io.github.libtmux.Buffers.Buffers.EXACT_NAMED_DELETE

tmux's own history dates the fix to 0f6227f4 ("When deleting or renaming a buffer and a buffer name is specified, complain if the buffer doesn't exist instead of silently deleting or renaming the most recent buffer", GitHub issue 3205); git tag --contains places it on 3.4 and nothing earlier, so 3.3 and 3.3a both have the bug. Confirmed on the matrix: set-buffer -b a x; set-buffer -b b y; delete-buffer -b nope answers unknown buffer: nope on 3.4 and leaves both buffers, but on 3.3a it exits 0 and takes b, the one delete-buffer was never told to touch.