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 16 2016-02-18T00:57:39  <phantomcircuit> morcos, im a bit confused by your feefilter patch, it seems to be vastly more complex than necessary
 17 2016-02-18T01:02:13  <phantomcircuit> why not simply call CTxMemPool::GetMinFee ?
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 19 2016-02-18T01:06:13  <gmaxwell> phantomcircuit: read the mailing list post. He's trying to prevent connection correlation. But I'm not sure that it's effective in any case-- consider, one can actively prove for the minfee by sending transactions and seeing if they end up mempooled.
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 21 2016-02-18T01:10:02  <phantomcircuit> gmaxwell, yeah i dont see the point there, it's trivial to probe a remote peers mempool
 22 2016-02-18T01:13:39  <gmaxwell> at the moment.
 23 2016-02-18T01:13:46  <gmaxwell> though we should fix that.
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 25 2016-02-18T01:14:18  <phantomcircuit> gmaxwell, uh, how?
 26 2016-02-18T01:14:37  <gmaxwell> Sufficiently advanced magic.
 27 2016-02-18T01:14:54  <phantomcircuit> it seems a fundamentally difficult thing to do
 28 2016-02-18T01:16:26  <phantomcircuit> gmaxwell, http://pastebin.com/raw/X9Q1LM2C
 29 2016-02-18T01:16:37  <phantomcircuit> that's an amusingly sophisticated understanding of fees actually
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 31 2016-02-18T01:20:23  <gmaxwell> phantomcircuit: the obvious way to do is is to run seperate logical mempools.
 32 2016-02-18T01:21:21  <phantomcircuit> gmaxwell, what like one for each peer and then do de-duplication of the actual data?
 33 2016-02-18T01:24:52  <gmaxwell> phantomcircuit: or the same but pivoting the table structure. e.g. for each mempool transaction keep track of which peers it's in mempool for.
 34 2016-02-18T01:25:28  <gmaxwell> (this could be much more efficient than the current maps used for known txn)
 35 2016-02-18T01:29:00  <midnightmagic> application-aware blinding proxies go away then i think..?
 36 2016-02-18T01:29:55  <phantomcircuit> gmaxwell, i guess it would be enough to just keep track of which transactions a peer has sent you and then request any transaction a peer sends that isn't duplicate
 37 2016-02-18T01:30:59  <gmaxwell> phantomcircuit: yes but not efficient.
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 40 2016-02-18T01:33:59  <phantomcircuit> gmaxwell, rolling bloom filter would work for that where entries are only added to the filter when accepted to the mempool
 41 2016-02-18T01:34:47  <phantomcircuit> not perfect but certainly better than what we have today
 42 2016-02-18T01:35:08  <phantomcircuit> either way i dont actually see why we would care that our peers know our exact minimum mempool feerate requirement
 43 2016-02-18T01:39:06  <gmaxwell> phantomcircuit: the reason, afaik, is to just reduce correlation. Where you can tell that a given v4 and hs node is the same node. Given that there are so many other ways to correlate right now it may be pointless.
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 45 2016-02-18T01:49:17  <phantomcircuit> gmaxwell, i certainly would not run a node accessible from anything other than tor as a hidden service and think that correlation wasn't possible if not likely
 46 2016-02-18T01:50:01  <phantomcircuit> and i actually think it would be extremely dangerous to tell anybody otherwise no matter how much effort is put into removing possible correlations
 47 2016-02-18T01:50:20  <phantomcircuit> s/dangerous/irresponsible/
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 55 2016-02-18T03:52:14  <morcos> phantomcircuit: are you just talking about the FilterRounder code that is "vastly more complex"?
 56 2016-02-18T03:53:04  <morcos> I agree that the obfuscation has limited value, but when I actually implemented it, I was surprised by how neatly packaged away it was.  I don't see what other parts of the implmentation are unnecessary.
 57 2016-02-18T03:54:24  <morcos> Without the FilterRounder code, it is completely trivial to correlate nodes, so it seemed worthwhile to avoid that if it could be done easily, and in the end I kind of like the quantization, it saves broadcasting unnecessary feefilter messages quite often.
