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fix(lua): use even safer and even better error() message conversion

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problem:
this crashes neovim:

ondska = setmetatable({}, {__tostring = error})
error(ondska)

solution:

make it not crash neovim
This commit is contained in:
bfredl
2026-05-20 21:02:00 +02:00
parent 526ae1cc1b
commit 24e23de721
7 changed files with 41 additions and 23 deletions
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7
test/functional/lua/overrides_spec.lua
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@@ -4,6 +4,7 @@ local n = require('test.functional.testnvim')()
local Screen = require('test.functional.ui.screen')
local eq = t.eq
local matches = t.matches
local NIL = vim.NIL
local feed = n.feed
local clear = n.clear
@@ -105,13 +106,13 @@ describe('print', function()
'Vim(lua):E5108: Lua: Xtest-functional-lua-overrides-luafile:2: 1234',
pcall_err(command, 'lua number_error()')
)
eq('Vim(lua):E5108: Lua: [NULL]', pcall_err(command, 'lua nil_error()'))
eq('Vim(lua):E5108: Lua: [NULL]', pcall_err(command, 'lua table_error()'))
eq('Vim(lua):E5108: Lua: nil', pcall_err(command, 'lua nil_error()'))
matches('^Vim%(lua%):E5108: Lua: table: 0x%x+$', pcall_err(command, 'lua table_error()'))
eq(
'Vim(lua):E5108: Lua: Internal Error [11234] my mistake',
pcall_err(command, 'lua custom_error()')
)
eq('Vim(lua):E5108: Lua: [NULL]', pcall_err(command, 'lua bad_custom_error()'))
eq('Vim(lua):E5108: Lua: [UNPRINTABLE ERROR]', pcall_err(command, 'lua bad_custom_error()'))
end)
it('prints strings with NULs and NLs correctly', function()
api.nvim_set_option_value('more', true, {})