Give exec its own dict for globals and locals

k4FWCore/scripts/k4run

@@ -23,7 +23,7 @@ seen_files = set()
 option_db = {}
 
 def load_file(file):
-  exec(file.read())
+  exec(file.read(), {})
 
 
 def add_arguments(parser, app_mgr):

test/k4FWCoreTest/CMakeLists.txt

@@ -177,3 +177,8 @@ add_test(NAME Testk4runHelpOnly
 set_test_env(Testk4runHelpOnly)
 set_tests_properties(Testk4runHelpOnly
   PROPERTIES PASS_REGULAR_EXPRESSION "show this help message and exit")
+
+add_test(NAME TestExec
+         WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+         COMMAND ${K4RUN} --dry-run options/TestExec.py)
+set_test_env(TestExec)

test/k4FWCoreTest/options/TestExec.py

@@ -0,0 +1,20 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+a = 5
+comp = [a for i in range(3)]