[foreign-jextract] Closing sliced segment closes original segment

[Filip Krakowski]

Hi,

I had a couple of IllegalStateExceptions stating that the segment I 
tried to close was already closed. After some debugging I found out this 
is caused by using a try-with-resources statement in combination with a 
MemorySegment (slice) returned by a field access ( try(var slice = 
struct.field$addr(originalsegment) { ... } ). After the statement the 
slice gets closed which also happens to close the original 
MemorySegment. I find this very confusing and would like to ask if this 
is intended behaviour or a bug.

Best regards,
Filip
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