Fix bug in formula criteria

sfdx-source/apex-extensions/main/default/classes/criteria/fflib_Criteria.cls

@@ -45,8 +45,6 @@ public virtual with sharing class fflib_Criteria
 	private String type;
 	private IFormulaEvaluator formulaEvaluator;
 
-
-
 	/**
 	 * populate private variables with default settings.
 	 */
@@ -173,6 +171,7 @@ public virtual with sharing class fflib_Criteria
 		return this;
 	}
 
+
 	private interface IFormulaEvaluator
 	{
 		Boolean evaluate(Object record, Map<Integer, Boolean> evaluatedResultByNumber);
@@ -384,12 +383,25 @@ public virtual with sharing class fflib_Criteria
 
 	private Boolean evaluateFormula(Object record)
 	{
-		Map<Integer, Boolean> evaluatedResultByNumber = new Map<Integer, Boolean>();
+		try
-		for (Integer i = 0; i < evaluators.size(); i++)
 		{
-			evaluatedResultByNumber.put(i, evaluators.get(i).evaluate(record));
+				Map<Integer, Boolean> evaluatedResultByNumber = new Map<Integer, Boolean>();
+				for (Integer i = 0; i < evaluators.size(); i++)
+				{
+					evaluatedResultByNumber.put(i, evaluators.get(i).evaluate(record));
+				}
+				return formulaEvaluator.evaluate(record, evaluatedResultByNumber);
+		}
+		catch (Exception e)
+		{
+			// If an error occurs during the validation,
+			// just return a null value and send a warning message to the debug log;
+			System.debug(
+					System.LoggingLevel.WARN,
+					'Criteria condition failure with error: ' + e.getMessage() + '\n' + e.getStackTraceString()
+			);
+			return null;
 		}
-		return formulaEvaluator.evaluate(record, evaluatedResultByNumber);
 	}
 
 	/**

sfdx-source/apex-extensions/tests/classes/criteria/fflib_CriteriaTest.cls

@@ -615,4 +615,20 @@ private with sharing class fflib_CriteriaTest
 						.evaluate(new Contact(LastName = 'Smith'))
 		);
 	}
+
+	@IsTest
+	static void itShouldEvaluateFormula_ReturnNullOnErrorInFormula()
+	{
+		SObject record = fflib_MockSObjectUtil.addRelatedParentObject(
+				new Contact(LastName = 'Smith'),
+				new Account(Id = fflib_IDGenerator.generate(Account.SObjectType), Industry = 'Energy'),
+				'Account');
+
+		System.assertEquals(null,
+				new fflib_Criteria()
+						.FormulaCriteria('1')
+						.equalTo('AccountTypo.Industry', 'Energy')
+						.evaluate(record)
+		);
+	}
 }