JS: prove that KT-8282 is no more reproducible

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -5149,6 +5149,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/inlineSizeReduction/valDeclaration.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("varargTemporaryVar.kt")
+        public void testVarargTemporaryVar() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/inlineSizeReduction/varargTemporaryVar.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("js/js.translator/testData/box/inlineStdlib")

js/js.translator/testData/box/inlineSizeReduction/varargTemporaryVar.kt

@@ -0,0 +1,22 @@
+// EXPECTED_REACHABLE_NODES: 1026
+// CHECK_VARS_COUNT: function=test1 count=0
+// CHECK_VARS_COUNT: function=test2 count=0
+// CHECK_VARS_COUNT: function=test3 count=1
+
+inline fun foo(vararg x: String) = x.size
+
+inline fun bar(vararg x: String) = x.size + x.size
+
+fun test1() = foo("Q", "W", "E")
+
+fun test2() = foo("*", "@")
+
+fun test3() = bar("*", "@")
+
+fun box(): String {
+    if (test1() != 3) return "fail1: ${test1()}"
+    if (test2() != 2) return "fail1: ${test2()}"
+    if (test3() != 4) return "fail1: ${test3()}"
+
+    return "OK"
+}