REPL: Fix REPL stopping after the first line (#KT-23622)

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/repl/reader/IdeReplCommandReader.kt

@@ -17,8 +17,53 @@
 package org.jetbrains.kotlin.cli.jvm.repl.reader
 
 import org.jetbrains.kotlin.cli.jvm.repl.ReplFromTerminal
+import java.io.BufferedReader
+import java.io.InputStream
+import java.io.InputStreamReader
 
 class IdeReplCommandReader : ReplCommandReader {
-    override fun readLine(next: ReplFromTerminal.WhatNextAfterOneLine) = readLine()
+    override fun readLine(next: ReplFromTerminal.WhatNextAfterOneLine) = readLineForRepl()
     override fun flushHistory() = Unit
-}
+}
+
+private val stdinForRepl: BufferedReader by lazy {
+    BufferedReader(InputStreamReader(object : InputStream() {
+        override fun read(): Int {
+            return System.`in`.read()
+        }
+
+        override fun reset() {
+            System.`in`.reset()
+        }
+
+        override fun read(b: ByteArray): Int {
+            return System.`in`.read(b)
+        }
+
+        override fun close() {
+            System.`in`.close()
+        }
+
+        override fun mark(readlimit: Int) {
+            System.`in`.mark(readlimit)
+        }
+
+        override fun skip(n: Long): Long {
+            return System.`in`.skip(n)
+        }
+
+        override fun available(): Int {
+            return System.`in`.available()
+        }
+
+        override fun markSupported(): Boolean {
+            return System.`in`.markSupported()
+        }
+
+        override fun read(b: ByteArray, off: Int, len: Int): Int {
+            return System.`in`.read(b, off, len)
+        }
+    }))
+}
+
+private fun readLineForRepl(): String? = stdinForRepl.readLine()