Closed
Description
from src/cmd/cgo/gcc.go:
1286 if isStructUnionClass(sub.Go) {
1287 // Use the typedef name for C code.
1288 typedef[sub.Go.(*ast.Ident).Name].C = t.C
1289 }
When handling one of Objective-C's internal types, go get github.com/andlabs/ui fails
with a nil pointer dereference panic at line 1288 above. Upon further investigation:
### sub.Go:&ast.Ident{NamePos:0, Name:"_Ctype_struct_objc_object",
Obj:(*ast.Object)(nil)} sub.Go.(*ast.Ident):&ast.Ident{NamePos:0,
Name:"_Ctype_struct_objc_object", Obj:(*ast.Object)(nil)}
....Name:"_Ctype_struct_objc_object"
typedef:map[string]*main.Type{"_Ctype_struct_objc_cache":(*main.Type)(0x2083eacc0),
"_Ctype_int":(*main.Type)(0x2084d7480),
"_Ctype_struct_objc_method_list":(*main.Type)(0x2084d7e00),
"_Ctype_SEL":(*main.Type)(0x2084d7b00),
"_Ctype_Class":(*main.Type)(0x2084d7040),
"_Ctype_long":(*main.Type)(0x2084d7280),
"_Ctype_struct_objc_ivar":(*main.Type)(0x2084d7700),
"_Ctype_Method":(*main.Type)(0x2083eac00),
"_Ctype_struct_objc_selector":(*main.Type)(0x2084d7a80),
"_Ctype_IMP":(*main.Type)(0x2084d7cc0),
"_Ctype_struct_objc_method":(*main.Type)(0x2084d7d80),
"_Ctype_uint":(*main.Type)(0x2084d7f80),
"_Ctype_Protocol":(*main.Type)(0x2083eb000),
"_Ctype_char":(*main.Type)(0x2084d71c0),
"_Ctype_struct_objc_ivar_list":(*main.Type)(0x2084d7780)}
t:&main.Type{Size:8, Align:-1, C:(*main.TypeRepr)(0x2084f66f0),
Go:(*ast.Ident)(0x2084e53c0), EnumValues:map[string]int64(nil), Typedef:""}
t.C:&main.TypeRepr{Repr:"Protocol", FormatArgs:[]interface {}(nil)}
### expr:(*main.Type)(nil)
so while all the parts of the typedef[...] line are valid, the typedef[...] expression
itself is not. I'm not sure what's going on here.
I'm running Mac OS X 10.8 with go version
go version devel +f39dff1bf0d4 Thu Jun 19 22:18:24 2014 +1000 darwin/amd64
and clang version
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin12.5.0
Thread model: posix
but people at andlabs/ui#9 have different setups.
Thanks!