What version of Go are you using (go version)?

$ go version
go version go1.13.3 darwin/amd64

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/arsenegandote/Library/Caches/go-build"
GOENV="/Users/arsenegandote/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/arsenegandote/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/Cellar/go/1.13.3/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.13.3/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/_9/v2g8jyjj051bj38hln17lchw0000gn/T/go-build584306134=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

go test -mod=vendor <folder>

What did you expect to see?

At least the test should run

What did you see instead?

runtime/cgo

In file included from _cgo_export.c:3: /usr/local/include/stdlib.h:134:25: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:134:25: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:134:25: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:135:22: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:135:22: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:135:22: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:136:23: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:136:23: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:136:23: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:139:20: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:139:20: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:139:20: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:141:26: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:141:26: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:141:26: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:141:45: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:141:45: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:141:45: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:142:59: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:142:59: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:142:59: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:142:73: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:142:73: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:142:73: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:141:6: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:141:6: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:141:6: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:147:25: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:147:25: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:147:25: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:147:6: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:147:6: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:147:6: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:156:23: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:156:23: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:156:23: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:157:26: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:157:26: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:157:26: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:157:52: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:157:52: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:157:52: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:158:21: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:158:21: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:158:21: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:158:46: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:158:46: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:158:46: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:160:18: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:160:18: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:160:18: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:161:43: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:161:43: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:161:43: note: insert ‘_Nonnull’ if the pointer should never be null /usr/local/include/stdlib.h:161:57: error: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Werror,-Wnullability-completeness] /usr/local/include/stdlib.h:161:57: note: insert ‘_Nullable’ if the pointer may be null /usr/local/include/stdlib.h:161:57: note: insert ‘_Nonnull’ if the pointer should never be null fatal error: too many errors emitted, stopping now [-ferror-limit=]

Compilation finished with exit code 2