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242017-09-18T03:25:36 <esotericnonsense> wow, syncing on the same host is quick. 25% progress in 24 minutes.
252017-09-18T03:25:44 <esotericnonsense> (unpruned)
262017-09-18T03:26:12 * esotericnonsense wonders if the whole thing would be sub-100.
272017-09-18T03:35:35 <sipa> it won't due to signature validation
282017-09-18T03:35:56 <sipa> which is only done after the assumevalid points
292017-09-18T03:36:03 <esotericnonsense> ah bugger yes.
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832017-09-18T09:40:03 <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/e278f86c5369...d6d2c8503c40
842017-09-18T09:40:03 <bitcoin-git> bitcoin/master a0b4c24 Dan Raviv: Trivial: Fix validation comments...
852017-09-18T09:40:04 <bitcoin-git> bitcoin/master d6d2c85 MarcoFalke: Merge #11340: Trivial: Fix validation comments...
862017-09-18T09:40:45 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11340: Trivial: Fix validation comments (master...patch-12) https://github.com/bitcoin/bitcoin/pull/11340
872017-09-18T10:15:05 *** promag has joined #bitcoin-core-dev
882017-09-18T10:29:13 <promag> is github user danra around?
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1132017-09-18T11:52:00 <meshcollider> promag: don't think so, never seen them in here
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1162017-09-18T12:19:50 <promag> ok
1172017-09-18T12:19:51 <promag> ty
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1272017-09-18T13:26:08 <BlueMatt_> jonasschnelli: you got a poly hash patch lying around somewhere I can just steal?
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1302017-09-18T13:27:09 <BlueMatt> hmm, guess not :/
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1412017-09-18T14:06:11 <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/d6d2c8503c40...44e1fd926cfb
1422017-09-18T14:06:12 <bitcoin-git> bitcoin/master e9e9391 John Newbery: [tests] Check connectivity before sending in assumevalid.py...
1432017-09-18T14:06:12 <bitcoin-git> bitcoin/master 44e1fd9 MarcoFalke: Merge #11345: [tests] Check connectivity before sending in assumevalid.py...
1442017-09-18T14:06:55 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11345: [tests] Check connectivity before sending in assumevalid.py (master...assume_valid_improvement) https://github.com/bitcoin/bitcoin/pull/11345
1452017-09-18T14:09:03 <achow101> do we have 0.15.0.1 detached signatures yet?>
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1492017-09-18T14:22:35 <jonasschnelli> BlueMatt: poly hash patch?
1502017-09-18T14:22:59 <jonasschnelli> You mean ChaCha20Poly1305? https://github.com/jonasschnelli/chacha20poly1305
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1522017-09-18T14:29:17 <BlueMatt> jonasschnelli: yea, essentially that, msotly I was lazy and didnt want to figure out what the reasonable implementation to take was :p
1532017-09-18T14:29:29 <BlueMatt> (well, meant integrated in bitcoind, but thats fine too)
1542017-09-18T14:29:57 <jonasschnelli> BlueMatt: that above is ripped out form openssl (and made it independent from anything else)
1552017-09-18T14:30:01 <jonasschnelli> openssh! sry
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1622017-09-18T14:40:21 <BlueMatt> ah, cool
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1642017-09-18T14:40:31 <BlueMatt> looks like its just the dona one
1652017-09-18T14:40:38 <BlueMatt> donna
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1952017-09-18T16:33:47 <RealM9> Bitcoin is again under a spam attack
1962017-09-18T16:33:50 <RealM9> https://imgur.com/a/Jxfvy
1972017-09-18T16:34:46 <RealM9> I know nobody here thinks about a way how to solve this, but i think it's a huge problem. Miners can spam network for free, if they work togather. Think about this. And antpool mines another VIP block
1982017-09-18T16:37:55 <RealM9> 14 MB mempool data of 100-140sat/byte TXes
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2002017-09-18T16:39:45 <andytoshi> miners can't spam any more cheaply than anybody else. 14 Mb at 100sat/byte is like $50000
2012017-09-18T16:39:52 <lvmbdv> oh god forbid something takes up 15 MB of my RAM :o
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2032017-09-18T16:40:16 <lvmbdv> and proof-of-work assumes the expenses of spamming the network would drive bad guys away
2042017-09-18T16:40:30 <RealM9> Well remember that mining is centralized and miners get fees
2052017-09-18T16:41:03 <RealM9> And some big block conference is happening soon
2062017-09-18T16:41:34 <andytoshi> #bitcoin please
2072017-09-18T16:42:03 <RealM9> Maybe core should create some anti-spam mechanisms on 0.15.1
2082017-09-18T16:42:44 <Chicago> ... until when? Until Micro-Bitcoins are a common denomination?
