diff --git a/libraries/stdlib/src/kotlin/internal/PlatformImplementations.kt b/libraries/stdlib/src/kotlin/internal/PlatformImplementations.kt
index 158eb814e92..adbfb6faf34 100644
--- a/libraries/stdlib/src/kotlin/internal/PlatformImplementations.kt
+++ b/libraries/stdlib/src/kotlin/internal/PlatformImplementations.kt
@@ -20,44 +20,42 @@ internal open class PlatformImplementations {
     public open fun getMatchResultNamedGroup(matchResult: MatchResult, name: String): MatchGroup? {
         throw UnsupportedOperationException("Retrieving groups by name is not supported on this platform.")
     }
-
-    companion object {
-        @JvmField
-        @InlineExposed
-        val INSTANCE: PlatformImplementations = run {
-            val version = getJavaVersion()
-            try {
-                if (version >= 0x10008)
-                    return@run Class.forName("kotlin.internal.JDK8PlatformImplementations").newInstance() as PlatformImplementations
-            } catch (e: ClassNotFoundException) {}
-
-            try {
-                if (version >= 0x10007)
-                    return@run Class.forName("kotlin.internal.JDK7PlatformImplementations").newInstance() as PlatformImplementations
-            } catch (e: ClassNotFoundException) {}
-
-            PlatformImplementations()
-        }
-
-        private fun getJavaVersion(): Int {
-            val default = 0x10006
-            val version = System.getProperty("java.version") ?: return default
-            val firstDot = version.indexOf('.')
-            if (firstDot < 0) return default
-            var secondDot = version.indexOf('.', firstDot + 1)
-            if (secondDot < 0) secondDot = version.length
-
-            val firstPart = version.substring(0, firstDot)
-            val secondPart = version.substring(firstDot + 1, secondDot)
-            return try {
-                firstPart.toInt() * 0x10000 + secondPart.toInt()
-            } catch (e: NumberFormatException) {
-                default
-            }
-        }
-
-    }
-
-
+}
+
+@kotlin.internal.InlineExposed
+internal fun platformCloseSuppressed(instance: Closeable, cause: Throwable) = IMPLEMENTATIONS.closeSuppressed(instance, cause)
+
+
+@JvmField
+internal val IMPLEMENTATIONS: PlatformImplementations = run {
+    val version = getJavaVersion()
+    try {
+        if (version >= 0x10008)
+            return@run Class.forName("kotlin.internal.JRE8PlatformImplementations").newInstance() as PlatformImplementations
+    } catch (e: ClassNotFoundException) {}
+
+    try {
+        if (version >= 0x10007)
+            return@run Class.forName("kotlin.internal.JRE7PlatformImplementations").newInstance() as PlatformImplementations
+    } catch (e: ClassNotFoundException) {}
+
+    PlatformImplementations()
+}
+
+private fun getJavaVersion(): Int {
+    val default = 0x10006
+    val version = System.getProperty("java.version") ?: return default
+    val firstDot = version.indexOf('.')
+    if (firstDot < 0) return default
+    var secondDot = version.indexOf('.', firstDot + 1)
+    if (secondDot < 0) secondDot = version.length
+
+    val firstPart = version.substring(0, firstDot)
+    val secondPart = version.substring(firstDot + 1, secondDot)
+    return try {
+        firstPart.toInt() * 0x10000 + secondPart.toInt()
+    } catch (e: NumberFormatException) {
+        default
+    }
 }
 
diff --git a/libraries/stdlib/src/kotlin/io/ReadWrite.kt b/libraries/stdlib/src/kotlin/io/ReadWrite.kt
index a8948c7dbe9..c0fec9c66f6 100644
--- a/libraries/stdlib/src/kotlin/io/ReadWrite.kt
+++ b/libraries/stdlib/src/kotlin/io/ReadWrite.kt
@@ -6,7 +6,7 @@ import java.io.*
 import java.nio.charset.Charset
 import java.net.URL
 import java.util.NoSuchElementException
-import kotlin.internal.PlatformImplementations
+import kotlin.internal.*
 
 
 /** Returns a buffered reader wrapping this Reader, or this Reader itself if it is already buffered. */
@@ -159,7 +159,7 @@ public inline fun <T : Closeable, R> T.use(block: (T) -> R): R {
     } catch (e: Throwable) {
         closed = true
         @Suppress("NON_PUBLIC_CALL_FROM_PUBLIC_INLINE")
-        PlatformImplementations.INSTANCE.closeSuppressed(this, e)
+        platformCloseSuppressed(this, e)
         throw e
     } finally {
         if (!closed) {
diff --git a/libraries/stdlib/src/kotlin/text/regex/Regex.kt b/libraries/stdlib/src/kotlin/text/regex/Regex.kt
index cc8f7031c83..4391b2d5fa8 100644
--- a/libraries/stdlib/src/kotlin/text/regex/Regex.kt
+++ b/libraries/stdlib/src/kotlin/text/regex/Regex.kt
@@ -19,7 +19,7 @@ package kotlin.text
 import java.util.*
 import java.util.regex.Matcher
 import java.util.regex.Pattern
-import kotlin.internal.DefaultPlatformImplementations
+import kotlin.internal.IMPLEMENTATIONS
 
 private interface FlagEnum {
     public val value: Int
@@ -247,7 +247,7 @@ private class MatcherMatchResult(private val matcher: Matcher, private val input
                 null
         }
         override fun get(name: String): MatchGroup? {
-            return DefaultPlatformImplementations.INSTANCE.getMatchResultNamedGroup(matchResult, name)
+            return IMPLEMENTATIONS.getMatchResultNamedGroup(matchResult, name)
         }
     }
 
diff --git a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
index e4f31d17275..a730c79df5b 100644
--- a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
+++ b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
@@ -1583,6 +1583,10 @@ public final class kotlin/concurrent/TimersKt {
 	public static final fun timer (Ljava/lang/String;Z)Ljava/util/Timer;
 }
 
+public final class kotlin/internal/PlatformImplementationsKt {
+	public static final fun platformCloseSuppressed (Ljava/io/Closeable;Ljava/lang/Throwable;)V
+}
+
 public final class kotlin/io/AccessDeniedException : kotlin/io/FileSystemException {
 	public fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;)V
 	public synthetic fun <init> (Ljava/io/File;Ljava/io/File;Ljava/lang/String;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
@@ -2082,6 +2086,10 @@ public abstract interface class kotlin/text/MatchGroupCollection : java/util/Col
 	public abstract fun get (I)Lkotlin/text/MatchGroup;
 }
 
+public abstract interface class kotlin/text/MatchNamedGroupCollection : kotlin/text/MatchGroupCollection {
+	public abstract fun get (Ljava/lang/String;)Lkotlin/text/MatchGroup;
+}
+
 public abstract interface class kotlin/text/MatchResult {
 	public abstract fun getDestructured ()Lkotlin/text/MatchResult$Destructured;
 	public abstract fun getGroupValues ()Ljava/util/List;