Question

I found a similar question that threw the same exception, but it wasn’t helpful. No one answered: Getting "Single stepping until exit from function CALayerGetDelegate, which has no line number information." in iphone sdk

Sample parameter that works when program is aa+a+

Sample parameter that causes break when method called again by parameter program is aa+a+a. Why?

Here’s my code:

+(NSSet *)variablesUsedInsideProgram:(id)program
{

    NSMutableSet *variablesUsed = [NSMutableSet setWithArray:program];
    //put the program into a mutable set then pop off everything else that is !a,!b,!c

    id objectReferenceFromVariablesUsed = nil;
    for(objectReferenceFromVariablesUsed in variablesUsed) //breaks here
    {
        if (!([objectReferenceFromVariablesUsed isEqual:@"a"] | [objectReferenceFromVariablesUsed isEqual:@"b"] | [objectReferenceFromVariablesUsed isEqual:@"c"]))
        {
            [variablesUsed removeObject:objectReferenceFromVariablesUsed];
        }
    }
    return [variablesUsed copy];
}

DEBUG print out statements I get:

(gdb) po program<__NSArrayI 0x68a7a00>(a,a,+,a,+,a)

so I know my program pushed in variable a

(gdb) po variablesUsed
{(
    "+",
    a
)}

Unique values from program when added to NSMutableSet

What I know that is happening:

objectReferenceFromVariablesUsed = +, then it gets popped off the Set

(gdb) po variablesUsed {( a )}

Goes back into the loop then breaks. Gets Error Message "Single stepping until exit from function objc_exception_throw, which has no line number information. Catchpoint 2 (exception thrown).

Does anybody know what might be causing this?

Answer 1

FIXED!

+(NSSet *)variablesUsedInsideProgram:(id)program
{

NSMutableSet *variablesUsed = [NSMutableSet setWithArray:program];
NSMutableSet *variablesUsed1 = [NSMutableSet setWithArray:program]; **//HERE**
//put the program into a mutable set then pop off everything else that is !a,!b,!c

id objectReferenceFromVariablesUsed = nil;
for(objectReferenceFromVariablesUsed in variablesUsed) //breaks here
{
    if (!([objectReferenceFromVariablesUsed isEqual:@"a"] | [objectReferenceFromVariablesUsed isEqual:@"b"] | [objectReferenceFromVariablesUsed isEqual:@"c"]))
    {

        [variablesUsed1 removeObject:objectReferenceFromVariablesUsed];
    }
}
return [variablesUsed1 copy];

}