fix(lsp): check for valid buf before processing semantic tokens response

Problem: There is no check for buffer validity before processing
  semantic tokens response. This can lead to `Invalid buffer id` error
  if processing request takes a long time and the buffer is wiped out.

  For example, this can happen after by accident navigating to a buffer
  from different project which leads to first loading project's
  workspace and *then* processing semantic tokens. During that time
  a buffer can be wiped out, as navigation to it was by accident.

Solution: Add extra check for buffer validity before processing semantic
  tokens response.

0 files changed, 0 insertions, 0 deletions