From cd68cefba1ec874df9ef0abda322498f6c484925 Mon Sep 17 00:00:00 2001
From: Valentin Kipyatkov <valentin@jetbrains.com>
Date: Mon, 1 Jun 2015 18:36:19 +0300
Subject: [PATCH] Added diagnostic for EA-68663

---
 .../src/org/jetbrains/kotlin/idea/completion/ExpectedInfos.kt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/ExpectedInfos.kt b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/ExpectedInfos.kt
index f49e1cb65de..f2b6c9329ee 100644
--- a/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/ExpectedInfos.kt
+++ b/idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/ExpectedInfos.kt
@@ -130,7 +130,9 @@ class ExpectedInfos(
 
     public fun calculateForArgument(call: Call, argument: ValueArgument): Collection<ExpectedInfo>? {
         val argumentIndex = call.getValueArguments().indexOf(argument)
-        assert(argumentIndex >= 0)
+        assert(argumentIndex >= 0) {
+            "Could not find argument '$argument' among arguments of call: $call"
+        }
         val argumentName = argument.getArgumentName()?.getReferenceExpression()?.getReferencedName()
         val isFunctionLiteralArgument = argument is FunctionLiteralArgument
         val argumentPosition = ArgumentPosition(argumentIndex, argumentName, isFunctionLiteralArgument)