Merge pull request #2912 from alicevision/fix/noComputedChunks

[core] node: Check chunk size for nodes with dynamic sizes

Author: servantftransperfect

meshroom/core/node.py

@@ -1542,7 +1542,10 @@ def _isInputNode(self):
 
     @property
     def globalExecMode(self):
-        return self._chunks.at(0).execModeName
+        if len(self._chunks):
+            return self._chunks.at(0).execModeName
+        else:
+            return ExecMode.NONE
 
     def getChunks(self) -> list[NodeChunk]:
         return self._chunks