constant handling is broken in cgo at tip

[niemeyer]

What steps will reproduce the problem?
1. go get launchpad.net/goyaml

What is the expected output? What do you see instead?

Output on 1.0.2:

Nothing. Just works.

Output on tip:

% go install
# launchpad.net/goyaml
inconsistent definitions for C.YAML_DOCUMENT_END_EVENT
inconsistent definitions for C.YAML_STREAM_END_EVENT

Output on tip with extra debug info:

# launchpad.net/goyaml
inconsistent definitions for C.YAML_STREAM_END_EVENT:
&main.Name{Go:"YAML_STREAM_END_EVENT",
Mangle:"_Cconst_YAML_STREAM_END_EVENT", C:"YAML_STREAM_END_EVENT",
Define:"", Kind:"const", Type:(*main.Type)(0xf8400ebb80),
FuncType:(*main.FuncType)(nil), AddError:false, Const:"0x2"} vs.
&main.Name{Go:"YAML_STREAM_END_EVENT",
Mangle:"_Cconst_YAML_STREAM_END_EVENT", C:"YAML_STREAM_END_EVENT",
Define:"", Kind:"const", Type:(*main.Type)(0xf8401acb40),
FuncType:(*main.FuncType)(nil), AddError:false, Const:"0x2"}
inconsistent definitions for C.YAML_DOCUMENT_END_EVENT:
&main.Name{Go:"YAML_DOCUMENT_END_EVENT",
Mangle:"_Cconst_YAML_DOCUMENT_END_EVENT",
C:"YAML_DOCUMENT_END_EVENT", Define:"", Kind:"const",
Type:(*main.Type)(0xf8400eb300), FuncType:(*main.FuncType)(nil), AddError:false,
Const:"0x4"} vs. &main.Name{Go:"YAML_DOCUMENT_END_EVENT",
Mangle:"_Cconst_YAML_DOCUMENT_END_EVENT",
C:"YAML_DOCUMENT_END_EVENT", Define:"", Kind:"const",
Type:(*main.Type)(0xf8401b5d40), FuncType:(*main.FuncType)(nil), AddError:false,
Const:"0x4"}

[niemeyer]

Comment 1:

Status changed to Duplicate.

Merged into issue #4054.