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This patch works around a segmentation fault in 'Magick++/tests/color' when
running 'Magick++/tests/tests.tap'. Here we get an exception early on, which
is supposedly harmless:
Caught exception: color: UnableToOpenConfigureFile `colors.xml' @ warning/configure.c/GetConfigureOptions/706
However, when the stack unwinders run, 'UnregisterDOTImage' gets called even
though 'RegisterDOTImage' hadn't been called yet; thus, 'graphic_context' in
coders/dot.c is NULL, leading to the segfault.
--- ImageMagick-6.9.2-1/coders/dot.c 2015-09-16 17:32:42.900323334 +0200
+++ ImageMagick-6.9.2-1/coders/dot.c 2015-09-16 17:32:48.312367636 +0200
@@ -240,6 +240,7 @@ ModuleExport void UnregisterDOTImage(voi
(void) UnregisterMagickInfo("GV");
(void) UnregisterMagickInfo("DOT");
#if defined(MAGICKCORE_GVC_DELEGATE)
+ if (graphic_context != NULL)
gvFreeContext(graphic_context);
#endif
}
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