(gdb) 
#0  0x00007f4ecfccd259 in WebCore::AXObjectCache::handleAttributeChanged(WebCore::QualifiedName const&, WebCore::Element*) (this=<optimized out>) at ../Source/WTF/wtf/RefPtr.h:70
#1  0x00007f4ecfccd259 in WebCore::AXObjectCache::handleAttributeChanged(WebCore::QualifiedName const&, WebCore::Element*) (caseSensitive=true, prefix=@0x7f4ed0fd8f6f: <error reading variable>, this=<optimized out>) at ../Source/WTF/wtf/text/WTFString.h:281
#2  0x00007f4ecfccd259 in WebCore::AXObjectCache::handleAttributeChanged(WebCore::QualifiedName const&, WebCore::Element*) (this=0x7f4e39f2e800, attrName=..., element=0x28e01a0)
    at ../Source/WebCore/accessibility/AXObjectCache.cpp:880
#3  0x00007f4ecfec37ca in WebCore::Element::attributeChanged(WebCore::QualifiedName const&, WTF::AtomicString const&, WTF::AtomicString const&, WebCore::Element::AttributeModificationReason) (this=0x28e01a0, name=..., oldValue=..., newValue=...) at ../Source/WebCore/dom/Element.cpp:1137
#4  0x00007f4ecfec2ca0 in WebCore::Element::didModifyAttribute(WebCore::QualifiedName const&, WTF::AtomicString const&, WTF::AtomicString const&) (this=this@entry=0x28e01a0, name=..., oldValue=..., newValue=...) at ../Source/WebCore/dom/Element.cpp:2851
#5  0x00007f4ecfec9eed in WebCore::Element::setAttributeInternal(unsigned int, WebCore::QualifiedName const&, WTF::AtomicString const&, WebCore::Element::SynchronizationOfLazyAttribute) (this=this@entry=0x28e01a0, index=<optimized out>, name=..., newValue=..., inSynchronizationOfLazyAttribute=inSynchronizationOfLazyAttribute@entry=WebCore::Element::NotInSynchronizationOfLazyAttribute) at ../Source/WebCore/dom/Element.cpp:1075
#6  0x00007f4ecfec70bf in WebCore::Element::setAttribute(WTF::AtomicString const&, WTF::AtomicString const&, int&) (this=this@entry=0x28e01a0, localName=..., value=..., ec=@0x7ffc1f77d82c: 0) at ../Source/WebCore/dom/Element.cpp:1027
#7  0x00007f4ed0b1a1cc in webkit_dom_element_set_attribute(WebKitDOMElement*, gchar const*, gchar const*, GError**) (self=<optimized out>, name=0x6ae59c "src", value=0x29025f0 "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEsAAAAbCAYAAAA0wHIdAAAAAXNSR0IArs4c6QAAAAlwSFlzAAAOxAAADsQBlSsOGwAAABl0RVh0U29mdHdhcmUATWljcm9zb2Z0IE9mZmljZX/tNXEAAAwMSURBVGhDxVl7bFRVHv7dO9N2pu8CCxQEIb"..., error=0x7ffc1f77d970) at DerivedSources/webkitdom/WebKitDOMElement.cpp:533
#8  0x00000000004d72ed in  ()
#9  0x00000000004dea55 in  ()
#10 0x00000000004dfc06 in  ()
#11 0x00000000004e154a in  ()
#12 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x1e7a190 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#13 0x00000000004cf4fe in  ()
#14 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x1db8200 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#15 0x0000000000540fba in  ()
#16 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x23b04a0 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#17 0x00000000005403f7 in  ()
#18 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x1e6a830 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#19 0x00000000005fb265 in  ()
#20 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x1e85030 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#21 0x0000000000609e25 in  ()
#22 0x00007f4ed1924447 in g_simple_async_result_complete (simple=0x1e2f350 [GSimpleAsyncResult]) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gsimpleasyncresult.c:801
#23 0x0000000000631305 in  ()
#24 0x0000000000659373 in  ()
#25 0x00007f4ecdc6ffda in g_main_context_dispatch (context=0x16e9400) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./glib/gmain.c:3154
#26 0x00007f4ecdc6ffda in g_main_context_dispatch (context=context@entry=0x16e9400) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./glib/gmain.c:3769
#27 0x00007f4ecdc70380 in g_main_context_iterate (context=context@entry=0x16e9400, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./glib/gmain.c:3840
#28 0x00007f4ecdc7042c in g_main_context_iteration (context=context@entry=0x16e9400, may_block=may_block@entry=1) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./glib/gmain.c:3901
#29 0x00007f4ed195bccd in g_application_run (application=0x16d7140 [GearyApplication], argc=1, argv=0x7ffc1f77e0b8) at /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gio/gapplication.c:2381
#30 0x0000000000483b6f in _vala_main ()
#31 0x00007f4eccf80830 in __libc_start_main (main=
    0x4665e0 <main>, argc=1, argv=0x7ffc1f77e0b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc1f77e0a8) at ../csu/libc-start.c:291
#32 0x0000000000466619 in _start ()
(gdb) 

