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

verify/fuzz.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"math/rand"
 	"regexp"
+	"runtime"
 	"strconv"
 	"strings"
 	"unsafe"
@@ -192,7 +193,7 @@ func (k *Kernel) FuzzFunc(name string, sig funcSig, goCode []byte, iterations in
 			if result.FirstFail == "" {
 				result.FirstFail = fmt.Sprintf("iter %d: gasm call: %v", i, err)
 			}
-			releaseBufs(bufs)
+			runtime.KeepAlive(bufs)
 			continue
 		}
 
@@ -203,7 +204,7 @@ func (k *Kernel) FuzzFunc(name string, sig funcSig, goCode []byte, iterations in
 			if result.FirstFail == "" {
 				result.FirstFail = fmt.Sprintf("iter %d: go call: %v", i, err)
 			}
-			releaseBufs(bufs)
+			runtime.KeepAlive(bufs)
 			continue
 		}
 
@@ -221,7 +222,7 @@ func (k *Kernel) FuzzFunc(name string, sig funcSig, goCode []byte, iterations in
 		} else {
 			result.Matches++
 		}
-		releaseBufs(bufs)
+		runtime.KeepAlive(bufs)
 	}
 	return result
 }
@@ -384,9 +385,3 @@ func equalBytes(a, b []byte) bool {
 	}
 	return true
 }
-
-func releaseBufs(bufs [][]byte) {
-	// Keep buffers alive until after the call; nothing to free in Go,
-	// but this prevents the compiler from collecting them too early.
-	_ = bufs
-}