Fix --info inline-right:PREFIX not clearing previous output

Close #4953

CHANGELOG.md

@@ -1,6 +1,10 @@
 CHANGELOG
 =========
 
+0.75.1
+------
+- Fixed `--info inline-right:PREFIX` leaving part of the previous output when the info gets shorter (#4953)
+
 0.75.0
 ------
 - Added `{change,transform,bg-transform}-info-command` actions (#4951) (@casperdcl)
@@ -30,6 +34,7 @@ CHANGELOG
       ```
 - Fixed `--no-sort` being ignored in filter mode with `--sync`, `--tac`, or `--bench` (#4940) (@NavpreetSSidhu)
 - Fixed `--walker=follow` skipping a symlink in one `--walker-root` when its target is an ancestor of another root (#4944) (@mabunemeh)
+- Fixed data races in the preview and the search result cache (#4947)
 - Fixed O(n^2) action parsing in `--listen`. A single ~1 MB request could block the server for ~30 s (@zachariah-mithani, AploSec)
 - Windows
     - Fixed `--with-shell` on Windows not detecting cmd, PowerShell, and pwsh, which made fzf quote commands and entries for a POSIX shell (#4936) (@vimkim)

RELEASE.md

@@ -22,7 +22,7 @@ triggered by a tag push.
 3. Verify file consistency, sign the tag, and push the tag.
 
     ```sh
-    make tag VERSION=0.74.5
+    make tag VERSION=0.75.0
     ```
 
     `make tag` runs `prerelease` first (checks that the version
@@ -54,8 +54,8 @@ The release stays a draft. Do not push `master` until it is published.
 - Publish without MSIs and submit to winget by hand:
 
     ```sh
-    gh release edit v0.74.5 --draft=false
-    gh workflow run winget.yml -f release-tag=v0.74.5
+    gh release edit v0.75.0 --draft=false
+    gh workflow run winget.yml -f release-tag=v0.75.0
     ```
 
 ## Testing the workflow

install

@@ -2,7 +2,7 @@
 
 set -u
 
-version=0.74.5
+version=0.75.0
 auto_completion=
 key_bindings=
 update_config=2

install.ps1

@@ -1,4 +1,4 @@
-$version="0.74.5"
+$version="0.75.0"
 
 $fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
 

main.go

@@ -11,7 +11,7 @@ import (
 	"github.com/junegunn/fzf/src/protector"
 )
 
-var version = "0.74"
+var version = "0.75"
 var revision = "devel"
 
 //go:embed shell/key-bindings.bash

man/man1/fzf-tmux.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf\-tmux 1 "Oct 2026" "fzf 0.74.5" "fzf\-tmux - open fzf in tmux split pane"
+.TH fzf\-tmux 1 "Nov 2026" "fzf 0.75.0" "fzf\-tmux - open fzf in tmux split pane"
 
 .SH NAME
 fzf\-tmux - open fzf in tmux split pane

man/man1/fzf.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf 1 "Oct 2026" "fzf 0.74.5" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "Nov 2026" "fzf 0.75.0" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder

src/matcher.go

@@ -137,13 +137,17 @@ func (m *Matcher) Loop() {
 			m.scanMutex.Lock()
 			result = m.scan(request)
 			m.scanMutex.Unlock()
+			// Not on a cached merger, which the terminal may be reading. It
+			// already has the same value.
+			if result.merger != nil {
+				result.merger.final = request.final
+			}
 		}
 
 		if !result.cancelled {
 			if result.cacheable() {
 				m.mergerCache[patternString] = result
 			}
-			result.merger.final = request.final
 			m.eventBox.Set(EvtSearchFin, result)
 		}
 	}

src/terminal.go

@@ -843,6 +843,8 @@ type previewRequest struct {
 	list         [3][]*Item // current, select, and all matched items
 	env          []string
 	query        string
+	lastAction   actionType
+	prompt       string
 }
 
