bug: When doing a non-live grep, the picker window opens only after first match is found

[dapetcu21]

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Neovim version (nvim -v)

0.10.2

Operating system/version

Windows 11, Mac OS 15.0.1

Describe the bug

When doing a non-live grep, the picker window opens only after first match is found, which is confusing and makes cancelling the search impossible. show_empty makes no difference. Live greps don't suffer from this issue.

Steps To Reproduce

1. Have a large codebase, ideally on a slow disk or not recently accessed
2. lua Snacks.picker.grep({ search = "foo", live = false })
3. Notice that opening the picker window is slow and when it opens it always has at least one result

Expected Behavior

An empty picker window should open immediately after issuing the command and should be populated eventually when the first results come in from ripgrep.

Repro

vim.env.LAZY_STDPATH = ".repro"
load(vim.fn.system("curl -s https://raw.githubusercontent.com/folke/lazy.nvim/main/bootstrap.lua"))()

require("lazy.minit").repro({
  spec = {
    { "folke/snacks.nvim", opts = {} },
    -- add any other plugins here
  },
})