diff --git a/src/cmd/go/internal/cache/prog.go b/src/cmd/go/internal/cache/prog.go
index 0f51021298bbc7..cbd495642cb9c5 100644
--- a/src/cmd/go/internal/cache/prog.go
+++ b/src/cmd/go/internal/cache/prog.go
@@ -204,6 +204,7 @@ func (c *ProgCache) send(ctx context.Context, req *cacheprog.Request) (*cachepro
 func (c *ProgCache) writeToChild(req *cacheprog.Request, resc chan<- *cacheprog.Response) (err error) {
 	c.mu.Lock()
 	if c.inFlight == nil {
+		c.mu.Unlock()
 		return errCacheprogClosed
 	}
 	c.nextID++
diff --git a/src/cmd/go/internal/modfetch/cache.go b/src/cmd/go/internal/modfetch/cache.go
index 4d7e2b1bfc88b3..2e6e7a5048034b 100644
--- a/src/cmd/go/internal/modfetch/cache.go
+++ b/src/cmd/go/internal/modfetch/cache.go
@@ -781,7 +781,7 @@ func rewriteVersionList(ctx context.Context, dir string) (err error) {
 	}
 	if fi, err := f.Stat(); err == nil && int(fi.Size()) == buf.Len() {
 		old := make([]byte, buf.Len()+1)
-		if n, err := f.ReadAt(old, 0); err == io.EOF && n == buf.Len() && bytes.Equal(buf.Bytes(), old) {
+		if n, err := f.ReadAt(old, 0); err == io.EOF && n == buf.Len() && bytes.Equal(buf.Bytes(), old[:n]) {
 			return nil // No edit needed.
 		}
 	}
diff --git a/src/html/template/transition.go b/src/html/template/transition.go
index ea4b272cc241db..05b6abd03d1772 100644
--- a/src/html/template/transition.go
+++ b/src/html/template/transition.go
@@ -426,7 +426,7 @@ func tJSDelimited(c context, s []byte) (context, int) {
 			// If "</script" appears in a regex literal, the '/' should not
 			// close the regex literal, and it will later be escaped to
 			// "\x3C/script" in escapeText.
-			if i > 0 && i+7 <= len(s) && bytes.Equal(bytes.ToLower(s[i-1:i+7]), []byte("</script")) {
+			if i > 0 && i+7 <= len(s) && bytes.EqualFold(s[i-1:i+7], []byte("</script")) {
 				i++
 			} else if !inCharset {
 				c.state, c.jsCtx = stateJS, jsCtxDivOp
diff --git a/src/internal/goexperiment/exp_goroutineleakprofile_off.go b/src/internal/goexperiment/exp_goroutineleakprofile_off.go
deleted file mode 100644
index 63eafe9e6c74db..00000000000000
--- a/src/internal/goexperiment/exp_goroutineleakprofile_off.go
+++ /dev/null
@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build !goexperiment.goroutineleakprofile
-
-package goexperiment
-
-const GoroutineLeakProfile = false
-const GoroutineLeakProfileInt = 0
diff --git a/src/internal/goexperiment/exp_goroutineleakprofile_on.go b/src/internal/goexperiment/exp_goroutineleakprofile_on.go
deleted file mode 100644
index 28a662eceb46f8..00000000000000
--- a/src/internal/goexperiment/exp_goroutineleakprofile_on.go
+++ /dev/null
@@ -1,8 +0,0 @@
-// Code generated by mkconsts.go. DO NOT EDIT.
-
-//go:build goexperiment.goroutineleakprofile
-
-package goexperiment
-
-const GoroutineLeakProfile = true
-const GoroutineLeakProfileInt = 1
diff --git a/src/net/http/pprof/pprof.go b/src/net/http/pprof/pprof.go
index 71aade67d32046..5c45c537bcc90a 100644
--- a/src/net/http/pprof/pprof.go
+++ b/src/net/http/pprof/pprof.go
@@ -77,7 +77,6 @@ import (
 	"fmt"
 	"html"
 	"internal/godebug"
-	"internal/goexperiment"
 	"internal/profile"
 	"io"
 	"log"
@@ -362,22 +361,17 @@ var profileSupportsDelta = map[handler]bool{
 }
 