 58 2016-02-18T03:55:24  <phantomcircuit> morcos, well for example, why did you have to change AcceptToMemoryPool at all?
 59 2016-02-18T03:56:58  <morcos> phantomcircuit: thats for responding for a feefilter message.  how are you supposed to know whether the tx you are about to send an inv for falls below the fee filter your peer sent you?
 60 2016-02-18T03:57:23  <morcos> you have to know the feerate of the inv's you are about to relay
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 62 2016-02-18T03:59:02  <phantomcircuit> morcos, hmm for dependency tracking i see
 63 2016-02-18T03:59:27  <morcos> dependency?
 64 2016-02-18T03:59:39  <morcos> no these are all just individual fee rates
 65 2016-02-18T04:00:31  <phantomcircuit> hmm ok i can see why you did it this way
 66 2016-02-18T04:01:02  <phantomcircuit> it's structurally ugly but not because of anything you did
 67 2016-02-18T04:01:07  <morcos> yeah calculating a fee for a tx requires work, and that work is already being done in ATMP which is almost always called right before RelayTransaction
 68 2016-02-18T04:01:40  <phantomcircuit> there should probably be something like CTransaction that knows about the outputs it's inputs are trying to spend
 69 2016-02-18T04:01:57  <phantomcircuit> but well.. effort
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 82 2016-02-18T06:34:19  <phantomcircuit> gmaxwell, there doesn't seem to be any sane way to set the vfReachable flags
 83 2016-02-18T06:38:45  <gmaxwell> set it if you're bound on it (and in the case of tor, have a onion/proxy set); it shouldn't be harmful to be reachable when not.
 84 2016-02-18T06:41:27  <phantomcircuit> gmaxwell, for the most common setup that doesn't work at all though, ipv4 w/o ipv6 behind nat
 85 2016-02-18T06:41:39  <phantomcircuit> it seems like we'd do better to only use the IsLimited flags
 86 2016-02-18T06:45:44  <GitHub102> [bitcoin] pstratem opened pull request #7553: Remove vfReachable and modify IsReachable to only use vfLimited. (master...2016-02-17-reachable) https://github.com/bitcoin/bitcoin/pull/7553
 87 2016-02-18T07:02:58  <sipa> Reachable used to take into account whether you were bound to a publicly routable address
 88 2016-02-18T07:06:49  <phantomcircuit> sipa, it still does, but that's essentially meaningless for peers behind NAT
 89 2016-02-18T07:09:39  <sipa> it's also harmless for thrm
 90 2016-02-18T07:09:52  <sipa> (they don't get a publicly routable address)
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 93 2016-02-18T07:22:52  <phantomcircuit> sipa, it's not harmless IsReachable is used to decide whether addresses received are added to addrman
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 95 2016-02-18T07:25:18  <phantomcircuit> if you're running with dnsseed=0 you'll end up only connected to the hard coded dns seeds... ever
 96 2016-02-18T07:25:37  <phantomcircuit> er hard coded seeds
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103 2016-02-18T07:53:59  <wumpus> going to tag -final today - anyone that still has plans to update the release notes, please let me know asap
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105 2016-02-18T07:58:03  * btcdrak orders champaign
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110 2016-02-18T08:25:37  <wumpus>  * [new tag]         v0.12.0 -> v0.12.0
111 2016-02-18T08:26:00  * btcdrak highfives wumpus
112 2016-02-18T08:26:13  <wumpus> party!
113 2016-02-18T08:28:46  <brg444> cheers, good work guys
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119 2016-02-18T09:03:05  <JackH> this is it? 0.12 today?
120 2016-02-18T09:03:20  <btcdrak> fire up your gitian builders...
121 2016-02-18T09:03:44  <JackH> \o/
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123 2016-02-18T10:06:50  <GitHub107> [bitcoin] laanwj closed pull request #7429: 0.12 release notes: Sort by importance to usability (0.12...0.12-sort-release-notes) https://github.com/bitcoin/bitcoin/pull/7429
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126 2016-02-18T11:44:07  <randy-waterhouse> wd
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145 2016-02-18T13:54:13  * jonasschnelli is back from holidays and is gitian building v0.12.0 now..
