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 26 2019-05-31T01:25:05  <instagibbs> gwillen, turns out it's used exactly twice, in FindAndDelete :grimace:
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 30 2019-05-31T01:38:05  <gwillen> ooooof
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 39 2019-05-31T02:04:22  <bitcoin-git> [bitcoin] ajtowns opened pull request #16127: Add support for thread safety annotations when using std::mutex (master...201905-locking) https://github.com/bitcoin/bitcoin/pull/16127
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 46 2019-05-31T02:14:15  <phantomcircuit> instagibbs, things calling FindAndDelete right?
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 48 2019-05-31T02:19:00  <phantomcircuit> instagibbs, explicit CScript(const std::vector<unsigned char>& b) { operator<<(b); }
 49 2019-05-31T02:19:07  <phantomcircuit> and operator<< pushes them as bytes
 50 2019-05-31T02:20:07  <phantomcircuit> it's pushing a byte array into the script, not copying a script directly
 51 2019-05-31T02:20:27  <phantomcircuit> and yeah it's confusing and a potential cause of bugs if you're not careful about it
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197 2019-05-31T13:36:18  <instagibbs> phantomcircuit_, oh huh I am blind, there it is
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210 2019-05-31T14:07:36  <bitcoin-git> [bitcoin] instagibbs opened pull request #16128: Delete error-prone CScript constructor only used with FindAndDelete (master...cscript_construct) https://github.com/bitcoin/bitcoin/pull/16128
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235 2019-05-31T15:04:20  <bitcoin-git> [bitcoin] practicalswift opened pull request #16129: Make reasoning about dependencies easier by not including unused dependencies (master...decouple-translation-units) https://github.com/bitcoin/bitcoin/pull/16129
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282 2019-05-31T18:19:28  <bitcoin-git> [bitcoin] stevenroose opened pull request #16130: Don't GPG sign intermediate commits with github-merge tool (master...contrib-no-sign) https://github.com/bitcoin/bitcoin/pull/16130
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284 2019-05-31T18:21:27  <stevenroose> Anyone else here has a Yubikey and .gitconfig configured to always sign commits?
285 2019-05-31T18:22:05  <stevenroose> I use the python script a lot for Elements, I recognize that for bitcoin the subset of contributors that actually use the script is small.
286 2019-05-31T18:22:07  <dongcarl> stevenroose: Yup, sup
287 2019-05-31T18:23:01  <dongcarl> BTW, build system lessons with Cory happening in #bitcoin-builds right now if people wanna join
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289 2019-05-31T18:31:35  <ldz27> hi, I wanted to ask for the creation of the secp256k1_vc142 nuget-package. I see Pieter Wuille is the author of the older versions and I hope I am right here.
290 2019-05-31T18:33:44  <sipa> i know nothing about nuget
291 2019-05-31T18:35:38  <gwillen> ldz27: it looks like Erik Voskuil was making the -vc packages, according to https://www.nuget.org/packages?q=secp256k1
292 2019-05-31T18:35:47  <gwillen> but it looks like he stopped in 2017
293 2019-05-31T18:36:18  <gwillen> but I also know nothing about nuget so I'm not really sure how it works
294 2019-05-31T18:36:39  <gwillen> it looks like there are a number of different people packaging libsecp256k1 for it under different names
295 2019-05-31T18:36:57  <ldz27> sipa: ok, sorry for the confusion. gwillen: thank you for the information :)
296 2019-05-31T18:37:11  <gwillen> no problem!
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298 2019-05-31T18:44:16  <jeremyrubin> Does anyone have any good documentation on how script parsing works around OP_IF and PUSHDATA
299 2019-05-31T18:45:37  <jeremyrubin> I'm generally confused about how we handle the script: OP_IF PUSHDATA32 <OP_ELSE <30 bytes> OP_ENDIF> OP_ENDIF
300 2019-05-31T18:46:29  <jeremyrubin> or I guess more confusingly
301 2019-05-31T18:47:14  <jeremyrubin> OP_IF PUSHDATA32 <OP_ELSE <31 bytes>> OP_ENDIF
302 2019-05-31T18:48:01  <jeremyrubin> Is it that we scan until the next OP_ELSE/END if OP_IF is false, but we parse pushdata along the way?
