bug(picker): jumping to a terminal buffer fails with "Invalid cursor line: out of range"

[truls27a]

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Neovim version (nvim -v)

NVIM v0.12.4

Operating system/version

macOS 26.5.2

Describe the bug

Confirming a terminal buffer in the buffers picker sometimes fails with:

vim.schedule callback: .../snacks/picker/actions.lua:149: Invalid cursor line: out of range
stack traceback:
        [C]: in function 'nvim_win_set_cursor'
        .../snacks/picker/actions.lua:149: in function 'jump'
        .../snacks/picker/actions.lua:42: in function <.../snacks/picker/actions.lua:41>

A terminal buffer has one line per row of the window showing it, and Neovim resizes the pty to whatever window displays it. M.file previews a loaded buffer by putting the real buffer in the preview window (picker/preview.lua:110), which shrinks a terminal buffer to the preview's height. With the default layout and lines=60 that is 58 lines down to 46.

The buffers source snapshots pos before that happens (picker/source/buffers.lua:41), and for a terminal you just used it is the last line. M.jump then runs :buffer and sets the cursor on the next line, before the pty has resized back, so it asks for line 58 of a 46-line buffer.

The jump itself succeeds, only the cursor restore is skipped, so the error is cosmetic.

Steps To Reproduce

1. :terminal, run something short like git status
2. leave the cursor on the last line and switch to another buffer
3. Snacks.picker.buffers(), select the terminal, press <cr>

Expected Behavior

Jumping to a buffer with fewer lines than when the picker was opened should place the cursor on the last line instead of raising.

Repro

Reproduces without the picker, using a float of the preview's height:

vim.o.lines = 40
vim.cmd("terminal")
local term = vim.api.nvim_get_current_buf()
vim.fn.chansend(vim.bo[term].channel, "clear; git status --short\n")
vim.wait(1500)
vim.cmd("redraw")
vim.cmd("normal! G")
local pos = vim.api.nvim_win_get_cursor(0)[1] -- 38, the window height
vim.cmd("enew")

-- what the preview does
local float = vim.api.nvim_open_win(term, false, {
  relative = "editor", row = 2, col = 2, width = 60, height = 15, style = "minimal",
})
vim.wait(1500)
vim.cmd("redraw")
vim.api.nvim_win_close(float, true)

vim.cmd("buffer " .. term)
print(vim.api.nvim_buf_line_count(term)) -- 15, not 38
vim.api.nvim_win_set_cursor(0, { pos, 0 }) -- Invalid cursor line: out of range

Proposed Fix

Clamp the line in M.jump:

   if pos and pos[1] > 0 then
-    vim.api.nvim_win_set_cursor(win, { pos[1], pos[2] })
+    local last_line = vim.api.nvim_buf_line_count(vim.api.nvim_win_get_buf(win))
+    vim.api.nvim_win_set_cursor(win, { math.min(pos[1], last_line), pos[2] })
     vim.cmd("norm! zzzv")

The column needs no guard, nvim_win_set_cursor already clamps it. Happy to open a PR.