validDiagnostics = diagnostics.filter { actualDiagnostic -> actualDiagnostic.diagnostic.isValid }
         val diagnosticDescriptors = groupDiagnosticsByTextRange(validDiagnostics, uncheckedDiagnostics)
-        diagnosticDescriptors.sortWith { d1: AbstractDiagnosticDescriptor, d2: AbstractDiagnosticDescriptor ->
+        diagnosticDescriptors.sortWith(Comparator { d1: AbstractDiagnosticDescriptor, d2: AbstractDiagnosticDescriptor ->
             if (d1.start != d2.start) d1.start - d2.start else d2.end - d1.end
-        }
+        })
         return diagnosticDescriptors
     }
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/FunctionDescriptorResolver.kt

@@ -16,6 +16,7 @@
 
 package org.jetbrains.kotlin.resolve
 
+import com.intellij.openapi.util.ThrowableComputable
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.builtins.getReceiverTypeFromFunctionType
@@ -264,9 +265,9 @@ class FunctionDescriptorResolver(
         if (!isContractsEnabled || !function.mayHaveContract()) return null
 
         return LazyContractProvider(storageManager) {
-            AstLoadingFilter.forceAllowTreeLoading(function.containingFile) {
+            AstLoadingFilter.forceAllowTreeLoading(function.containingFile, ThrowableComputable {
                 expressionTypingServices.getBodyExpressionType(trace, scope, dataFlowInfo, function, functionDescriptor)
-            }
+            })
         }
     }
 

compiler/tests-common/tests/org/jetbrains/kotlin/checkers/BaseDiagnosticsTest.kt

@@ -325,7 +325,7 @@ abstract class BaseDiagnosticsTest : KotlinMultiFileTestWithJava<TestModule, Tes
                     ktFile,
                     filteredDiagnostics,
                     diagnosticToExpectedDiagnostic,
-                    { file -> file.text },
+                    com.intellij.util.Function { file -> file.text },
                     uncheckedDiagnostics,
                     withNewInferenceDirective,
                     renderDiagnosticMessages