From 6d7ce6cec1d165010de43755d460385f1db29068 Mon Sep 17 00:00:00 2001
From: Nikolay Krasko <nikolay.krasko@jetbrains.com>
Date: Fri, 9 Jun 2017 16:00:13 +0300
Subject: [PATCH] Prevent debugger to stop twice on breakpoints after
 suspension point

 #KT-18453 In Progress
---
 .../coroutines/CoroutineTransformerMethodVisitor.kt        | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformerMethodVisitor.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformerMethodVisitor.kt
index 1055ca9aef0..0f3241b5414 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformerMethodVisitor.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformerMethodVisitor.kt
@@ -524,6 +524,12 @@ class CoroutineTransformerMethodVisitor(
                 val afterSuspensionPointLineNumber = nextLineNumberNode?.line ?: suspendElementLineNumber
                 visitLineNumber(afterSuspensionPointLineNumber, continuationLabelAfterLoadedResult.label)
             })
+
+            if (nextLineNumberNode != null) {
+                // Remove the line number instruction as it now covered with line number on continuation label.
+                // If both linenumber are present in bytecode, debugger will trigger line specific events twice.
+                remove(nextLineNumberNode)
+            }
         }
 
         return continuationLabel
@@ -713,6 +719,7 @@ private fun findSafelyReachableReturns(methodNode: MethodNode): Array<Set<Int>?>
         for (index in 0 until insns.size()) {
             if (insns[index].opcode == Opcodes.ARETURN) continue
 
+            @Suppress("RemoveExplicitTypeArguments")
             val newResult =
                     controlFlowGraph
                             .getSuccessorsIndices(index).plus(index)