Fix incorrect builder inference usage

compiler/fir/jvm/src/org/jetbrains/kotlin/fir/scopes/jvm/JvmMappedScope.kt

@@ -131,7 +131,7 @@ class JvmMappedScope(
 
         // NOTE: No-arg constructors
         @OptIn(ExperimentalStdlibApi::class)
-        private val additionalHiddenConstructors = buildSet {
+        private val additionalHiddenConstructors = buildSet<String> {
             // kotlin.text.String pseudo-constructors should be used instead of java.lang.String constructors
             listOf(
                 "",

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/FirWhenExhaustivenessTransformer.kt

@@ -63,7 +63,7 @@ class FirWhenExhaustivenessTransformer(private val bodyResolveComponents: BodyRe
 
         val checkers = buildList {
             exhaustivenessCheckers.filterTo(this) { it.isApplicable(cleanSubjectType, session) }
-            if (isNotEmpty() && cleanSubjectType.isMarkedNullable) {
+            if (isNotEmpty<WhenExhaustivenessChecker>() && cleanSubjectType.isMarkedNullable) {
                 add(WhenOnNullableExhaustivenessChecker)
             }
         }