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10:12:47  <trungl-bot>Tree closed by buildbot@chromium.org: Tree is closed (Automatic: "Mjsunit" on http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/903 "V8 Linux64 GC Stress - custom snapshot" from e21f1228653c3efc19472a445586e1a904fa810c: bmeurer@chromium.org,yangguo@chromium.org)
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10:43:00  <trungl-bot>Tree opened by bmeurer@google.com: Tree is open (reverted)
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10:51:03  <trungl-bot>Tree closed by buildbot@chromium.org: Tree is closed (Automatic: "Mjsunit" on http://build.chromium.org/p/client.v8/builders/V8%20GC%20Stress%20-%201/builds/4008 "V8 GC Stress - 1" from 8f6bca542f11bfcbae1761ab39c27c04b3e57e53: bmeurer@chromium.org,mstarzinger@chromium.org,yangguo@chromium.org)
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11:07:08  <trungl-bot>Tree opened by yangguo@chromium.org: Tree is open
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14:58:33  <ebarrett>can i write to stderr in d8?
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17:45:59  <jugglinmike>arv: Do you have a minute to help me figure out a detail of the RegExp grammar?
17:51:21  <arv>jugglinmike: sure thing
17:52:13  <jugglinmike>great, thanks!
17:52:19  <jugglinmike>so here http://www.ecma-international.org/ecma-262/6.0/#sec-patterns
17:52:40  <jugglinmike>ClassEscape[U] :: DecimalEscape b [+U] -
17:52:46  <jugglinmike>uhg formatting
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17:55:04  <jugglinmike>actually
17:55:04  <jugglinmike>sorry
17:55:06  <jugglinmike>better example
17:55:12  <jugglinmike>is IdentityEscape
17:55:17  <jugglinmike>[+U] SyntaxCharacter
17:55:20  <jugglinmike>[+U] /
17:55:24  <jugglinmike>[~U] SourceCharacter but not UnicodeIDContinue
17:56:04  <jugglinmike>Based on that, I think `/\//` is *invalid*, but `/\//u` is *valid*
17:56:18  <jugglinmike>does that sound right to you?
17:57:39  <arv>hmm... that sounds wrong but I agree with you that that is what the spec seems to say
17:57:43  <jugglinmike>or, actually.. since SourceCharacter includes /, I guess they both should be valid
17:58:52  <arv>Is SourceCharacter any character... Having problems finding the definition
17:59:12  <arv>found it... you any Unicode code point
17:59:53  <jugglinmike>okay then, for that first example I mentioned--ClassEscape
18:00:00  <arv>So ~U means non unicode regexp
18:00:41  <jugglinmike>yeah, that's my understanding
18:00:59  <jugglinmike>/[\-]/ is invalid
18:01:01  <jugglinmike>but
18:01:09  <jugglinmike>/[\-]/u is valid
18:01:33  <jugglinmike>because "[+U] -"
18:01:51  <jugglinmike>does that seem right to you?
18:03:12  <arv>That looks like a bug to me
18:04:12  <arv> /[a\-b]/ should be allowed
18:07:50  <arv>actually, this comes back to IdentityEscape and its usage of SourceCharacter
18:08:32  <arv>so, no bug
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18:54:50  <jugglinmike>I think I get it, arv--thanks
18:54:59  <arv>Thank you
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20:05:14  <bradleymeck>does HasInstance call `instanceof` and therefore will call [Symbol.hasInstance] ?
20:10:52  <bnoordhuis>bradleymeck: i don't think so, i believe it just does a constructor check
20:11:20  <bradleymeck>ok
20:11:27  <bnoordhuis>v8 doesn't implement Symbol.hasInstance at the moment anyway, i think
20:11:58  <bradleymeck>correct
20:12:10  <bradleymeck>but if it deferred to the same impl as instanceof that could change
20:12:44  <bradleymeck>well "that" being the contract of HasInstance
20:13:59  <bnoordhuis>it's possible. but there's Object::GetOwnPropertyNames() as a counterpoint :)
20:16:55  <bradleymeck>unsure the relation
20:17:46  <bnoordhuis>oh, it's that it doesn't do what you think it does
20:18:06  <bnoordhuis>at least, not what you'd expect it to if you know about Object.getOwnPropertyNames()
20:18:11  <bnoordhuis>because the former predates the latter
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