labath wrote:
The script code is not an exact equivalent of the "frame var" expression.
Notice how in the "frame var", you explicitly dereference the object, while in
the script, you call GetChildAtIndex directly on the pointer value. The "frame
var" expression would be more similar to `script
lldb.frame.FindVariable("ptr1").Dereference().GetChildAtIndex(0)`, and I'd
guess (I didn't try reproducing this) that this will print the map member
correctly.
That doesn't quite explain why is this failing, it might give us a clue about
what could be happening. I suspect the problem here is that the map data
formatter is just misbehaving when given a pointer value, and the
implementation happens to end up returning the parent of the actual pair value.
According to grep the `__cc_` member is used in the c++03 implementation of the
map, and I don't think many people use/test the data formatters in c++03 mode,
so it's kind of surprising that the formatter works at all.
https://github.com/llvm/llvm-project/pull/156033
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