To install:

1) chrome://extensions/
2) click "[+] Developer Mode" in top right
3) "Load unpacked extension..."
4) pick $GOROOT/misc/chrome/gophertool

    id: what-did-you-do
    attributes:
      label: "What did you do?"
      description: "If possible, provide a recipe for reproducing the error. Starting with a Private/Incognito tab/window may help rule out problematic browser extensions."
    validations:
      required: true
  - type: textarea
    id: actual-behavior
    attributes:
      label: "What did you see happen?"
    validations:
      required: true
  - type: textarea

The obvious thing for cgo to do is to process the preamble, expanding
#includes and processing the corresponding C code. That would require
a full C parser and type checker that was also aware of any extensions
known to the system compiler (for example, all the GNU C extensions) as
well as the system-specific header locations and system-specific
pre-#defined macros. This is certainly possible to do, but it is an
enormous amount of work.

pkg crypto/x509, type CertificateRequest struct, EmailAddresses []string
pkg crypto/x509, type CertificateRequest struct, Extensions []pkix.Extension
pkg crypto/x509, type CertificateRequest struct, ExtraExtensions []pkix.Extension
pkg crypto/x509, type CertificateRequest struct, IPAddresses []net.IP
pkg crypto/x509, type CertificateRequest struct, PublicKey interface{}

	// records, which are used to overcome USTAR's shortcomings, in addition to
	// providing the ability to have sub-second resolution for timestamps.
	//
	// Some newer formats add their own extensions to PAX by defining their
	// own keys and assigning certain semantic meaning to the associated values.
	// For example, sparse file support in PAX is implemented using keys
	// defined by the GNU manual (e.g., "GNU.sparse.map").

	BNEZ	X5, 2(PC)				// 63940200

	// Set pseudo-instructions
	SEQZ	X15, X15				// 93b71700
	SNEZ	X15, X15				// b337f000

	// F extension
	FABSS	F0, F1					// d3200020
	FNEGS	F0, F1					// d3100020
	FNES	F0, F1, X7				// d3a300a093c31300

	// D extension
	FABSD	F0, F1					// d3200022
	FNEGD	F0, F1					// d3100022
	FNED	F0, F1, X5				// d3a200a293c21200
	FLTD	F0, F1, X5				// d39200a2

pkg syscall (darwin-arm64), const SO_NOTIFYCONFLICT = 4134
pkg syscall (darwin-arm64), const SO_NOTIFYCONFLICT ideal-int
pkg syscall (darwin-arm64), const SO_NP_EXTENSIONS = 4227
pkg syscall (darwin-arm64), const SO_NP_EXTENSIONS ideal-int
pkg syscall (darwin-arm64), const SO_NREAD = 4128
pkg syscall (darwin-arm64), const SO_NREAD ideal-int
pkg syscall (darwin-arm64), const SO_NUMRCVPKT = 4370

pkg crypto/x509/pkix, type RevokedCertificate struct, Extensions []Extension
pkg crypto/x509/pkix, type RevokedCertificate struct, RevocationTime time.Time
pkg crypto/x509/pkix, type RevokedCertificate struct, SerialNumber *big.Int
pkg crypto/x509/pkix, type TBSCertificateList struct
pkg crypto/x509/pkix, type TBSCertificateList struct, Extensions []Extension
pkg crypto/x509/pkix, type TBSCertificateList struct, Issuer RDNSequence

pkg crypto/x509, method (*RevocationList) CheckSignatureFrom(*Certificate) error #50674
pkg crypto/x509, type RevocationList struct, AuthorityKeyId []uint8 #50674
pkg crypto/x509, type RevocationList struct, Extensions []pkix.Extension #50674
pkg crypto/x509, type RevocationList struct, Issuer pkix.Name #50674
pkg crypto/x509, type RevocationList struct, Raw []uint8 #50674
pkg crypto/x509, type RevocationList struct, RawIssuer []uint8 #50674

	"ulonglong":     "unsigned long long",
	"complexfloat":  "float _Complex",
	"complexdouble": "double _Complex",
}

var incomplete = "_cgopackage.Incomplete"

// cname returns the C name to use for C.s.
// The expansions are listed in nameToC and also
// struct_foo becomes "struct foo", and similarly for
// union and enum.
func cname(s string) string {
	if t, ok := nameToC[s]; ok {
		return t
	}