this report has been filed here:

https://bugs.edge.launchpad.net/ubuntu/+source/poppler/+bug/258500

the crash was caused by this command:

pdftotext -q -nopgbrk -enc UTF-8 /usr/share/doc/texlive-latex-extra-doc/latex/interactiveworkbook/samplefiles/check.pdf -

Trace as follow:

".
Thread 1 (process 31041):
#0  Form::findWidgetByRef (this=0x0, aref={num = 64, gen = 0}) at Form.cc:1231
	i = 0
#1  0x00007f161f32bd37 in AnnotWidget::initialize (this=0x1013570, xrefA=<value optimized out>, 
    catalog=0x100c6e0, dict=0x10105f0) at Annot.cc:1734
	obj1 = {type = objNone, {booln = 0, intg = 0, real = 0, string = 0x0, name = 0x0, array = 0x0, 
    dict = 0x0, stream = 0x0, ref = {num = 0, gen = 0}, cmd = 0x0}}
#2  0x00007f161f32bff0 in AnnotWidget (this=0x1013570, xrefA=0x100c640, dict=0x10105f0, catalog=0x100c6e0, 
    obj=<value optimized out>) at Annot.cc:1713
No locals.
#3  0x00007f161f32e162 in Annots::createAnnot (this=<value optimized out>, xref=0x100c640, dict=0x10105f0, 
    catalog=0x100c6e0, obj=0x7fff27899080) at Annot.cc:3393
	typeName = <value optimized out>
	annot = <value optimized out>
	obj1 = {type = objName, {booln = 16852416, intg = 16852416, real = 8.3261997950253567e-317, 
    string = 0x10125c0, name = 0x10125c0 "Widget", array = 0x10125c0, dict = 0x10125c0, stream = 0x10125c0, 
    ref = {num = 16852416, gen = 0}, cmd = 0x10125c0 "Widget"}}
#4  0x00007f161f32e418 in Annots (this=0x100c7d0, xref=0x100c640, catalog=0x100c6e0, 
    annotsObj=0x7fff27899140) at Annot.cc:3332
No locals.
#5  0x00007f161f390e71 in Page::displaySlice (this=0x100cda0, out=0x1011110, hDPI=72, vDPI=72, 
    rotate=<value optimized out>, useMediaBox=<value optimized out>, crop=<value optimized out>, 
    sliceX=<value optimized out>, sliceY=-1, sliceW=-1, sliceH=-1, printing=0, catalog=0x100c6e0, 
    abortCheckCbk=0, abortCheckCbkData=0x0, annotDisplayDecideCbk=0, annotDisplayDecideCbkData=0x0)
    at Page.cc:421
	gfx = (Gfx *) 0x10122b0
	obj = {type = objArray, {booln = 16846192, intg = 16846192, real = 8.3231247304456408e-317, 
    string = 0x1010d70, name = 0x1010d70 "@Æ", array = 0x1010d70, dict = 0x1010d70, stream = 0x1010d70, 
    ref = {num = 16846192, gen = 0}, cmd = 0x1010d70 "@Æ"}}
	annotList = <value optimized out>
	i = <value optimized out>
#6  0x00007f161f390fed in Page::display (this=0x0, out=0x40, hDPI=760, vDPI=760, rotate=16828128, 
    useMediaBox=16844272, crop=16827968, printing=<value optimized out>, catalog=0x100c6e0, abortCheckCbk=0, 
    abortCheckCbkData=0x0, annotDisplayDecideCbk=0, annotDisplayDecideCbkData=0x0) at Page.cc:344
No locals.
#7  0x00007f161f394742 in PDFDoc::displayPages (this=0x100c240, out=0x1011110, 
    firstPage=<value optimized out>, lastPage=3, hDPI=72, vDPI=72, rotate=0, useMediaBox=1, crop=0, 
    printing=0, abortCheckCbk=0, abortCheckCbkData=0x0, annotDisplayDecideCbk=0, 
    annotDisplayDecideCbkData=0x0) at PDFDoc.cc:388
	page = 2
#8  0x0000000000401ff2 in main (argc=3, argv=<value optimized out>) at pdftotext.cc:248
	doc = (PDFDoc *) 0x100c240
	fileName = <value optimized out>
	textFileName = <value optimized out>
	ownerPW = <value optimized out>
	userPW = <value optimized out>
	textOut = (class TextOutputDev *) 0x1011110
	f = <value optimized out>
	uMap = (UnicodeMap *) 0x100c090
	info = {type = objNone, {booln = 0, intg = 0, real = 0, string = 0x0, name = 0x0, array = 0x0, 
    dict = 0x0, stream = 0x0, ref = {num = 0, gen = 0}, cmd = 0x0}}
	ok = <value optimized out>
	p = <value optimized out>
	exitCode = <value optimized out>"

Thanks,