[cls] save parameter name for functional types in stub

to make it available for deserialized Fir

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/KotlinStubVersions.kt

@@ -23,12 +23,12 @@ object KotlinStubVersions {
     // Though only kotlin declarations (no code in the bodies) are stubbed, please do increase this version
     //      if you are not 100% sure it can be avoided.
     // Increasing this version will lead to reindexing of all kotlin source files on the first IDE startup with the new version.
-    const val SOURCE_STUB_VERSION = 152
+    const val SOURCE_STUB_VERSION = 153
 
     // Binary stub version should be increased if stub format (org.jetbrains.kotlin.psi.stubs.impl) is changed
     //      or changes are made to the core stub building code (org.jetbrains.kotlin.idea.decompiler.stubBuilder).
     // Increasing this version will lead to reindexing of all binary files that are potentially kotlin binaries (including all class files).
-    private const val BINARY_STUB_VERSION = 88
+    private const val BINARY_STUB_VERSION = 89
 
     // Classfile stub version should be increased if changes are made to classfile stub building subsystem (org.jetbrains.kotlin.idea.decompiler.classFile)
     // Increasing this version will lead to reindexing of all classfiles.

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/elements/KtParameterElementType.java

@@ -42,7 +42,7 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         StringRef fqNameRef = StringRef.fromString(fqName != null ? fqName.asString() : null);
         return new KotlinParameterStubImpl(
                 (StubElement<?>) parentStub, fqNameRef, StringRef.fromString(psi.getName()),
-                psi.isMutable(), psi.hasValOrVar(), psi.hasDefaultValue()
+                psi.isMutable(), psi.hasValOrVar(), psi.hasDefaultValue(), null
         );
     }
 
@@ -54,6 +54,7 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         dataStream.writeBoolean(stub.hasDefaultValue());
         FqName name = stub.getFqName();
         dataStream.writeName(name != null ? name.asString() : null);
+        dataStream.writeName(stub instanceof KotlinParameterStubImpl ? ((KotlinParameterStubImpl) stub).getFunctionTypeParameterName() : null);
     }
 
     @NotNull
@@ -65,7 +66,8 @@ public class KtParameterElementType extends KtStubElementType<KotlinParameterStu
         boolean hasDefaultValue = dataStream.readBoolean();
         StringRef fqName = dataStream.readName();
 
-        return new KotlinParameterStubImpl((StubElement<?>) parentStub, fqName, name, isMutable, hasValOrValNode, hasDefaultValue);
+        return new KotlinParameterStubImpl((StubElement<?>) parentStub, fqName, name, isMutable, hasValOrValNode, hasDefaultValue,
+                                           dataStream.readNameString());
     }
 
     @Override

compiler/psi/src/org/jetbrains/kotlin/psi/stubs/impl/KotlinParameterStubImpl.kt

@@ -30,8 +30,10 @@ class KotlinParameterStubImpl(
     private val name: StringRef?,
     private val isMutable: Boolean,
     private val hasValOrVar: Boolean,
-    private val hasDefaultValue: Boolean
+    private val hasDefaultValue: Boolean,
+    val functionTypeParameterName: String? = null
 ) : KotlinStubBaseImpl<KtParameter>(parent, KtStubElementTypes.VALUE_PARAMETER), KotlinParameterStub {
+
     override fun getName(): String? {
         return StringRef.toString(name)
     }