clang diagnostics location_extent zeros when source has a certain type of error

[joelhock]

ycmd commit is a12a0a3 on mac, but also happens with older 2e62515

This might be a libclang bug, but with a source file with errors such as this, the location_extent values for all diagnostics are zeros.

class A {
    A() // my 'missing semicolon' location_extent is wrong
};

i_ruin_everything // i'm the stinker line that causes all the location_extent problems

A::A() {
}

another_error // my location_extent is wrong, too

diagnostics look like:

[
    {
        "kind": "ERROR",
        "text": "expected ';' at end of declaration list",
        "ranges": [],
        "location": {
            "filepath": "source.cc",
            "column_num": 8,
            "line_num": 2
        },
        "location_extent": {
            "start": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            },
            "end": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            }
        },
        "fixit_available": true
    },
    {
        "kind": "ERROR",
        "text": "unknown type name 'i_ruin_everything'",
        "ranges": [],
        "location": {
            "filepath": "source.cc",
            "column_num": 1,
            "line_num": 5
        },
        "location_extent": {
            "start": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            },
            "end": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            }
        },
        "fixit_available": false
    },
    {
        "kind": "ERROR",
        "text": "constructor cannot have a return type",
        "ranges": [
            {
                "start": {
                    "filepath": "",
                    "column_num": 0,
                    "line_num": 0
                },
                "end": {
                    "filepath": "",
                    "column_num": 0,
                    "line_num": 0
                }
            },
            {
                "start": {
                    "filepath": "source.cc",
                    "column_num": 4,
                    "line_num": 7
                },
                "end": {
                    "filepath": "source.cc",
                    "column_num": 5,
                    "line_num": 7
                }
            }
        ],
        "location": {
            "filepath": "source.cc",
            "column_num": 4,
            "line_num": 7
        },
        "location_extent": {
            "start": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            },
            "end": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            }
        },
        "fixit_available": false
    },
    {
        "kind": "ERROR",
        "text": "unknown type name 'another_error'",
        "ranges": [],
        "location": {
            "filepath": "source.cc",
            "column_num": 1,
            "line_num": 10
        },
        "location_extent": {
            "start": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            },
            "end": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            }
        },
        "fixit_available": false
    },
    {
        "kind": "ERROR",
        "text": "expected unqualified-id",
        "ranges": [],
        "location": {
            "filepath": "source.cc",
            "column_num": 50,
            "line_num": 10
        },
        "location_extent": {
            "start": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            },
            "end": {
                "filepath": "",
                "column_num": 0,
                "line_num": 0
            }
        },
        "fixit_available": false
    }
]

[micbou]

Thanks for the example. Should be fixed by PR #860.