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147 2016-02-18T14:29:38  <btcdrak> jonasschnelli: wb
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169 2016-02-18T15:54:30  <wumpus> welcome back jonasschnelli! hope you had a good holiday
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171 2016-02-18T15:58:27  <wumpus> re: gitian building, make sure you wipe your cache if you built 0.12.x before, there has been at least one toolchain change in ubuntu trusty which isn't detected automatically
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175 2016-02-18T16:16:45  <jonasschnelli> wumpus: Thanks! Will clear the 0.12 caches and rebuild.
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181 2016-02-18T16:57:09  <instagibbs> wumpus, is there still time to fix release notes :X
182 2016-02-18T16:57:33  <wumpus> well it doesn't make sense to change them on the branch anymore
183 2016-02-18T16:58:11  <instagibbs> ok, well the description of pruned wallet mode disabling importaddress, privkey are wrong, which might confuse some
184 2016-02-18T16:58:33  <wumpus> e.g. after this, the release notes on the 0.12 branch will be cleared for 0.12.1
185 2016-02-18T16:59:38  <wumpus> it's a bit annoying, what we can do is copy the release notes to the master branch under doc/release-notes/0.12.0.md and do post-humous fixes there
186 2016-02-18T17:00:01  <wumpus> (that should be done in any case)
187 2016-02-18T17:00:42  <sipa> it would be a bit silly to do a 0.12.1 with as release notes "Improve release notes for 0.12.0"
188 2016-02-18T17:01:05  <JackH> make it :D
189 2016-02-18T17:01:18  <instagibbs> errata for release notes in master maybe
190 2016-02-18T17:02:09  <wumpus> or just copy the release notes to a gist and fix them there. I don't know which set of release notes people will actually read, if it's the ones I copy in the release announcement then it could come from anywhere :p
191 2016-02-18T17:07:11  <instagibbs> usually it's me googling "0.11 release notes" whatever shows up first :D
192 2016-02-18T17:10:32  <GitHub159> [bitcoin] laanwj pushed 1 new commit to master: https://github.com/bitcoin/bitcoin/commit/0e3ccbfb26b11ea3d9ed7dfd39886d69097286e1
193 2016-02-18T17:10:33  <GitHub159> bitcoin/master 0e3ccbf Wladimir J. van der Laan: doc: Add historical release notes for 0.10.4 0.11.2 and 0.12.0
194 2016-02-18T17:10:42  <wumpus> now you can edit them in master
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198 2016-02-18T17:33:18  <GitHub21> [bitcoin] vlamer opened pull request #7555: Merge pull request (master...master) https://github.com/bitcoin/bitcoin/pull/7555
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203 2016-02-18T17:40:13  <GitHub125> [bitcoin] laanwj closed pull request #7555: Merge pull request (master...master) https://github.com/bitcoin/bitcoin/pull/7555
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207 2016-02-18T18:18:51  <GitHub54> [bitcoin] morcos opened pull request #7556: Some cleanup work for mempool and policy estimator (master...cleanupMempool) https://github.com/bitcoin/bitcoin/pull/7556
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210 2016-02-18T18:25:36  <GitHub51> [bitcoin] morcos opened pull request #7557: Encapsulate options for mempool policy (master...policyOptions) https://github.com/bitcoin/bitcoin/pull/7557
211 2016-02-18T18:44:38  <michagogo> Gitian's churning right now, building the second set of Linux tests atm
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213 2016-02-18T19:04:04  <wumpus> #meetingstart
214 2016-02-18T19:04:07  <wumpus> #startmeeting
215 2016-02-18T19:04:07  <lightningbot> Meeting started Thu Feb 18 19:04:07 2016 UTC.  The chair is wumpus. Information about MeetBot at http://wiki.debian.org/MeetBot.
216 2016-02-18T19:04:07  <lightningbot> Useful Commands: #action #agreed #help #info #idea #link #topic.
217 2016-02-18T19:04:37  <wumpus> topics?
