Fix block-block infinite loop.

Issue #1614

Author: Felipe Zimmerle

CHANGES

@@ -1,6 +1,8 @@
 v3.0.x - YYYY-MMM-DD (To be released)
 -------------------------------------
 
+ - Fix block-block infinite loop.
+   [Issue #1614 - @zimmerle, @michaelgranzow-avi]
  - Correction remove_by_tag and remove_by_msg logic.
    [Issue #1636 - @Minasu]
  - Fix LMDB compile error

src/actions/disruptive/block.cc

@@ -37,7 +37,8 @@ bool Block::evaluate(Rule *rule, Transaction *transaction,
 #endif
 
     for (Action *a : transaction->m_rules->m_defaultActions[rule->m_phase]) {
-        if (a->isDisruptive() == false) {
+        if (a->isDisruptive() == false
+            || dynamic_cast<actions::disruptive::Block *>(a) != NULL) {
             continue;
         }
         a->evaluate(rule, transaction, rm);