When gdb starts showing all the possible constructors it cannot be inrterrupted

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For a huge design,
when I am trying some thing like

b 'xxxx::xxxx(  <tab>

it starts giving a huge list which cannot be interrupted. For huge
code base this can be painful till it alpahbetially or some other
predefined order shows all possible functions

I had to kill one gdb sessio after 2 hours of working.
looks like it is a bug, can sombody open a ticket for it