144856 2015-05-10 21:20:14 -0700 Creating a new blank document in icloud pages causes an AI error: Abstract value (CellBytecodedoubleBoolOther, TOP, TOP) for double node has type outside SpecFullDouble. 2015-05-13 16:59:34 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) All All RESOLVED FIXED P2 Normal --- 144877 1 fpizlo fpizlo barraclough basile_clement benjamin ggaren mark.lam mhahnenb mmirman msaboff nrotem oliver saam sam oldest_to_newest 1093652 0 fpizlo 2015-05-10 21:20:14 -0700 Patch forthcoming. 1094597 1 fpizlo 2015-05-13 14:55:12 -0700 It appears that we're converting a GetByVal on a double array to a GetMyArgumentByVal. I'm going to try to construct a reduced test case. We probably have two options: 1) Disable sinking on ClonedArguments. Maybe just disable it if there was some kind of type inference that we can't handle. 2) Make sure that when we convert GetByVal to GetMyArgumentByVal, we respect whatever representation rules there are. 1094627 2 fpizlo 2015-05-13 16:00:47 -0700 And it looks like the culprit is Node::convertToIdentityOn(). It tries to insert conversion nodes, but it fails to apply the right type checks. 1094638 3 fpizlo 2015-05-13 16:30:04 -0700 Reduced case: function foo() { "use strict"; return arguments[0] + 1.5; } noInline(foo); for (var i = 0; i < 10000; ++i) { var result = foo(4.2); if (result != 5.7) throw "Error: bad result: " + result; } 1094645 4 253073 fpizlo 2015-05-13 16:37:01 -0700 Created attachment 253073 the pagch 1094654 5 fpizlo 2015-05-13 16:59:34 -0700 Landed in http://trac.webkit.org/changeset/184318 253073 2015-05-13 16:37:01 -0700 2015-05-13 16:53:46 -0700 the pagch blah.patch text/plain 9708 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTg0MzE3KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDMxIEBA CisyMDE1LTA1LTEzICBGaWxpcCBQaXpsbyAgPGZwaXpsb0BhcHBsZS5jb20+CisKKyAgICAgICAg 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