218 2016-02-18T19:05:02  <btcdrak> suggested topic #7187 since it relates to the recent merge og 7184
219 2016-02-18T19:05:08  <paveljanik> release status? :-)
220 2016-02-18T19:05:32  <wumpus> from previous meeting: ACTION: review/test/merge #7148 and #6564 (wumpus, 19:19:10)
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222 2016-02-18T19:05:43  <morcos> i'm happy to discuss fee filter if anyone wants
223 2016-02-18T19:06:26  <btcdrak> wumpus typo it was #7184. which has been merged. #6564 became #7524 which has been merged too
224 2016-02-18T19:06:59  <btcdrak> paveljanik: just waiting on gitian signers
225 2016-02-18T19:07:04  <wumpus> yes, mempool only BIP-112 and BIP-68 were merged
226 2016-02-18T19:07:08  <wumpus> paveljanik: it has been tagged
227 2016-02-18T19:07:26  <btcdrak> wumpus: so 7187 is an optimisation patch that builds on 7184
228 2016-02-18T19:07:43  <wumpus> I haven't really looked at the fee filter, maybe better to make that an action point and discuss it next week
229 2016-02-18T19:07:51  <btcdrak> "Keep reorgs fast for SequenceLocks checks #7187"
230 2016-02-18T19:08:15  <michagogo> My linux build's done, Windows being prepped now
231 2016-02-18T19:08:19  <wumpus> #action reviw 'Implement "feefilter" P2P message' #7542
232 2016-02-18T19:08:21  <morcos> wumpus: sure.
233 2016-02-18T19:08:33  <michagogo> Oh, sorry! Didn't realize meeting was going on
234 2016-02-18T19:08:51  <morcos> is the topic 7187 now?
235 2016-02-18T19:09:22  <wumpus> we dont' have a topic yet :)
236 2016-02-18T19:09:32  * btcdrak makes wumpus a coffee
237 2016-02-18T19:09:36  <wumpus> #topic Keep reorgs fast for SequenceLocks checks 7187
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239 2016-02-18T19:09:56  <morcos> The idea behind 7187 is that checking sequence locks to determine whether the tx is valid requires looking up the heights of all its inputs.  In a reorg, as it stands now, this will require reevaluating the inputs of every single tx in the mempool
240 2016-02-18T19:10:03  <morcos> That is obviously painful
241 2016-02-18T19:10:24  <wumpus> yes, that sounds expensive
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243 2016-02-18T19:10:39  <morcos> 7187 attempts to cache for each tx the block hash of the latest block containing an input which had a sequence lock
244 2016-02-18T19:11:12  <morcos> In the event of a reorg, if that hash is still on the chain, you know the previously calculated height and time (also cached) are still valid.
245 2016-02-18T19:11:20  <morcos> thus ideally you won't have to look up most txs
246 2016-02-18T19:11:21  <wumpus> sounds sensible
247 2016-02-18T19:11:36  <morcos> so i think we should backport that to at least 0.12
248 2016-02-18T19:11:46  <btcdrak> morcos: without a doubt.
249 2016-02-18T19:11:49  <wumpus> yes
250 2016-02-18T19:11:57  <morcos> it's not clear to me whether its worth the effort for 0.11, which already is way slower
251 2016-02-18T19:12:07  <morcos> it'll still be functionally correct without it
252 2016-02-18T19:12:21  <morcos> just reorgs will be slow
253 2016-02-18T19:12:24  <wumpus> probably not - better to keep the patch for 0.11 as small and simple as possible
254 2016-02-18T19:12:40  <wumpus> it will get less testing after all
255 2016-02-18T19:13:28  <morcos> so now we need to review/test 7187 and get it merged?
256 2016-02-18T19:13:34  <wumpus> and  with all the changes to the mempool in 0.12 it will probably be non-trivial to backport that optimization
257 2016-02-18T19:13:46  <morcos> wumpus: thats what i'd be afraid of
258 2016-02-18T19:14:07  <wumpus> which increses the risk further
259 2016-02-18T19:14:24  <wumpus> #action review/test #7187 Keep reorgs fast for SequenceLocks checks
260 2016-02-18T19:14:30  <btcdrak> morcos was telling me the bip68-sequence.py RPC tests should test regression
261 2016-02-18T19:14:30  <wumpus> I've already added the needs backport tag
262 2016-02-18T19:14:45  <morcos> ha ha, thats more assertiveness than i intended
263 2016-02-18T19:15:13  <btcdrak> morcos: maybe add a specific test for regression?
