From 7177e24e98e0039f3cd9ec43b303d2b72dd95b90 Mon Sep 17 00:00:00 2001
From: MKZaito <127297267+MKZaito@users.noreply.github.com>
Date: Thu, 30 Apr 2026 18:07:05 +0200
Subject: [PATCH 1/3] prevent Crash during StartUp

---
 .../types/SysMLv2DeriveSymTypeOfCommonExpressions.java    | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/language/src/main/java/de/monticore/lang/sysmlv2/types/SysMLv2DeriveSymTypeOfCommonExpressions.java b/language/src/main/java/de/monticore/lang/sysmlv2/types/SysMLv2DeriveSymTypeOfCommonExpressions.java
index cbacad46..f4cf1a22 100644
--- a/language/src/main/java/de/monticore/lang/sysmlv2/types/SysMLv2DeriveSymTypeOfCommonExpressions.java
+++ b/language/src/main/java/de/monticore/lang/sysmlv2/types/SysMLv2DeriveSymTypeOfCommonExpressions.java
@@ -78,6 +78,8 @@ protected void calculateFieldAccessAboutPortUsage(SymTypeExpression type) {
         var streamType = SysMLv2Mill.globalScope().resolveType("EventStream");
         if(streamType.isEmpty()) {
           Log.error("Stream not defined in global scope. Initialize it with 'SysMLv2Mill.addStreamType()'!");
+          getTypeCheckResult().setResult(SymTypeExpressionFactory.createObscureType());
+          return;
         }
         if (type instanceof SymTypeArray) {
           //for example, type like boolean[], int[]...
@@ -158,7 +160,8 @@ protected void calculateFieldAccess(ASTFieldAccessExpression expr,
         //in superclass is: getTypeCheckResult().setResult(type);
         if (expr.getExpression() instanceof ASTNameExpression) {
           //case for expression like f.a,f.a[1]
-          if (((ASTNameExpression) expr.getExpression()).getDefiningSymbol().get() instanceof PortUsage2VariableSymbolAdapter) {
+          var definingSymbol = ((ASTNameExpression) expr.getExpression()).getDefiningSymbol();
+          if (definingSymbol.isPresent() && definingSymbol.get() instanceof PortUsage2VariableSymbolAdapter) {
             calculateFieldAccessAboutPortUsage(type);
           } else {
             //else-case for SuperClass
@@ -169,7 +172,8 @@ protected void calculateFieldAccess(ASTFieldAccessExpression expr,
           var arrayExpr = expr.getExpression();
           if (((ASTArrayAccessExpression) arrayExpr).getExpression() instanceof ASTNameExpression) {
             var nameExpr = ((ASTArrayAccessExpression) arrayExpr).getExpression();
-            if (((ASTNameExpression) nameExpr).getDefiningSymbol().get() instanceof PortUsage2VariableSymbolAdapter) {
+            var definingSymbol = ((ASTNameExpression) nameExpr).getDefiningSymbol();
+            if (definingSymbol.isPresent() && definingSymbol.get() instanceof PortUsage2VariableSymbolAdapter) {
               calculateFieldAccessAboutPortUsage(type);
             } else {
               //else-case for SuperClass

From 4a7f6d6011a36c08be98e86347c6e6c6d16ca468 Mon Sep 17 00:00:00 2001
From: MKZaito <127297267+MKZaito@users.noreply.github.com>
Date: Thu, 30 Apr 2026 18:07:55 +0200
Subject: [PATCH 2/3] load StreamSymbols in GlobalScope during StartUp

---
 .../src/main/java/de/monticore/lang/sysmlv2/SysMLv2Mill.java    | 1 +
 .../src/main/java/de/monticore/lang/sysmlv2/SysMLv2Tool.java    | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Mill.java b/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Mill.java
index fbd95d84..8375ac2f 100644
--- a/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Mill.java
+++ b/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Mill.java
@@ -36,6 +36,7 @@ public static void prepareGlobalScope() {
     SysMLv2Mill.addScalarValueTypes();
     SysMLv2Mill.addCollectionTypes();
     SysMLv2Mill.addTsynVariables();
+    SysMLv2Tool.loadStreamSymbolsFromJar();
   }
 
   /**
diff --git a/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Tool.java b/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Tool.java
index 376e4f0c..f03f1d2e 100644
--- a/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Tool.java
+++ b/language/src/main/java/de/monticore/lang/sysmlv2/SysMLv2Tool.java
@@ -462,7 +462,7 @@ public void run(String[] args) {
     }
   }
 
-  public void loadStreamSymbolsFromJar() {
+  public static void loadStreamSymbolsFromJar() {
     URL streamDefUrl = SysMLv2Tool.class.getClassLoader().getResource(
         "Stream.symtabdefinitionsym");
 

From 325c276eb26773f0ee05bd8fa94b7096a33c34de Mon Sep 17 00:00:00 2001
From: MKZaito <127297267+MKZaito@users.noreply.github.com>
Date: Thu, 30 Apr 2026 20:01:19 +0200
Subject: [PATCH 3/3] version bumb to 7.8.42

---
 gradle.properties | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gradle.properties b/gradle.properties
index 28212dbd..6a7369e8 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -25,4 +25,4 @@ assertj_version    = 3.21.0
 junit_version      = 5.8.2
 
 # Version of published artifacts
-version            = 7.8.41
+version            = 7.8.42