From b8ab7ab21b76fb085497ab5b84f424647bf3e2dd Mon Sep 17 00:00:00 2001
From: Li Haoyi <haoyi.sg@gmail.com>
Date: Tue, 18 May 2021 12:27:47 +0800
Subject: [PATCH] Fix default argument handling for huge case classes (#350)

---
 core/src/upickle/core/Types.scala            |  4 ++--
 upickle/test/src-2/upickle/TooBigTests.scala | 19 +++++++++++++++++--
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/core/src/upickle/core/Types.scala b/core/src/upickle/core/Types.scala
index b0c5f5b5c..61b124d84 100644
--- a/core/src/upickle/core/Types.scala
+++ b/core/src/upickle/core/Types.scala
@@ -229,8 +229,8 @@ trait Types{ types =>
       }
       def visitKey(index: Int) = _root_.upickle.core.StringVisitor
       protected def storeValueIfNotFound(i: Int, v: Any) = {
-        if ((found(currentIndex / 64) & (1L << i)) == 0) {
-          found(currentIndex / 64) |= (1L << i)
+        if ((found(i / 64) & (1L << i)) == 0) {
+          found(i / 64) |= (1L << i)
           storeAggregatedValue(i, v)
         }
       }
diff --git a/upickle/test/src-2/upickle/TooBigTests.scala b/upickle/test/src-2/upickle/TooBigTests.scala
index d6a59c09f..37f77298b 100644
--- a/upickle/test/src-2/upickle/TooBigTests.scala
+++ b/upickle/test/src-2/upickle/TooBigTests.scala
@@ -91,6 +91,21 @@ object TooBigTests extends TestSuite {
           err.getMessage ==
             "missing keys in dictionary: _2, _52, _102, _142 at index 1392"
         )
+
+        val readWithDefault1 = upickle.default.read[Big150](
+          written150.replace(",\"_149\":149", "")
+        )
+        assert(readWithDefault1 == b150.copy(_149 = -1337))
+
+        val readWithDefault2 = upickle.default.read[Big150](
+          written150.replace("\"_0\":0,", "")
+        )
+        assert(readWithDefault2 == b150.copy(_0 = 31337))
+
+        val readWithDefault3 = upickle.default.read[Big150](
+          written150.replace("\"_0\":0,", "").replace(",\"_149\":149", "")
+        )
+        assert(readWithDefault3 == b150.copy(_0 = 31337, _149 = -1337))
       }
     }
 //    test("hugeFile"){
@@ -158,7 +173,7 @@ case class Big65(_0: Byte, _1: Byte, _2: Byte, _3: Byte, _4: Byte, _5: Byte, _6:
 object Big65{
   implicit val b65rw: upickle.default.ReadWriter[Big65] = upickle.default.macroRW
 }
-case class Big150(_0: Int, _1: Int, _2: Int, _3: Int, _4: Int, _5: Int, _6: Int, _7: Int,
+case class Big150(_0: Int = 31337, _1: Int, _2: Int, _3: Int, _4: Int, _5: Int, _6: Int, _7: Int,
                   _8: Int, _9: Int, _10: Int, _11: Int, _12: Int, _13: Int, _14: Int,
                   _15: Int, _16: Int, _17: Int, _18: Int, _19: Int, _20: Int, _21: Int,
                   _22: Int, _23: Int, _24: Int, _25: Int, _26: Int, _27: Int, _28: Int,
@@ -180,7 +195,7 @@ case class Big150(_0: Int, _1: Int, _2: Int, _3: Int, _4: Int, _5: Int, _6: Int,
                   _129: Int, _130: Int, _131: Int, _132: Int, _133: Int, _134: Int,
                   _135: Int, _136: Int, _137: Int, _138: Int, _139: Int, _140: Int,
                   _141: Int, _142: Int, _143: Int, _144: Int, _145: Int, _146: Int,
-                  _147: Int, _148: Int, _149: Int){
+                  _147: Int, _148: Int, _149: Int = -1337 /*default*/){
 
   // Workaround for https://github.com/scala/scala/pull/9635
   override def equals(other: Any): Boolean = other match{