2092017-09-18T16:42:54 <RealM9> Because, you know that S2X fork is coming and if miners will spam, they will do it NOW. Before S2X
2102017-09-18T16:42:55 <gmaxwell> this is stupid. I haven't seen any evidence of spam, just people aggregating txs at very low feerates.
2112017-09-18T16:43:30 <RealM9> Isn't this evidence https://i.imgur.com/oCANzXW.png ?
2122017-09-18T16:43:42 <andytoshi> RealM9: i am answering you in #bitcoin
2132017-09-18T16:45:29 <gmaxwell> The only 'fix' to spam needed would be a magic want to stop people from putting up graphing sites that panic people about things the system already handled.
2142017-09-18T16:47:08 <RealM9> What if they started spamming for let's say, 2 weeks. Their big-block agenda would get only more popular and S2X would be a solution
2152017-09-18T16:48:15 <RealM9> Yeah, but there aren't really much to do about it without risking to delete legitimate TXes from mempool
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2172017-09-18T16:48:22 <gmaxwell> I looked last night when people first started squaking about that and it appeared to be due to txs like https://blockchain.info/tx/87cd70a1859f1029d7619ca6b745232e34b8627fc7ac1e2e50a4b2705c6aba48 which are just plain aggregation tx
2182017-09-18T16:49:08 <gmaxwell> RealM9: What if? who cares. You just pay a slightly higher feerate than them and they stop existing as far as you're concerned.
2192017-09-18T16:50:15 <gmaxwell> For every transaction paying feerate X they display by one block they have to pay x over again in fees. Even if it's a miner doing it the result is astronmically expensive.
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2212017-09-18T16:54:04 <RealM9> Hm, ok
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2272017-09-18T17:09:32 <jimpo> I have two PRs that have been lingering for a while, #11113 and #11116. Can I get another look from reviewers/maintainers? Otherwise I'll just close them.
2282017-09-18T17:09:34 <gribble> https://github.com/bitcoin/bitcoin/issues/11113 | [net] Ignore getheaders requests for very old side blocks. by jimpo · Pull Request #11113 · bitcoin/bitcoin · GitHub
2292017-09-18T17:09:35 <gribble> https://github.com/bitcoin/bitcoin/issues/11116 | [script] Unit tests for script/standard and IsMine functions. by jimpo · Pull Request #11116 · bitcoin/bitcoin · GitHub
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2392017-09-18T17:57:43 <instagibbs> jimpo, please don't close them, they both have at least one utACK
2402017-09-18T17:57:55 <instagibbs> 0.15 release means it's a better time to bug people likely
2412017-09-18T18:01:00 <sheldonthomas> Hi - please correct me if this isnât the place but Iâm experiencing a 100% reproducible crash on 0.15 on Mac OS X using the offical bitcoincore binaries (I verified their sha sums). Is this known/discussed or have their been similar reports or am I alone in experiencing this? My debug.log gets passed 2017-09-18 17:47:45 GUI: Platform customization: "macosx" and then I see a few UpdateTip messages go by and I have a system exception. Key
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2432017-09-18T18:01:01 <sheldonthomas> here is itâs 100% reproducible, happens every time. Crashed Thread: 0 Dispatch queue: com.apple.main-thread
2442017-09-18T18:01:02 <sheldonthomas> Exception Type: EXC_BAD_ACCESS (SIGSEGV)
2452017-09-18T18:01:04 <sheldonthomas> Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008
2462017-09-18T18:01:05 <sheldonthomas> Exception Note: EXC_CORPSE_NOTIFY
2472017-09-18T18:01:07 <sheldonthomas> Termination Signal: Segmentation fault: 11
2482017-09-18T18:01:08 <sheldonthomas> Termination Reason: Namespace SIGNAL, Code 0xb
2492017-09-18T18:01:08 <sheldonthomas> Terminating Process: exc handler [0]
2502017-09-18T18:02:09 <sheldonthomas> Note that the first time I ran 0.15 the UTXO set upgrade completed just fine. A moment later it crashed and now crashes every time.
