From 1c8af707cc6e15f2d10da2f3025743c1ad1bfa83 Mon Sep 17 00:00:00 2001
From: fridis <fridi@fridi.de>
Date: Fri, 22 Sep 2023 15:38:32 +0200
Subject: [PATCH] JVM: Add support for call target type being unit (Java's
 void), fix #1902

The code to filter out unit type values was present for the arguments already,
we need this as well for the target that is passed as a first argument and that
may be unit type as well.
---
 src/dev/flang/be/jvm/Types.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/dev/flang/be/jvm/Types.java b/src/dev/flang/be/jvm/Types.java
index 05a4b6d04..e3443a59c 100644
--- a/src/dev/flang/be/jvm/Types.java
+++ b/src/dev/flang/be/jvm/Types.java
@@ -533,7 +533,11 @@ String descriptor(boolean explicitOuter, int cl, boolean pre)
       {
         var or = _fuir.clazzOuterRef(cl);
         var ot = _fuir.clazzResultClazz(or);
-        as.append(resultType(ot).descriptor());
+        var at = resultType(ot);
+        if (at != PrimitiveType.type_void)
+          {
+            as.append(at.descriptor());
+          }
       }
     for (var ai = 0; ai < _fuir.clazzArgCount(cl); ai++)
       {