---Type <return> to continue, or q <return> to quit---
0x00007ffff0a1a9cd in WebCore::AXRenderObject::selectedTextRange (
    this=0x25e027490b50)
    at ../../third_party/WebKit/Source/core/accessibility/AXRenderObject.cpp:1548
1548        ASSERT(isTextControl());
(gdb) bt
#0  0x00007ffff0a1a9cd in WebCore::AXRenderObject::selectedTextRange (
    this=0x25e027490b50)
    at ../../third_party/WebKit/Source/core/accessibility/AXRenderObject.cpp:1548
#1  0x00007fffef40e007 in blink::WebAXObject::selectionStart (
    this=0x7fff9dba9630)
    at ../../third_party/WebKit/Source/web/WebAXObject.cpp:629
#2  0x00000000004c6c4e in content::WebAXObjectProxy::SelectedTextRange (
    this=0x7fff9dba9620)
    at ../../content/shell/renderer/test_runner/web_ax_object_proxy.cc:668
#3  0x00000000004d0c40 in base::internal::RunnableAdapter<std::string (content::WebAXObjectProxy::*)()>::Run (this=0x7fffffff81c0, object=0x7fff9dba9620)
    at ../../base/bind_internal.h:134
#4  0x00000000004cf6ca in base::internal::InvokeHelper<false, std::string, base::internal::RunnableAdapter<std::string (content::WebAXObjectProxy::*)()>, void (content::WebAXObjectProxy* const&)>::MakeItSo(base::internal::RunnableAdapter<std::string (content::WebAXObjectProxy::*)()>, content::WebAXObjectProxy* const&)
    (runnable=..., a1=@0x7fffffff82e8: 0x7fff9dba9620)
    at ../../base/bind_internal.h:863
#5  0x00000000004ce830 in base::internal::Invoker<0, base::internal::BindState<base::internal::RunnableAdapter<std::string (content::WebAXObjectProxy::*)()>, std::string (content::WebAXObjectProxy*), void ()>, std::string (content::WebAXObjectProxy*)>::Run(base::internal::BindS---Type <return> to continue, or q <return> to quit---
t&) (base=0x7fff9b49eda0, x1=@0x7fffffff82e8: 0x7fff9dba9620)
    at ../../base/bind_internal.h:1145
#6  0x00000000004cf94f in base::Callback<std::string (content::WebAXObjectProxy*)>::Run(content::WebAXObjectProxy* const&) const (this=0x7fff9b39f150,
    a1=@0x7fffffff82e8: 0x7fff9dba9620) at ../../base/callback.h:441
#7  0x00000000004ce8b3 in gin::internal::Invoker<std::string, content::WebAXObjectProxy*, void, void, void, void, void>::Go(gin::Arguments*, base::Callback<std::string (content::WebAXObjectProxy*)> const&, content::WebAXObjectProxy* const&) (args=0x7fffffff8300, callback=..., a1=@0x7fffffff82e8: 0x7fff9dba9620)
    at ../../gin/function_template.h:226
#8  0x00000000004cbc66 in gin::internal::Dispatcher<std::string (content::WebAXObjectProxy*)>::DispatchToCallback(v8::FunctionCallbackInfo<v8::Value> const&) (
    info=...) at ../../gin/function_template.h:330
#9  0x00007ffff761553a in v8::internal::FunctionCallbackArguments::Call (
    this=this@entry=0x7fffffff8580,
    f=f@entry=0x4cbaef <gin::internal::Dispatcher<std::string (content::WebAXObjectProxy*)>::DispatchToCallback(v8::FunctionCallbackInfo<v8::Value> const&)>)
    at ../../v8/src/arguments.cc:56
#10 0x00007ffff7645749 in HandleApiCallHelper<false> (isolate=0x7fff9e7af020,
    args=...) at ../../v8/src/builtins.cc:1215
#11 Builtin_Impl_HandleApiCall (isolate=0x7fff9e7af020, args=...)
    at ../../v8/src/builtins.cc:1232
#12 v8::internal::Builtin_HandleApiCall (args_length=2,
---Type <return> to continue, or q <return> to quit---
    args_object=0x7fffffff8650, isolate=0x7fff9e7af020)
    at ../../v8/src/builtins.cc:1231
#13 0x00000f9dc5006aae in ?? ()