226586 2021-06-03 08:15:56 -0700 Request.constructor misses checking for the type of init.signal param 2021-06-10 08:16:18 -0700 1 1 1 Unclassified WebKit WebCore Misc. WebKit Local Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 zyscoder webkit-unassigned achristensen bugs-noreply mcatanzaro sam webkit-bug-importer youennf oldest_to_newest 1766394 0 zyscoder 2021-06-03 08:15:56 -0700 Steps to reproduce: (1) Open a tab and navigate to any URL; (2) Run the following code in the Console of Devtools: ``` new Request('', {signal:{}}) ``` (3) Then this code would be evaluated successfully without throwing any exception. Only a warning is asserted. Actual results: This code would be evaluated successfully without throwing any exception. Only a warning is asserted. Expected results: As https://fetch.spec.whatwg.org/#requestinfo says, the init.signal param is of AbortSignal type. Since the code above sets the input param as {}, a TypeError exception should be thrown. (Just behave as what the warning says.) BTW, in my test both Chrome and Firefox throw exceptions when evaluating this code. 1767352 1 youennf 2021-06-07 01:35:35 -0700 See https://bugs.webkit.org/show_bug.cgi?id=199576 for some background info on why it is difficult to make it throw. @zyscoder, what is the impact of not throwing here for you? 1768554 2 webkit-bug-importer 2021-06-10 08:16:18 -0700 <rdar://problem/79140275>