I have a download link (40mb+ file) when clicked and confirm where to save file, make another click on same link and got crash. 

Tried to make sample of crash, and didn't yet face such behavior: on second click app didn't made something (not showed download dialog), but also not crashed. Will provide sample as soon as got reproducible one.

Debug:
<img width="1331" alt="screen shot 2017-02-16 at 1 24 09 pm" src="https://cloud.githubusercontent.com/assets/1834053/23017440/56041e32-f44b-11e6-8d5c-f1ff6ad671cd.png">

Report:
<img width="1398" alt="screen shot 2017-02-16 at 1 25 28 pm" src="https://cloud.githubusercontent.com/assets/1834053/23017568/db45549e-f44b-11e6-8f74-650b0f2cc756.png">

Any idea what can affect such problem? 

As I see from report last triggered method was webContents.loadURL, but didn't understand why it was called since I have webContetst.session event 'will-download' called, that had to be triggered after webContents.downloadURL, not loadURL.

atom/browser/api/atom_api_web_contents.cc
v8::Isolate* isolate, content::WebContents* web_contents, Type type) {
  
  return mate::CreateHandle(isolate, new WebContents(isolate, web_contents,
        type));
}
mate::Handle<WebContents> WebContents::Create(
    v8::Isolate* isolate, const mate::Dictionary& options) {
  return mate::CreateHandle(isolate, new WebContents(isolate, options));
}
}  
}  
namespace {
using atom::api::WebContents;
void Initialize(v8::Local<v8::Object> exports, v8::Local<v8::Value> unused,
                v8::Local<v8::Context> context, void* priv) {
  v8::Isolate* isolate = context->GetIsolate();
  mate::Dictionary dict(isolate, exports);
  dict.Set("WebContents", WebContents::GetConstructor(isolate)->GetFunction());
  dict.SetMethod("create", &WebContents::Create);
  dict.SetMethod("fromId", &mate::TrackableObject<WebContents>::FromWeakMapID);
  dict.SetMethod("getAllWebContents",
                 &mate::TrackableObject<WebContents>::GetAll);
}
}  
NODE_MODULE_CONTEXT_AWARE_BUILTIN(atom_browser_web_contents, Initialize)