Cause:
There are many possible reasons for this diagnostic message being emitted by the Intel C++ Compiler. One is from the lambda usage in the code and the option /Qstd=c++0x (-std=c++0x for Linux* and Mac OS* X) is not specified in the compiler options.

Example:

t.cpp 

Compiler does not vectorize the loop stating "condition may protect exception".

Cause:
When declaring a parameter with the type of an abstract base class

Example:

class CBase { virtual void foo() = 0; }; 
class A: public CBase {
    void foo(); 
}; 
void testfoo(CBase b); // not allowed since the class is abstract 
void testfoo_ok(A b); // ok 
void testfoo_ok2(CBase* pB); // ok

Command line output:

Compiler reports warning #181: argument is incompatible with corresponding format string conversion