diff --git a/src/runtime/pprof/mprof_test.go b/src/runtime/pprof/mprof_test.go
index d15102c703..0fff9d46d9 100644
--- a/src/runtime/pprof/mprof_test.go
+++ b/src/runtime/pprof/mprof_test.go
@@ -82,7 +82,7 @@ func TestMemoryProfiler(t *testing.T) {
 #	0x[0-9,a-f]+	runtime/pprof_test\.TestMemoryProfiler\+0x[0-9,a-f]+	.*/runtime/pprof/mprof_test.go:61
 `, (1<<10)*memoryProfilerRun, (1<<20)*memoryProfilerRun),
 
-		fmt.Sprintf(`0: 0 \[%v: %v\] @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+
+		fmt.Sprintf(`0: 0 \[%v: %v\] @ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+ 0x[0-9,a-f]+
 #	0x[0-9,a-f]+	runtime/pprof_test\.allocateTransient2M\+0x[0-9,a-f]+	.*/runtime/pprof/mprof_test.go:27
 #	0x[0-9,a-f]+	runtime/pprof_test\.TestMemoryProfiler\+0x[0-9,a-f]+	.*/runtime/pprof/mprof_test.go:62
 `, memoryProfilerRun, (2<<20)*memoryProfilerRun),
diff --git a/src/runtime/slice.go b/src/runtime/slice.go
index f9414d7658..873e97ebff 100644
--- a/src/runtime/slice.go
+++ b/src/runtime/slice.go
@@ -55,7 +55,12 @@ func makeslice(t *slicetype, len64, cap64 int64) slice {
 		panic(errorString("makeslice: cap out of range"))
 	}
 
-	p := newarray(t.elem, uintptr(cap))
+	et := t.elem
+	var flags uint32
+	if et.kind&kindNoPointers != 0 {
+		flags = flagNoScan
+	}
+	p := mallocgc(et.size*uintptr(cap), et, flags)
 	return slice{p, len, cap}
 }
 
@@ -130,7 +135,7 @@ func growslice(t *slicetype, old slice, cap int) slice {
 		memclr(add(p, lenmem), capmem-lenmem)
 	} else {
 		// Note: can't use rawmem (which avoids zeroing of memory), because then GC can scan uninitialized memory.
-		p = newarray(et, uintptr(newcap))
+		p = mallocgc(capmem, et, 0)
 		if !writeBarrier.enabled {
 			memmove(p, old.array, lenmem)
 		} else {