Mapserver hangs if the text is empty

[krzbor]

Mapserver (7.0.0) hangs if the text is empty:
LAYER
#NAME je_100_n
GROUP granice
METADATA
"wms_title" "Powiaty - nazwy" ##required‚‚
END
PROJECTION
"init=epsg:2180" ##required
END

DATA         je100O
STATUS       off
TYPE         polygon
LABELITEM    "NAZWA" #  <--------- hangs if the text is empty
CLASS
    LABEL
        ENCODING WINDOWS-1250
        FORCE TRUE
        COLOR 200 0 0
        TYPE TRUETYPE
        FONT arial
        SIZE 9
        ANTIALIAS FALSE
        POSITION cc
        PARTIALS FALSE
        STYLE
            GEOMTRANSFORM 'labelpoly'
            COLOR 255 255 255
        END
    END # end of label
END

END

[tbonfort]

unable to reproduce with a simple testcase. please provide a full testcase (data + full mapfile + request)

[krzbor]

It is difficult for me to extract a small piece of data and file maps. The server hangs when I try to view the area where the attribute value is empty. I changed a blank text on the minus sign (inside DBF file) and everything was OK.

[mkofahl]

@krzbor Are you able to compile branch-7-0 with patch 5570f5d yourself? I noticed the same behaviour (infinitve loop until http server timeout) when labelitem met database null-values. A simplified test-case worked however. I found a small typo in msAddLabelGroup which solved the problem for mee.

[krzbor]

5570f5d patch solved my problem. Thank you mkofahl

[ejn]

Merged #5169 fixes this according to OP. Closing.