Reset {n} after reload

Fix #2611

CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 ------
 - Preview window is `hidden` by default when there are `preview` bindings but
   `--preview` command is not given
+- Fixed bug where `{n}` is not properly reset on `reload`
 - Vim plugin
     - `sinklist` is added as a synonym to `sink*` so that it's easier to add
       a function to a spec dictionary

src/core.go

@@ -233,6 +233,7 @@ func Run(opts *Options, version string, revision string) {
 		clearCache = util.Once(true)
 		clearSelection = util.Once(true)
 		chunkList.Clear()
+		itemIndex = 0
 		header = make([]string, 0, opts.HeaderLines)
 		go reader.restart(command)
 	}

test/test_go.rb

@@ -2053,6 +2053,22 @@ class TestGoFZF < TestBase
     tmux.send_keys 'dabcd'
     tmux.until { |lines| assert_equal '> abcd', lines[-1] }
   end
+
+  def test_item_index_reset_on_reload
+    tmux.send_keys "seq 10 | #{FZF} --preview 'echo [[{n}]]' --bind 'up:last,down:first,space:reload:seq 100'", :Enter
+    tmux.until { |lines| assert_includes lines[1], '[[0]]' }
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines[1], '[[9]]' }
+    tmux.send_keys :Down
+    tmux.until { |lines| assert_includes lines[1], '[[0]]' }
+    tmux.send_keys :Space
+    tmux.until do |lines|
+      assert_equal 100, lines.item_count
+      assert_includes lines[1], '[[0]]'
+    end
+    tmux.send_keys :Up
+    tmux.until { |lines| assert_includes lines[1], '[[99]]' }
+  end
 end
 
 module TestShell