303 2019-05-31T18:49:49  <luke-jr> OP_IF just restricts execution, not parsing
304 2019-05-31T18:50:01  <luke-jr> indeed, an invalid opcode inside the OP_IF still causes the script to fail (IIRC)
305 2019-05-31T18:50:24  <jeremyrubin> gotcha
306 2019-05-31T18:51:57  <jeremyrubin> I guess my issue is that I'd like to introduce a new pushdata type opcode (for OP_COSHV related stuff). And the best way to do that seems to be to modify GetOp, but GetOp doesn't take flags, so I was wondering if it's generally safe to do inside of execution.
307 2019-05-31T18:52:04  <jeremyrubin> But then this issue came up
308 2019-05-31T18:52:13  <jeremyrubin> So I probably do need to end up adding flags to GetOp?
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335 2019-05-31T20:43:58  <roconnor> I know this is core-dev, but FWIW, there are other ways of dividing up the parsing and execution of opcodes in Script.  For my Haskell work I match up IFs ELSEIFs and ENDIFs at parsing time, and handle invalid opcodes inside OP_IF as parsing errors.  This has the operational effect that in my implementation mismatched ENDIFs fail at parse time rather than execution time.  However this doesn't cause any semantic difference
336 2019-05-31T20:43:59  <roconnor> between how Bitcoin Core interprets Script.
337 2019-05-31T20:45:13  <roconnor> Script opcodes are self-delimiting, that is why OP_IF PUSHDATA32 <OP_ELSE <31 bytes>> OP_ENDIF doesn't cause problems.  PUSHDATA32 <OP_ELSE <31 bytes>> is a single (parameterized) opcode.
338 2019-05-31T20:46:27  <roconnor> perhaps better written as PUSHDATA32[<OP_ELSE <31 bytes>>] or PUSHDATA32(<OP_ELSE <31 bytes>>).
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340 2019-05-31T20:59:04  <phantomcircuit> roconnor, invalid opcodes only trigger an error if they're actually hit
341 2019-05-31T20:59:06  <phantomcircuit> so it's a protocol violation to throw an exception on an invalid opcode in an OP_IF
342 2019-05-31T20:59:08  <phantomcircuit> (i think
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344 2019-05-31T21:00:27  <roconnor> I'm refering specifically to OP_VER and friends.
345 2019-05-31T21:00:36  <roconnor> Sorry for not being clearer before.
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347 2019-05-31T21:00:53  <roconnor> er, I mean OP_VERIF
348 2019-05-31T21:01:32  <roconnor> Hmm, I thought there was more than just OP_VERIF and OP_VERNOTIF, but I guess that was it.
349 2019-05-31T21:01:37  <jb55> phantomcircuit: correct https://jb55.com/s/e45a49f6af664e7a.txt
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352 2019-05-31T21:02:52  <roconnor> you are correct that other opcode must be parsed.
353 2019-05-31T21:04:12  <jb55> so what's this idea with pushing script as pushdata? am I missing some context here
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355 2019-05-31T21:07:13  <roconnor> I think there was a question if if OP_IF were to naively scan over the bytearray representing script, it would stop when it finds the code for OP_ENDIF or OP_ELSE even within the parameter to an OP_PUSHDATA opcode.
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362 2019-05-31T21:22:01  <jb55> it wouldn't interpret it as endif it would interpret it as the length argument to pushdata if I'm understanding the question correctly
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364 2019-05-31T21:23:56  <jb55> s/endif/else
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366 2019-05-31T21:26:11  <jb55> oh he said pushdata32, nm
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368 2019-05-31T21:29:07  <jb55> so this scenario https://jb55.com/s/9bcffd1e24209b53.txt, so basically what roconnor said
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378 2019-05-31T22:22:28  <warren> Regarding the mailing list, LF had higher priorities to deal with on infra for this time and they aren't going to shut down the existing list anytime soon because of other kernel subprojects. Their DoS mitigations seem to be holding it steady for now. Reapproaching this probably in June when folks are not traveling anymore.
379 2019-05-31T22:23:30  <warren> It sucks that their mailman server was crippled by attacks on bitcoin-dev in particular. They remain blackholed to several major mail providers like Yahoo. I think bounces are also entirely disabled now as one of the DoS mitigation measures.
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389 2019-05-31T22:33:08  <jb55> :(
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