diff --git a/README.md b/README.md
index 50338c10..157df89f 100644
--- a/README.md
+++ b/README.md
@@ -277,8 +277,9 @@ Here are the Go packages that can be imported correctly:
 * [log](https://pkg.go.dev/log)
 * [flag](https://pkg.go.dev/flag)
 * [sort](https://pkg.go.dev/sort)
-* [strconv](https://pkg.go.dev/strconv)
+* [bytes](https://pkg.go.dev/bytes)
 * [strings](https://pkg.go.dev/strings)
+* [strconv](https://pkg.go.dev/strconv)
 * [path](https://pkg.go.dev/path)
 * [path/filepath](https://pkg.go.dev/path/filepath)
 * [sync/atomic](https://pkg.go.dev/sync/atomic)
@@ -290,6 +291,8 @@ Here are the Go packages that can be imported correctly:
 * [fmt](https://pkg.go.dev/fmt) (partially)
 * [reflect](https://pkg.go.dev/reflect) (partially)
 * [time](https://pkg.go.dev/time) (partially)
+* [regexp](https://pkg.go.dev/regexp)
+* [regexp/syntax](https://pkg.go.dev/regexp/syntax)
 
 
 ## Dependencies
diff --git a/_cmptest/_regexdemo/regex.go b/_cmptest/regexdemo/regex.go
similarity index 100%
rename from _cmptest/_regexdemo/regex.go
rename to _cmptest/regexdemo/regex.go
diff --git a/internal/lib/sync/pool.go b/internal/lib/sync/pool.go
index 98d5a11e..6d247ea9 100644
--- a/internal/lib/sync/pool.go
+++ b/internal/lib/sync/pool.go
@@ -24,6 +24,10 @@ type Pool struct {
 func (p *Pool) Put(x any) {
 }
 
+// TODO(xsw):
 func (p *Pool) Get() any {
-	return p.New()
+	if p.New != nil {
+		return p.New()
+	}
+	return nil
 }