change of check_stack_trace value names

theano/configdefaults.py

@@ -1506,12 +1506,13 @@ AddConfigVar('cycle_detection',
              in_c_key=False)
 
 AddConfigVar('check_stack_trace',
-             "A flag for checking the stack trace during the optimization"
-             " process. The default is not checking the stack trace of any"
-             " optimization. check_all checks if the stack trace is added"
-             " and check_and_skip checks all the stack trace of optimizations"
-             " but skips the ones that have a dummy value ",
-             EnumStr('not_checking', 'check_and_skip', 'check_all'),
+             "A flag for checking the stack trace during the optimization process. "
+             "default (off): does not check the stack trace of any optimization "
+             "log: inserts a dummy stack trace that identifies the optimization"
+             "that inserted that variable."
+             "warn: prints a warning if a stack trace is missing"
+             "raise: raises an exception if a stack trace is missing",
+             EnumStr('off', 'log', 'warn', 'raise'),
              in_c_key=False)
 
 

theano/gof/opt.py

@@ -3043,18 +3043,20 @@ def check_stack_trace(f_or_fgraph, ops_to_check='last', bug_print='raise'):
 
 class CheckStrackTraceFeature(object):
     def on_import(self, fgraph, node, reason):
-        if theano.config.check_stack_trace == 'check_all':
-            if not check_stack_trace(fgraph, 'all'):
+        if theano.config.check_stack_trace != 'off' and not check_stack_trace(fgraph, 'all'):
+            if theano.config.check_stack_trace == 'warn':
+                    warnings.warn(
+                        'Empty stack trace! The optimization that inserted this variable is' + str(reason))
+            if theano.config.check_stack_trace == 'raise':
                     raise NotImplementedError(
-                    'Empty stack trace! The optimization that inserted that variable is' + str(reason))
-        if theano.config.check_stack_trace == 'check_and_skip':
-            if not check_stack_trace(fgraph, 'all'):
+                        'Empty stack trace! The optimization that inserted this variable is' + str(reason))
+            if theano.config.check_stack_trace == 'log':
                     apply_nodes_to_check = fgraph.apply_nodes
                     for node in apply_nodes_to_check:
                         for output in node.outputs:
                             if not hasattr(output.tag, 'trace') or not output.tag.trace:
                                 output.tag.trace = [[('', 0, 'Empty stack trace! The optimization that' +
-                                                 'inserted that variable is ' + str(reason), '')]]
+                                                     'inserted this variable is ' + str(reason), '')]]
 
 
 class CheckStackTraceOptimization(Optimizer):