https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79443
--- Comment #2 from Dominik Vogt <vogt at linux dot vnet.ibm.com> --- Yes, that fixes it. Now there's another one in crypto/sha256. Do you want me to open another bug report for that? -- fallback_test.go:19:5: error: reference to undefined name 'useAsm' if useAsm == false { ^ fallback_test.go:22:2: error: reference to undefined name 'useAsm' useAsm = false ^ fallback_test.go:23:17: error: reference to undefined name 'useAsm' defer func() { useAsm = true }() ^ FAIL: crypto/sha256 --