Revert "Simplify tail-call optimisation check"

This reverts commit a5bcd3495e.

 #KT-27190: Open
 #KT-29327: Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/CoroutineTransformerMethodVisitor.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the license/LICENSE.txt file.
  */
 
@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.codegen.optimization.DeadCodeEliminationMethodTransf
 import org.jetbrains.kotlin.codegen.optimization.boxing.isPrimitiveUnboxing
 import org.jetbrains.kotlin.codegen.optimization.common.*
 import org.jetbrains.kotlin.codegen.optimization.fixStack.FixStackMethodTransformer
+import org.jetbrains.kotlin.codegen.optimization.fixStack.top
 import org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.config.isReleaseCoroutines
@@ -951,7 +952,13 @@ private fun allSuspensionPointsAreTailCalls(
         }
         if (insideTryBlock) return@all false
 
-        safelyReachableReturns[endIndex + 1] != null
+        safelyReachableReturns[endIndex + 1]?.all { returnIndex ->
+            sourceFrames[returnIndex].top().sure {
+                "There must be some value on stack to return"
+            }.insns.all { sourceInsn ->
+                sourceInsn?.let(instructions::indexOf) in beginIndex..endIndex
+            }
+        } ?: false
     }
 }