Prevent panic in darwin AVX512 detection

2021-01-13 12:11:26 -05:00 · 2021-01-13 12:11:26 -05:00 · d373079f35
parent 59a82aea36
commit d373079f35
1 changed files with 1 additions and 1 deletions
--- a/cpu_darwin.go
+++ b/cpu_darwin.go
@ -17,6 +17,6 @@ func init() {
 	if !haveAVX512 {
 		// On some Macs, AVX512 detection is buggy, so fallback to sysctl
 		b, _ := syscall.Sysctl("hw.optional.avx512f")
-		haveAVX512 = b[0] == 1
+		haveAVX512 = len(b) > 0 && b[0] == 1
 	}
 }