Coverity FORWARD_NULL - CID 12457 - src/match.cpp - in function: matchEvalOps(std::list<MatchOp *, std::allocator<MatchOp *>> &, const CompWindow *) - Dynamic cast to pointer "dynamic_cast <MatchExpOp *>(op)" can return NULL. Assigning: "exp" = "dynamic_cast <MatchExpOp *>(op)". Passing null pointer "exp->e" to function "boost::shared_ptr<CompMatch::Expression>::get() const", which dereferences it.

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CID: 12457
Checker: FORWARD_NULL
Category: dynamic_cast
CWE definition: http://cwe.mitre.org/data/definitions/476.html
File: /tmp/buildd/compiz-0.9.9~daily13.01.14/src/match.cpp
Function: matchEvalOps(std::list<MatchOp *, std::allocator<MatchOp *>> &, const CompWindow *)
Code snippet:
490 value =
491 matchEvalOps (dynamic_cast <MatchGroupOp *> (op)->op, w);
492 break;
493 case MatchOp::TypeExp:
CID 12457 - FORWARD_NULL
Dynamic cast to pointer "dynamic_cast <MatchExpOp *>(op)" can return NULL.
Assigning: "exp" = "dynamic_cast <MatchExpOp *>(op)".
494 exp = dynamic_cast <MatchExpOp *> (op);
CID 12457 - FORWARD_NULL
Passing null pointer "exp->e" to function "boost::shared_ptr<CompMatch::Expression>::get() const", which dereferences it.
495 if (exp->e.get ())
496 value = exp->e->evaluate (w);
497 else
498 value = true;
499 break;