(royale-compiler) branch develop updated: MXMLClassDirectiveProcessor: Fixed operand stack underflow error when using data binding in MXML to assign to property.

[joshtynjala]

This is an automated email from the ASF dual-hosted git repository.

joshtynjala pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/royale-compiler.git


The following commit(s) were added to refs/heads/develop by this push:
     new 739d7db2b MXMLClassDirectiveProcessor: Fixed operand stack underflow 
error when using data binding in MXML to assign to <fx:Object> property.
739d7db2b is described below

commit 739d7db2bf47095ae4626d821636df195c6bddf1
Author: Josh Tynjala <joshtynj...@apache.org>
AuthorDate: Mon Jul 13 15:57:56 2026 -0700

    MXMLClassDirectiveProcessor: Fixed operand stack underflow error when using 
data binding in MXML to assign to <fx:Object> property.
---
 RELEASE_NOTES.md                                   |  1 +
 .../as/codegen/MXMLClassDirectiveProcessor.java    | 23 +++++++++++++---------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 86a59957c..5ba236392 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -90,6 +90,7 @@ Apache Royale Compiler 1.0.0
 - compiler: Fixed missing symbols specified with `-includes` compiler option 
in generated JS.
 - compiler: Fixed missing "Generated byte code contains an operand stack 
underflow" error when warnings are reported without other errors.
 - compiler: Fixed null exception when emitting embedded plain text to JS.
+- compiler: Fixed operand stack underflow error when using data binding in 
MXML to assign to `<fx:Object>` property.
 - debugger: Added missing isolate ID to SWF load and unload events.
 - debugger: Fixed debugger targeting the current JDK version instead of the 
intended minimum JDK version.
 - debugger: Fixed localized messages appearing as unprocessed tokens.
diff --git 
a/compiler/src/main/java/org/apache/royale/compiler/internal/as/codegen/MXMLClassDirectiveProcessor.java
 
b/compiler/src/main/java/org/apache/royale/compiler/internal/as/codegen/MXMLClassDirectiveProcessor.java
index 5bd0fb018..01ded529b 100644
--- 
a/compiler/src/main/java/org/apache/royale/compiler/internal/as/codegen/MXMLClassDirectiveProcessor.java
+++ 
b/compiler/src/main/java/org/apache/royale/compiler/internal/as/codegen/MXMLClassDirectiveProcessor.java
@@ -4040,15 +4040,20 @@ public class MXMLClassDirectiveProcessor extends 
ClassDirectiveProcessor
             
             if (propertyNode.getParent().getNodeID() == ASTNodeID.MXMLObjectID)
             {
-                // TODO This case presuambly also needs
-                // some logic involving isDb.
-                
-                // Push the property name.
-                context.addInstruction(OP_pushstring, propertyName);
-                
-                // Push the property value.
-                // Do this by codegen'ing sole child, which is an 
IMXMLInstanceNode.
-                traverse(propertyNode, context);
+                if (!isDb)
+                {
+                    // Push the property name.
+                    context.addInstruction(OP_pushstring, propertyName);
+                    
+                    // Push the property value.
+                    // Do this by codegen'ing sole child, which is an 
IMXMLInstanceNode.
+                    traverse(propertyNode, context);
+                }
+                else
+                {
+                    context.addInstruction(OP_pushstring, propertyName);
+                    context.addInstruction(OP_pushnull);
+                }
             }
             else
             {