[cairo] segmentation fault during poppler_page_render()

[Dan Raymond]

I've created a minimal test case that reliably reproduces the crash.  It 
crashes on both Windows and OS X.  However, on Windows it crashes at 
window size (1202, 931) while on OS X it crashes at window size 
(1207,932).  It also seems to be data related because the test PDF has 
two pages and it only crashes when rendering page 2.

Here is the gdb output:

Program received signal SIGSEGV, Segmentation fault.
0x68fe680d in _fill_xrgb32_lerp_opaque_spans ()
    from C:\msys2\usr\local\bin\libcairo-2.dll

Here is the test PDF:

https://drive.google.com/folderview?id=0B1c6mbL2-9gsUHZDcWloTEMxZzQ&usp=sharing

Here is the test code:

#include <poppler.h>
#include <stdio.h>    // printf()

int main(int argc, char **argv)
{
    PopplerDocument *doc;
    PopplerPage *page;
    cairo_surface_t *surface;
    cairo_t *cr;
    double x_points, y_points;           // measured in points which are 
1/72 inch
    double pdf_width, pdf_height;        // measured in pixels
    double window_width, window_height;  // measured in pixels
    int    fit_width;
    double scale_factor;
    double x_padding;
    double y_padding;

#ifdef __APPLE__
    doc = 
poppler_document_new_from_file("file:///Users/draymond/crash/test.pdf", 
NULL, NULL);
#else
    doc = poppler_document_new_from_file("file:///C:/crash/test.pdf", 
NULL, NULL);
#endif
    page = poppler_document_get_page(doc, 1);  // does not crash 
rendering page 0

    for (window_width = 1200; window_width <= 1210; window_width++)
    {
       for (window_height = 930; window_height <= 940; window_height++)
       {
          printf("(%f, %f)\n", window_width, window_height);

          poppler_page_get_size(page, &x_points, &y_points); // 792, 612
          fit_width = (window_width / window_height) < (x_points / 
y_points);
          scale_factor = fit_width ? (window_width / x_points) : 
(window_height / y_points);
          pdf_width = x_points * scale_factor;
          pdf_height = y_points * scale_factor;
          x_padding = fit_width ? 0 : ((window_width - pdf_width) / 2);
          y_padding = fit_width ? ((window_height - pdf_height) / 2) : 0;

          surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 
window_width, window_height);
          cr = cairo_create(surface);

          cairo_translate(cr, x_padding, y_padding);
          cairo_scale(cr, scale_factor, scale_factor);
          poppler_page_render(page, cr);

          cairo_destroy(cr);
          cairo_surface_destroy(surface);
       }
    }

    printf("success\n");
    g_object_unref(page);
    g_object_unref(doc);
}