fix(verify): fix flaky JIT tests with global buffers and KeepAlive

verify/coverage_test.go

@@ -4,6 +4,7 @@
 package verify
 
 import (
+	"runtime"
 	"testing"
 	"unsafe"
 )
@@ -44,6 +45,7 @@ func TestProfilePaths(t *testing.T) {
 
 	// Build a corpus of varied LZ4 blocks.
 	var argSets [][]byte
+	var liveDsts [][]byte // keep dst buffers alive across ProfilePaths
 	blocks := []struct {
 		src     []byte
 		dstSize int
@@ -63,6 +65,7 @@ func TestProfilePaths(t *testing.T) {
 		PutUint64(args, 8, uint64(len(b.src)))
 		PutUint64(args, 16, uint64(cap(b.src)))
 		dst := make([]byte, b.dstSize)
+		liveDsts = append(liveDsts, dst)
 		if len(dst) > 0 {
 			PutPtr(args, 24, unsafe.Pointer(&dst[0]))
 		}
@@ -73,6 +76,8 @@ func TestProfilePaths(t *testing.T) {
 
 	// Result offsets: n+48 and code+56.
 	paths, err := k.ProfilePaths("decodeBlockAVX2", argSets, []int{48, 56})
+	runtime.KeepAlive(blocks)
+	runtime.KeepAlive(liveDsts)
 	if err != nil {
 		t.Fatalf("ProfilePaths: %v", err)
 	}