catch more case of projects/.../gencov failure

jass/server.py

@@ -96,9 +96,11 @@ def project_detail(project_id: str):
 def project_gencov_view(project_id: str):
     try:
         return JSONResponse(load_project(project_id=project_id).get_project_gencov())
-    except ValueError as e:
+    except ValueError as e:  # NaN in values
         raise HTTPException(status_code=500, detail=str(e))
-    except HDF5ExtError as e:
+    except HDF5ExtError as e:  # file corrupted
+        raise HTTPException(status_code=500, detail=str(e))
+    except Exception as e:  # anything else
         raise HTTPException(status_code=500, detail=str(e))