From 1a89919984ce99ac588160524f0b1898c30d261f Mon Sep 17 00:00:00 2001
From: Volker Berlin <volker.berlin@googlemail.com>
Date: Tue, 26 Nov 2019 21:44:49 +0100
Subject: [PATCH] the dup of this must on the end if there are no more
 parameters

---
 src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java b/src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
index 3e4a65e..896f3a0 100644
--- a/src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
+++ b/src/de/inetsoftware/jwebassembly/module/WasmCodeBuilder.java
@@ -481,7 +481,7 @@ public abstract class WasmCodeBuilder {
         }
         if( varIndex < 0 ) {
             varIndex = getTempVariable( virtualCall.getThisType(), instr.getCodePosition(), javaCodePos + 1 );
-            idx = findPushInstruction( count - 1, false );
+            idx = count == 1 ? instructions.size() : findPushInstruction( count - 1, false );
             instructions.add( idx, new DupThis( virtualCall, varIndex, javaCodePos ) );
         }
         virtualCall.setVariableIndexOfThis( varIndex );