2512017-09-18T18:02:51 <sipa> sheldonthomas: please open an issue on https://github.com/bitcoin/bitcoin/issues
2522017-09-18T18:04:00 <sheldonthomas> Okay. Itâs not possible to run 0.14.2 after youâve done the UTXO set db upgrade, correct?
2532017-09-18T18:04:16 <sipa> indeed
2542017-09-18T18:05:10 <sheldonthomas> ok, will open an issue. this effectively locks users out of their wallets since the program wonât run and the prior version cannot be run.
2552017-09-18T18:05:48 <sipa> you're always able to reindex (start with -reindex-chainstate flag)
2562017-09-18T18:05:57 <sipa> but maybe you want to help debug the issue
2572017-09-18T18:06:13 <sipa> oh
2582017-09-18T18:06:18 <achow101> sipa: sheldonthomas it's probably related to #11171
2592017-09-18T18:06:20 <sipa> try updating to 0.15.0.1
2602017-09-18T18:06:21 <gribble> https://github.com/bitcoin/bitcoin/issues/11171 | RC2 Exits After Initialization · Issue #11171 · bitcoin/bitcoin · GitHub
2612017-09-18T18:06:40 <sipa> there is a known issue that can cause a crash
2622017-09-18T18:06:43 <achow101> sheldonthomas: please pastebin the contents of ~/Library/Preferences/org.bitcoin.Bitcoin-Qt.plist
2632017-09-18T18:06:50 <achow101> sheldonthomas: then start Bitcoin Core with -resetguisettings
2642017-09-18T18:06:58 <achow101> but I need to see the contents of that file first
2652017-09-18T18:07:27 <achow101> sipa: 0.15.0.1 is not released yet (no codesigned gitian builds yet, not posted to bitcoin.org)
2662017-09-18T18:07:36 <sipa> achow101: thanks, i've been out of the loop
2672017-09-18T18:09:39 <sheldonthomas> my editor shows that plist with some garbled binary, shall I pastebin that as utf8 out?
2682017-09-18T18:09:48 <achow101> yes
2692017-09-18T18:11:00 <sheldonthomas> https://pastebin.com/jHYvg2NE
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2712017-09-18T18:12:10 <sheldonthomas> Iâm running it via a command in my path like: open /Applications/bitcoin15/Bitcoin-Qt.app/ --args -datadir=ââ¦â
2722017-09-18T18:13:27 <achow101> wow, that's a weird looking file
2732017-09-18T18:13:54 <achow101> I thought plist files were xml like
2742017-09-18T18:14:18 <sheldonthomas> I can run it through a util. One moment
2752017-09-18T18:14:21 <sipa> sheldonthomas: can you paste a hexdump instead?
2762017-09-18T18:15:15 <sheldonthomas> sipa: https://pastebin.com/N3FjsnWE
2772017-09-18T18:16:39 <sheldonthomas> Thereâs nothing out of the ordinary in debug.log
2782017-09-18T18:17:33 <achow101> sheldonthomas: the hexdump should be enough to decipher this I think.
