diff --git a/ext/pcre/php_pcre.c b/ext/pcre/php_pcre.c
index 09f16410475..fa94b3e09f5 100644
--- a/ext/pcre/php_pcre.c
+++ b/ext/pcre/php_pcre.c
@@ -585,7 +585,10 @@ static int _preg_do_eval(char *eval_str, char *subject, int *offsets,
 	}
 
 	/* Run the code */
-	zend_eval_string(code, &retval CLS_CC ELS_CC);
+	if (zend_eval_string(code, &retval CLS_CC ELS_CC) == FAILURE) {
+		zend_error(E_ERROR, "Failed evaluating code:\n%s\n", code);
+		/* zend_error() does not return in this case */
+	}
 	convert_to_string(&retval);
 	
 	/* Save the return value and its length */
diff --git a/ext/standard/assert.c b/ext/standard/assert.c
index e9a0417a123..b55239c3ce4 100644
--- a/ext/standard/assert.c
+++ b/ext/standard/assert.c
@@ -160,7 +160,10 @@ PHP_FUNCTION(assert)
 			EG(error_reporting) = 0;
 		}
 
-		zend_eval_string(myeval, &retval CLS_CC ELS_CC);
+		if (zend_eval_string(myeval, &retval CLS_CC ELS_CC) == FAILURE) {
+			zend_error(E_ERROR, "Failure evaluating code:\n%s\n", myeval);
+			/* zend_error() does not return in this case. */
+		}
 
 		if (ASSERT(quiet_eval)) {
 			EG(error_reporting) = old_error_reporting;