264 2016-02-18T19:15:36  <morcos> there are some reorgs in the bip68 test, but i haven't looked at exactly what they do recently
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266 2016-02-18T19:16:28  <sdaftuar> i think there's a test that at least is theoretically checking that sequence locked transactions are correctly removed during a reorg
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268 2016-02-18T19:18:30  <morcos> great, well quick meeting today?
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270 2016-02-18T19:18:41  <wumpus> I think so
271 2016-02-18T19:18:56  <btcdrak> no more topics?
272 2016-02-18T19:18:59  <btcdrak> I have one
273 2016-02-18T19:19:13  <morcos> congrats on getting 0.12 tagged wumpus.  you should take a long weekend!
274 2016-02-18T19:19:16  <wumpus> don't think there's much to discuss, no snags yet with the mempool BIP68/112 merges
275 2016-02-18T19:19:41  <btcdrak> yeah went well. I'm working on a patch for the softforks btw.
276 2016-02-18T19:19:42  <shea256> yes great work!
277 2016-02-18T19:19:42  <wumpus> morcos: thanks :)
278 2016-02-18T19:20:14  <wumpus> congrats to everyone on 0.12
279 2016-02-18T19:20:36  <wumpus> #endmeeting
280 2016-02-18T19:20:36  <lightningbot> Meeting ended Thu Feb 18 19:20:36 2016 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)
281 2016-02-18T19:20:36  <lightningbot> Minutes:        http://www.erisian.com.au/meetbot/bitcoin-core-dev/2016/bitcoin-core-dev.2016-02-18-19.04.html
282 2016-02-18T19:20:36  <lightningbot> Minutes (text): http://www.erisian.com.au/meetbot/bitcoin-core-dev/2016/bitcoin-core-dev.2016-02-18-19.04.txt
283 2016-02-18T19:20:36  <lightningbot> Log:            http://www.erisian.com.au/meetbot/bitcoin-core-dev/2016/bitcoin-core-dev.2016-02-18-19.04.log.html
284 2016-02-18T19:20:50  <btcdrak> wumpus: Would it be possible for us to arrange open source licenses of the Jetbrains IDEs for C++ and Python? They offer free licenses to projects like this
285 2016-02-18T19:21:43  <btcdrak> wumpus: just needs a maintainer to apply basically https://www.jetbrains.com/buy/opensource/?product=clion
286 2016-02-18T19:22:18  <btcdrak> their IDEs are CLion and PyCharm, they are incredibly good.
287 2016-02-18T19:22:19  <wumpus> btcdrak: yes I think so, if anyone is interested in that I can do that
288 2016-02-18T19:22:27  <btcdrak> wumpus: please do!
289 2016-02-18T19:24:00  <btcdrak> wumpus: link to the form https://www.jetbrains.com/shop/eform/opensource (add CLion & PyCharm)
290 2016-02-18T19:25:22  <btcdrak> If anyone wants to review the 0.12 blog post, most welcome https://github.com/bitcoin-core/bitcoincore.org/pull/116
291 2016-02-18T19:26:50  <sipa> oh, i forgot about the meeting!
292 2016-02-18T19:27:22  <btcdrak> oh sipa, shea256 has some questions about libsecp256k1
293 2016-02-18T19:27:37  <shea256> yes, can I grab you for a minute
294 2016-02-18T19:28:24  <sipa> sure!
295 2016-02-18T19:28:36  <shea256> cool, I'll message you
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297 2016-02-18T19:28:53  <sipa> wumpus: congrats indeed!
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299 2016-02-18T19:33:49  <morcos> btcdrak: What is Improved Rules for Transaction Relaying referring to in the blog post?
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301 2016-02-18T19:34:23  <btcdrak> morcos: speak to shea256 (he's @ryan on Slack)
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307 2016-02-18T20:04:27  <sipa> master does not compile?
