Bug 24702

Summary:	Endless loop in _cairo_stroker_line_to_dashed()
Product:	cairo	Reporter:	Hans Breuer <hans>
Component:	general	Assignee:	Carl Worth <cworth>
Status:	RESOLVED FIXED	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	critical
Priority:	medium
Version:	1.9.5
Hardware:	Other
OS:	All
URL:	https://bugzilla.gnome.org/show_bug.cgi?id=587218
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	24384

Description Hans Breuer 2009-10-23 10:13:14 UTC

Originally reported against Dia (https://bugzilla.gnome.org/show_bug.cgi?id=587218), already discussed to some extend on the cairo mailing list (http://lists.cairographics.org/archives/cairo/2009-June/017513.html ) this is still reproduceable with cairo 1.9.5.

As outlined on the mailing list I think a simple check against "unstable math assumption" could fix this. As written in http://lists.cairographics.org/archives/cairo/2009-June/017506.html the issue is reprduceable independent of compiler (gcc or msvc), os (gentoo linux or windows) and cairo version (1.8.x, 1.93, 1.9.5 at least) and cairo backend. 

It would be really nice if the given fix could be applied because the work-around I've came up with is very obscure to me. See: http://bugzilla-attachments.gnome.org/attachment.cgi?id=137509

Comment 1 M Joonas Pihlaja 2009-11-29 07:04:44 UTC

This and other similar infinite loops have been fixed by Andrea Canciani in commit 26e9f149063b9e1fdb54fc54fccbefdf04a68190 of git master.  Please reopen this bug if the fix doesn't work for you.

Cheers,

Joonas

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