[sword-devel] Crash when getting module type

[David "Judah's Shadow" Blue]

On Wednesday, October 25, 2023 6:22:54 PM EDT Donna Whisnant wrote:
> David,
>
> Based on the code you are showing, I can pretty much guarantee you that your
> segfault is caused by tempMod being a null pointer -- i.e. that the value
> of the map element you are iterating is null.

Ok, I didn't know that there could be null elements in the map.

> Your code needs to be more defensive and check if tempMod is a nullptr
> before dereferencing it.  Adding an 'if' around that code block should fix
> your segfault problem.



> But you'll have to determine why some module
> entries in your map are nulls -- perhaps you missed loading modules or
> something? Your code snippet doesn't show any of those details...  it only
> shows iterating something that appears to be a std::map.

Do you have to do something to load modules? When my program initializes, I do
this

swordLibrary = new sword::SWMgr(new sword::MarkupFilterMgr(sword::FMT_PLAIN));
and then pass a pointer to that around my various classes.

In this particular function,  the iterator is this,

sword::ModMap::iterator libraryIterator;

I had thought I was following one of the examples.
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