Fix merge bug

lua/cmp/utils/misc.lua

@@ -21,8 +21,8 @@ end
 ---@param v2 T
 ---@return T
 misc.merge = function(v1, v2)
-  local merge1 = type(v1) == "table" and not vim.tbl_islist(v1)
-  local merge2 = type(v2) == "table" and not vim.tbl_islist(v1)
+  local merge1 = type(v1) == "table" and (not vim.tbl_islist(v1) or vim.tbl_isempty(v1))
+  local merge2 = type(v2) == "table" and (not vim.tbl_islist(v1) or vim.tbl_isempty(v1))
   if merge1 and merge2 then
     local new_tbl = {}
     for k, v in pairs(v2) do

lua/cmp/utils/misc_spec.lua

@@ -0,0 +1,29 @@
+local spec = require('cmp.utils.spec')
+
+local misc = require('cmp.utils.misc')
+
+describe('misc', function()
+  before_each(spec.before)
+
+  it('merge', function()
+    local merged
+    merged = misc.merge({
+      a = {}
+    }, {
+      a = {
+        b = 1
+      }
+    })
+    assert.are.equal(merged.a.b, 1)
+    merged = misc.merge({
+      a = false
+    }, {
+      a = {
+        b = 1
+      }
+    })
+    assert.are.equal(merged.a, false)
+
+  end)
+end)
+