patch 8.0.0484: :lhelpgrep does not fail after a successful one commit https://github.com/vim/vim/commit/ee85df37634dfb0c40ae5de0b4f246aef460b392 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 19 14:19:50 2017 +0100 patch 8.0.0484: :lhelpgrep does not fail after a successful one Problem: Using :lhelpgrep with an argument that should fail does not produce an error if the previous :helpgrep worked. Solution: Use another way to detect that autocommands made the quickfix info invalid. (Yegappan Lakshmanan)

is<F4>foo
{'silent': 0, 'noremap': 0, 'lhs': 'foo<C-V>', 'mode': ' ', 'nowait': 0, 'expr': 0, 'sid': 0, 'rhs': 'is<F4>foo', 'buffer': 0}
{'silent': 1, 'noremap': 1, 'lhs': 'bar', 'mode': 'v', 'nowait': 0, 'expr': 1, 'sid': 0, 'rhs': 'isbar', 'buffer': 1}
{'silent': 0, 'noremap': 0, 'lhs': 'foo', 'mode': ' ', 'nowait': 1, 'expr': 0, 'sid': 0, 'rhs': 'bar', 'buffer': 1}
xrx
yRy
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