Pre-initialize TRegex in the Graal fallback classloader

src/main/java/org/cyclops/integratedscripting/core/packageddependencies/PackagedDependenciesLoader.java

@@ -70,6 +70,11 @@ public static void load() throws IOException {
             Context.Builder build = Context.newBuilder("js");
             Context con = build.build();
             con.eval("js", "console.log('graaljs has been pre-loaded.')");
+            // Force-initialize TRegex here as well.
+            // Its static loggers resolve the 'regex' language id via the thread context classloader,
+            // which only points to Graal within this block.
+            // Initializing it later (on a server thread) fails permanently for the whole JVM session.
+            con.eval("js", "/graaljs/.test('graaljs')");
             con.close();
         } finally {
             Thread.currentThread().setContextClassLoader(p);

src/main/java/org/cyclops/integratedscripting/gametest/GameTestsScripts.java

@@ -15,6 +15,7 @@
 import org.cyclops.integrateddynamics.core.evaluate.variable.ValueObjectTypeItemStack;
 import org.cyclops.integrateddynamics.core.evaluate.variable.ValueTypeBoolean;
 import org.cyclops.integrateddynamics.core.evaluate.variable.ValueTypeInteger;
+import org.cyclops.integrateddynamics.core.evaluate.variable.ValueTypeString;
 import org.cyclops.integrateddynamics.core.evaluate.variable.ValueTypes;
 import org.cyclops.integrateddynamics.part.PartTypePanelDisplay;
 import org.cyclops.integratedscripting.Reference;
@@ -118,6 +119,37 @@ public void testScriptsDisplayScriptOnItem(GameTestHelper helper) {
         });
     }
 
+    @GameTest(template = TEMPLATE_EMPTY, timeoutTicks = TIMEOUT)
+    public void testScriptsDisplayScriptRegex(GameTestHelper helper) {
+        GameTestHelpersIntegratedScripting.NetworkPositions positions = createBasicNetwork(helper, POS);
+
+        // Write script
+        ScriptingNetworkHelpers.getScriptingData().setScript(positions.diskId(), Path.of("script0.js"), "function abc(a) { return /^aether:.+_gloves/.test(a); }", IScriptingData.ChangeLocation.MEMORY);
+
+        // Create variable from script
+        ItemStack variableScript = createVariableForScript(helper.getLevel(), positions.diskId(), Path.of("script0.js"), "abc");
+
+        // Create constants as input to the script's function
+        ItemStack variableConst1 = createVariableForValue(helper.getLevel(), ValueTypes.STRING, ValueTypeString.ValueString.of("aether:leather_gloves"));
+
+        // Insert all variables into the variable store
+        positions.variableStore().getInventory().setItem(0, variableScript);
+        positions.variableStore().getInventory().setItem(1, variableConst1);
+
+        // Create variable card for applying the function
+        ItemStack variableApplied = createVariableForOperator(helper.getLevel(), Operators.OPERATOR_APPLY, new int[]{
+                getVariableFacade(helper.getLevel(), variableScript).getId(),
+                getVariableFacade(helper.getLevel(), variableConst1).getId(),
+        });
+
+        // Place variable in display
+        Pair<PartTypePanelDisplay, PartTypePanelDisplay.State> partAndState = placeVariableInDisplayPanel(helper.getLevel(), positions.displayPanel(), variableApplied);
+
+        helper.succeedWhen(() -> {
+            assertValueEqual(partAndState.getRight().getDisplayValue(), ValueTypeBoolean.ValueBoolean.of(true));
+        });
+    }
+
     @GameTest(template = TEMPLATE_EMPTY, timeoutTicks = TIMEOUT)
     public void testScriptsDisplayScriptInfiniteLoop(GameTestHelper helper) {
         GameTestHelpersIntegratedScripting.NetworkPositions positions = createBasicNetwork(helper, POS);