From 89db8759e052abab4da8c6fe09ba57d94fda9486 Mon Sep 17 00:00:00 2001
From: Fabio Niephaus <code@fniephaus.com>
Date: Thu, 14 Nov 2024 09:48:35 +0100
Subject: [PATCH] Catch ProcessSwitch in headless mode only

---
 .../hpi/swa/trufflesqueak/model/AbstractSqueakObject.java | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/model/AbstractSqueakObject.java b/src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/model/AbstractSqueakObject.java
index d19d47ab5..09a0e8e87 100644
--- a/src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/model/AbstractSqueakObject.java
+++ b/src/de.hpi.swa.trufflesqueak/src/de/hpi/swa/trufflesqueak/model/AbstractSqueakObject.java
@@ -70,8 +70,12 @@ protected static final Object send(final AbstractSqueakObject receiver, final Me
             return performInteropSendNode.execute(node, receiver, message, arguments);
         } catch (final ProcessSwitch ps) {
             CompilerDirectives.transferToInterpreter();
-            image.printToStdErr(ps);
-            throw new IllegalArgumentException();
+            if (image.options.isHeadless()) {
+                image.printToStdErr(ps);
+                throw new IllegalArgumentException();
+            } else {
+                throw ps; // open debugger in interactive mode
+            }
         } finally {
             if (wasActive) {
                 image.interrupt.activate();