[cairo-bugs] [Bug 85372] New: 1.14 crash on cairo_stroke, antialias, fractional line width

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85372

            Bug ID: 85372
           Summary: 1.14 crash on cairo_stroke, antialias, fractional line
                    width
           Product: cairo
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Mac OS X (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: image backend
          Assignee: chris at chris-wilson.co.uk
          Reporter: mflatt at cs.utah.edu
        QA Contact: cairo-bugs at cairographics.org

Created attachment 108306
  --> https://bugs.freedesktop.org/attachment.cgi?id=108306&action=edit
example program that crashes

I get a concistsnt segfault with the enclosed program on 1.14, and not on
1.12.16.

I used OS X, but the crash's stack trace is consistent with one reported by
a Racket user on 64-bit Linux (Debian unstable).

Using a different back end, making the image size smaller, removing the call
to enable antialiasing, removing the line-width adjustment, or dropping one
of the line-tos makes the crash go away for 1.14.

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