Re: [BUGS] BUG #14584: Segmentation fault importing large XML file

Hi Pavel,

By large I mean big in size: 935M
Posts.xml: XML 1.0 document, UTF-8 Unicode text, with very long lines

I installed debug symbols for libxml2 if this helps:

#0  xmlParserPrintFileContextInternal (input=input@entry=0x55afc89ef4b0, channel=0x55afc636ca30 <appendStringInfo>, data=0x55afc89e5cc0) at ../../error.c:181
        cur = <optimized out>
        base = <optimized out>
        n = <optimized out>
        col = <optimized out>
        content = "\000\004\000\000\000\000\000\000\260\364\236ȯU\000\000\000\000\000\000\000\000\000\000\330\340\236ȯU\000\000`\203D*\375\177\000\000M@XƯU\000\000\300\\\236ȯU\000\000\260\364\236ȯU\000\000\"\000\000\000\000\000\000\000\332\370\023\340\241\177\000\000\240"
        ctnt = <optimized out>
#1  0x00007fa1e00a587a in xmlParserPrintFileContext__internal_alias (input=input@entry=0x55afc89ef4b0) at ../../error.c:231
No locales.
#2  0x000055afc6542a1c in xml_errorHandler (data=0x55afc89e59b0, error=<optimized out>) at /build/postgresql-9.6-ZHxyhz/postgresql-9.6-9.6.2/build/../src/backend/utils/adt/xml.c:1661
        errFuncSaved = 0x7fa1e00a41b0 <xmlGenericErrorDefaultFunc>
        errCtxSaved = 0x0
        xmlerrcxt = 0x55afc89e59b0
        ctxt = <optimized out>
        input = 0x55afc89ef4b0
        node = <optimized out>
        name = <optimized out>
        domain = <optimized out>
        level = <optimized out>
        errorBuf = 0x55afc89e5cc0
        __func__ = "xml_errorHandler"
#3  0x00007fa1e00a5fa4 in __xmlRaiseError (schannel=0x55afc6542920 <xml_errorHandler>, schannel@entry=0x0, channel=channel@entry=0x0, data=0x55afc89e59b0, data@entry=0x0, ctx=ctx@entry=0x55afc89ede80,
    nod=nod@entry=0x0, domain=domain@entry=1, code=1, level=XML_ERR_FATAL, file=0x0, line=838090, str1=0x7fa1e01cc24d "Huge input lookup", str2=0x0, str3=0x0, int1=0, col=4,
    msg=0x7ffd2a4485e0 "internal error: %s\n") at ../../error.c:604
        ctxt = <optimized out>
        node = 0x0
        str = 0x55b08f70e270 "internal error: Huge input lookup\n"
        input = <optimized out>
        to = 0x55afc89ee0d8
        baseptr = 0x0
#4  0x00007fa1e00aa900 in xmlFatalErr (ctxt=ctxt@entry=0x55afc89ede80, error=error@entry=XML_ERR_INTERNAL_ERROR, info=info@entry=0x7fa1e01cc24d "Huge input lookup") at ../../parser.c:546
        errmsg = <optimized out>
        errstr = "internal error: %s\n", '\000' <repetidos 109 veces>
#5  0x00007fa1e00acf14 in xmlGROW (ctxt=0x55afc89ede80) at ../../parser.c:2084
        curEnd = <optimized out>
        curBase = <optimized out>
#6  0x00007fa1e00c1338 in xmlParseContent__internal_alias (ctxt=0x55afc89ede80) at ../../parser.c:10101
        test = <optimized out>
        cons = 0
        cur = <optimized out>
#7  0x00007fa1e00c1c13 in xmlParseElement__internal_alias (ctxt=ctxt@entry=0x55afc89ede80) at ../../parser.c:10255
        name = 0x55afc89ef577 "posts"
        prefix = 0x0
        URI = 0x0
        node_info = {node = 0x0, begin_pos = 140333225866765, begin_line = 94213473493376, end_pos = 140333225866817, end_line = 94213473493376}
        line = 2
        tlen = 5
        ret = 0x55afc89efab0
        nsNr = 0
#8  0x00007fa1e00c266a in xmlParseDocument__internal_alias (ctxt=ctxt@entry=0x55afc89ede80) at ../../parser.c:10952
        start = "<?xm"
        enc = <optimized out>
#9  0x00007fa1e00c9fd9 in xmlDoRead (reuse=1, options=0, encoding=0x0, URL=0x0, ctxt=0x55afc89ede80) at ../../parser.c:15430
        ret = <optimized out>
#10 xmlCtxtReadMemory__internal_alias (ctxt=0x55afc89ede80,
    buffer=buffer@entry=0x7fa09306f040 "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<posts>\n  <row Id=\"1\" PostTypeId=\"1\" AcceptedAnswerId=\"727273\" CreationDate=\"2009-07-15T06:27:46.723\" Score=\"155\" ViewCount=\"92736\" Body=\"&lt;p&gt;A Vista virtua"..., size=size@entry=979473840, URL=URL@entry=0x0, encoding=encoding@entry=0x0, options=options@entry=0) at ../../parser.c:15719
        input = 0x55afc89ef410