308 2016-02-18T20:04:40  <sipa> util.cpp: In function ‘std::string CopyrightHolders(const string&)’:
309 2016-02-18T20:04:43  <sipa> util.cpp:841:53: error: ‘COPYRIGHT_HOLDERS’ was not declared in this scope
310 2016-02-18T20:05:32  <helo> sipa: did you clean? some toolchain changes may require it
311 2016-02-18T20:05:35  <morcos> make clean and autogen
312 2016-02-18T20:05:49  <sipa> ok
313 2016-02-18T20:06:18  <btcdrak> I had to git clean -dfx
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333 2016-02-18T20:22:56  <instagibbs> sipa, you have to clean yeah
334 2016-02-18T20:22:58  <instagibbs> had same issue
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355 2016-02-18T21:51:46  <michagogo> Okay, my sigs are up
356 2016-02-18T21:52:02  <michagogo> Is achow101 in here by a different name?
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362 2016-02-18T22:16:51  <michagogo> midnightmagic: I don't suppose you ever figured out what was different about your system, did you?
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386 2016-02-18T23:52:03  <midnightmagic> michagogo: part of it was that windows cache problem: I build gitian a lot, locally, and I guess I managed to get into that state where cache was messing me up. Right now, I suspect the < rc5 is no longer gitian'able by anyone. All I did, personally, was alter my build script to delete the cache if the version string was >= 0.12.0
387 2016-02-18T23:52:38  <michagogo> Well, I would think it can still be built
388 2016-02-18T23:53:02  <michagogo> But any sigs from a certain point on will not match the ones from before that point
389 2016-02-18T23:53:17  <midnightmagic> michagogo: in terms of OS/X, I switched back on LXC for the build process and it's working for me now. At this point, honestly, the fact that I build completely out of lock-step with what the rest of you build is to blame and changing state of the system is the main cause.
390 2016-02-18T23:53:40  <michagogo> (i.e. if a bunch of people went back and built, they should all match afaik)
391 2016-02-18T23:53:47  <midnightmagic> michagogo: it should be historically buildable or else people just have to take out word for it. if that's what you meant.
392 2016-02-18T23:53:52  <midnightmagic> oh
393 2016-02-18T23:54:06  <michagogo> But yeah, that Ubuntu change messed things up
394 2016-02-18T23:54:33  <michagogo> midnightmagic: afaik we're not all doing the same thing
395 2016-02-18T23:54:41  <midnightmagic> tor unfortunately has switched from ubuntu to debian for their build host, so now I have to teach my system how to run debian guests :(
396 2016-02-18T23:54:45  <michagogo> I know I'm using LXC, I think wumpus might be using KVM
397 2016-02-18T23:54:52  <midnightmagic> michagogo: I sure hope not. :( I hate being odd man out.
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399 2016-02-18T23:55:00  <midnightmagic> so to speak
400 2016-02-18T23:55:02  <michagogo> Not really sure what everyone uses
401 2016-02-18T23:55:29  <michagogo> Hm? It's more complicated than just running make-base-vm with the arguments for the right debian?
402 2016-02-18T23:57:44  <michagogo> Interesting, looks like Tor automates things more than we do
403 2016-02-18T23:57:45  <midnightmagic> michagogo: the vm-builder for Ubuntu can't do a debian guest. this guy has made progress doing it: https://bugs.launchpad.net/ubuntu/+source/vm-builder/+bug/235562 https://code.launchpad.net/~josephbisch/vmbuilder/debian
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405 2016-02-18T23:58:37  <midnightmagic> yeah, the tor stuff also verifies tag signatures, so as part of my modifications to get it co-existing with bitcoin gitian I have to maintain a minor fork. gitian doesn't play nice with itself.
406 2016-02-18T23:58:58  <midnightmagic> (just for tor though, the bitcoin stuff is unchanged)
407 2016-02-18T23:59:00  <michagogo> Ah, yeah. Looking at the gitian readme, I see "The official vmbuilder only includes support for Ubuntu guests, so you need to install [Joseph Bisch's fork of vmbuilder](https://github.com/josephbisch/vmbuilder), which adds a Debian plugin."
408 2016-02-18T23:59:26  <PRab> Minor complaint about gitian. If I wait to long to enter the sudo password after running ./bin/gbuild, it fails with "failed to run make-clean-vm..."
409 2016-02-18T23:59:45  <michagogo> PRab: KVM or LXC?
410 2016-02-18T23:59:59  <PRab> Um.. IDK.