 type previewResult struct {
@@ -3662,7 +3664,10 @@ func (t *Terminal) printInfoImpl() {
 				pos++
 			}
 		} else {
-			pos = max(pos, t.window.Width()-outputLen-util.StringWidth(t.infoPrefix)-1)
+			move(line, pos, false)
+			newPos := max(pos, t.window.Width()-outputLen-util.StringWidth(t.infoPrefix)-1)
+			t.window.Print(strings.Repeat(" ", newPos-pos))
+			pos = newPos
 			printInfoPrefix()
 		}
 	}
@@ -6458,6 +6463,8 @@ func (t *Terminal) Loop() error {
 				var commandTemplate string
 				var env []string
 				var query string
+				var lastAction actionType
+				var prompt string
 				initialOffset := 0
 				t.previewBox.Wait(func(events *util.Events) {
 					for req, value := range *events {
@@ -6472,6 +6479,8 @@ func (t *Terminal) Loop() error {
 							items = request.list
 							env = request.env
 							query = request.query
+							lastAction = request.lastAction
+							prompt = request.prompt
 							requested = true
 						}
 					}
@@ -6486,7 +6495,18 @@ func (t *Terminal) Loop() error {
 				version++
 				// We don't display preview window if no match
 				if items[0] != nil {
-					command, tempFiles := t.replacePlaceholder(commandTemplate, false, query, items)
+					// Not t.replacePlaceholder, which reads fields the main loop writes
+					command, tempFiles := replacePlaceholder(replacePlaceholderParams{
+						template:   commandTemplate,
+						stripAnsi:  t.ansi,
+						delimiter:  t.delimiter,
+						printsep:   t.printsep,
+						query:      query,
+						allItems:   items,
+						lastAction: lastAction,
+						prompt:     prompt,
+						executor:   t.executor,
+					})
 					cmd := t.executor.ExecCommand(command, true)
 					cmd.Env = env
 
@@ -6619,7 +6639,7 @@ func (t *Terminal) Loop() error {
 		if len(command) > 0 && t.canPreview() {
 			_, list := t.buildPlusList(command, false)
 			t.cancelPreview()
-			t.previewBox.Set(reqPreviewEnqueue, previewRequest{command, t.evaluateScrollOffset(), list, t.environForPreview(), string(t.input)})
+			t.previewBox.Set(reqPreviewEnqueue, previewRequest{command, t.evaluateScrollOffset(), list, t.environForPreview(), string(t.input), t.lastAction, t.promptString})
 		}
 	}
 
@@ -7234,7 +7254,7 @@ func (t *Terminal) Loop() error {
 						if valid {
 							t.cancelPreview()
 							t.previewBox.Set(reqPreviewEnqueue,
-								previewRequest{t.previewOpts.command, t.evaluateScrollOffset(), list, t.environForPreview(), string(t.input)})
+								previewRequest{t.previewOpts.command, t.evaluateScrollOffset(), list, t.environForPreview(), string(t.input), t.lastAction, t.promptString})
 						}
 					} else {
 						// Discard the preview content so that it won't accidentally appear

test/test_core.rb

@@ -1792,6 +1792,13 @@ class TestCore < TestInteractive
     tmux.until { assert_match(%r{     0/100000}, it[-1]) }
   end
 
+  def test_info_inline_right_prefix_clearance
+    tmux.send_keys "seq 100000 | #{FZF} --info 'inline-right:xx '", :Enter
+    tmux.until { assert_match(%r{xx 100000/100000}, it[-1]) }
+    tmux.send_keys 'x'
+    tmux.until { assert_match(%r{     xx 0/100000}, it[-1]) }
+  end
+
   def test_info_command
     tmux.send_keys(%(seq 10000 | #{FZF} --separator x --info-command 'echo -e "--\\x1b[33m$FZF_POS\\x1b[m/$FZF_INFO--"'), :Enter)
     tmux.until { assert_match(%r{^  --1/10000/10000-- xx}, it[-2]) }

test/test_preview.rb

@@ -640,6 +640,15 @@ class TestPreview < TestInteractive
     end
   end
 
+  def test_preview_action_and_prompt
+    tmux.send_keys %(seq 100 | #{FZF} --preview 'echo [$FZF_ACTION/$FZF_PROMPT/{q}]' --bind 'space:change-prompt(foo> )'), :Enter
+    tmux.until { |lines| assert lines.any_include?('[start/> /]') }
+    tmux.send_keys '1'
+    tmux.until { |lines| assert lines.any_include?('[char/> /1]') }
+    tmux.send_keys :Space, '2'
+    tmux.until { |lines| assert lines.any_include?('[char/foo> /12]') }
+  end
+
   def test_preview_wrap_sign_between_ansi_fragments
     tmux.send_keys %(seq 1 | #{FZF} --preview 'echo -e "\\x1b[33m1234567890 \\x1b[mhello"; echo -e "\\x1b[33m1234567890 \\x1b[mhello"' --preview-window 10,wrap-word), :Enter
     tmux.until do |lines|