 var profileDescriptions = map[string]string{
-	"allocs":       "A sampling of all past memory allocations",
-	"block":        "Stack traces that led to blocking on synchronization primitives",
-	"cmdline":      "The command line invocation of the current program",
-	"goroutine":    "Stack traces of all current goroutines. Use debug=2 as a query parameter to export in the same format as an unrecovered panic.",
-	"heap":         "A sampling of memory allocations of live objects. You can specify the gc GET parameter to run GC before taking the heap sample.",
-	"mutex":        "Stack traces of holders of contended mutexes",
-	"profile":      "CPU profile. You can specify the duration in the seconds GET parameter. After you get the profile file, use the go tool pprof command to investigate the profile.",
-	"symbol":       "Maps given program counters to function names. Counters can be specified in a GET raw query or POST body, multiple counters are separated by '+'.",
-	"threadcreate": "Stack traces that led to the creation of new OS threads",
-	"trace":        "A trace of execution of the current program. You can specify the duration in the seconds GET parameter. After you get the trace file, use the go tool trace command to investigate the trace.",
-}
-
-func init() {
-	if goexperiment.GoroutineLeakProfile {
-		profileDescriptions["goroutineleak"] = "Stack traces of all leaked goroutines. Use debug=2 as a query parameter to export in the same format as an unrecovered panic."
-	}
+	"allocs":        "A sampling of all past memory allocations",
+	"block":         "Stack traces that led to blocking on synchronization primitives",
+	"cmdline":       "The command line invocation of the current program",
+	"goroutine":     "Stack traces of all current goroutines. Use debug=2 as a query parameter to export in the same format as an unrecovered panic.",
+	"heap":          "A sampling of memory allocations of live objects. You can specify the gc GET parameter to run GC before taking the heap sample.",
+	"mutex":         "Stack traces of holders of contended mutexes",
+	"profile":       "CPU profile. You can specify the duration in the seconds GET parameter. After you get the profile file, use the go tool pprof command to investigate the profile.",
+	"symbol":        "Maps given program counters to function names. Counters can be specified in a GET raw query or POST body, multiple counters are separated by '+'.",
+	"threadcreate":  "Stack traces that led to the creation of new OS threads",
+	"trace":         "A trace of execution of the current program. You can specify the duration in the seconds GET parameter. After you get the trace file, use the go tool trace command to investigate the trace.",
+	"goroutineleak": "Stack traces of all leaked goroutines. Use debug=2 as a query parameter to export in the same format as an unrecovered panic.",
 }
 
 type profileEntry struct {
diff --git a/src/runtime/crash_test.go b/src/runtime/crash_test.go
index 77afdc069005d4..723f25085840df 100644
--- a/src/runtime/crash_test.go
+++ b/src/runtime/crash_test.go
@@ -194,21 +194,6 @@ func buildTestProg(t *testing.T, binary string, flags ...string) (string, error)
 		cmd.Dir = "testdata/" + binary
 		cmd = testenv.CleanCmdEnv(cmd)
 
-		// If tests need any experimental flags, add them here.
-		//
-		// TODO(vsaioc): Remove `goroutineleakprofile` once the feature is no longer experimental.
-		edited := false
-		for i := range cmd.Env {
-			e := cmd.Env[i]
-			if _, vars, ok := strings.Cut(e, "GOEXPERIMENT="); ok {
-				cmd.Env[i] = "GOEXPERIMENT=" + vars + ",goroutineleakprofile"
-				edited, _ = true, vars
-			}
-		}
-		if !edited {
-			cmd.Env = append(cmd.Env, "GOEXPERIMENT=goroutineleakprofile")
-		}
-
 		out, err := cmd.CombinedOutput()
 		if err != nil {
 			target.err = fmt.Errorf("building %s %v: %v\n%s", binary, flags, err, out)
diff --git a/src/runtime/goroutineleakprofile_test.go b/src/runtime/goroutineleakprofile_test.go
index 473edc92ec6b0e..d802b834ecb902 100644
--- a/src/runtime/goroutineleakprofile_test.go
+++ b/src/runtime/goroutineleakprofile_test.go
@@ -509,7 +509,6 @@ func TestGoroutineLeakProfile(t *testing.T) {
 
 				cmdEnv := []string{
 					"GODEBUG=asyncpreemptoff=1",
-					"GOEXPERIMENT=goroutineleakprofile",
 				}
 
 				if tcase.simple {
diff --git a/src/runtime/pprof/pprof.go b/src/runtime/pprof/pprof.go
index 2dc0ac18074684..1c116ad21dcd7b 100644
--- a/src/runtime/pprof/pprof.go
+++ b/src/runtime/pprof/pprof.go
@@ -80,7 +80,6 @@ import (
 	"cmp"
 	"fmt"
 	"internal/abi"
-	"internal/goexperiment"
 	"internal/profilerecord"
 	"io"
 	"runtime"
@@ -257,15 +256,13 @@ func lockProfiles() {
 	if profiles.m == nil {
 		// Initial built-in profiles.
 		profiles.m = map[string]*Profile{
-			"goroutine":    goroutineProfile,
-			"threadcreate": threadcreateProfile,
-			"heap":         heapProfile,
-			"allocs":       allocsProfile,
-			"block":        blockProfile,
-			"mutex":        mutexProfile,
-		}
-		if goexperiment.GoroutineLeakProfile {
-			profiles.m["goroutineleak"] = goroutineLeakProfile
+			"goroutine":     goroutineProfile,
+			"threadcreate":  threadcreateProfile,
+			"heap":          heapProfile,
+			"allocs":        allocsProfile,
+			"block":         blockProfile,
+			"mutex":         mutexProfile,
+			"goroutineleak": goroutineLeakProfile,
 		}
 	}
 }