2792017-09-18T18:17:43 <achow101> start Bitcoin Core with the -resetguisettings option
2802017-09-18T18:17:54 <sheldonthomas> okay i was about to try the other one, the reindex one too
2812017-09-18T18:17:56 <achow101> backup the plist file first to some other place first
2822017-09-18T18:18:00 <sheldonthomas> should i do both, or the other...
2832017-09-18T18:18:04 <sheldonthomas> Ok Iâll back that up
2842017-09-18T18:18:16 <achow101> -resetguisettings is all you need to do. I believe this problem is #11171
2852017-09-18T18:18:17 <gribble> https://github.com/bitcoin/bitcoin/issues/11171 | RC2 Exits After Initialization · Issue #11171 · bitcoin/bitcoin · GitHub
2862017-09-18T18:19:59 <sheldonthomas> Just noticed I have another plist called org.bitcoinfoundation.Bitcoin-Qt.plist should I remove that?
2872017-09-18T18:20:01 <arubi> it's kinda cool how it goes through all control characters from a->z
2882017-09-18T18:20:56 <achow101> sheldonthomas: can you pastebin that too?
2892017-09-18T18:21:01 <achow101> and back it up
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2912017-09-18T18:28:02 <sheldonthomas> achow: here is that dump https://pastebin.com/n2JSmSbp
2922017-09-18T18:28:39 <sheldonthomas> Am going to add resetguisettings to my bitcoin.conf will that suffice?
2932017-09-18T18:29:26 <achow101> sheldonthomas: that will work. don't forget to remove that after you start Bitcoin Core otherwise you will be resetting those settings on every start
2942017-09-18T18:30:51 <sheldonthomas> I guess it needs resetguisettings=1 ?
2952017-09-18T18:31:05 <sipa> yes
2962017-09-18T18:31:29 <sheldonthomas> seems to have fixed it.
2972017-09-18T18:31:32 <sheldonthomas> bitcoin core cruising again.
2982017-09-18T18:31:47 <sheldonthomas> much thanks
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3052017-09-18T19:13:57 <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/44e1fd926cfb...4ce2f3d0d333
3062017-09-18T19:13:57 <bitcoin-git> bitcoin/master 1817398 Cory Fields: mininode: add an optimistic write and disable nagle...
3072017-09-18T19:13:58 <bitcoin-git> bitcoin/master 4ce2f3d MarcoFalke: Merge #11323: mininode: add an optimistic write and disable nagle...
3082017-09-18T19:14:31 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11323: mininode: add an optimistic write and disable nagle (master...optimistic-mininode) https://github.com/bitcoin/bitcoin/pull/11323
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3342017-09-18T21:13:12 <promag> jnewbery: any reason to jump to -32 in https://github.com/bitcoin/bitcoin/pull/11031/files#diff-7563bce5f7cf8ee3e5568afc8578e9e7R60?
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3382017-09-18T21:24:12 <bitcoin-git> [bitcoin] practicalswift opened pull request #11361: Remove redundant LOCK(â¦) and AssertLockHeld(â¦) (master...remove-redundant-locks) https://github.com/bitcoin/bitcoin/pull/11361
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3422017-09-18T21:48:42 <jnewbery> promag: -29, -30 and -31 are already taken (look in the 'P2P client errors' section below)
3432017-09-18T21:49:28 <promag> doh
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3452017-09-18T21:51:41 <promag> btw, just a little nit :P commit message should be sentence case?
3462017-09-18T21:54:47 <jnewbery> Thanks! Fixed
3472017-09-18T22:03:55 <jonasschnelli> cfields_: can you have a final look at https://github.com/bitcoin/bitcoin/pull/11113?
3482017-09-18T22:04:07 <jonasschnelli> Has some acks, ... but misses yours?
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3502017-09-18T22:17:16 <promag> jonasschnelli: btw https://github.com/bitcoin/bitcoin/pull/11281#pullrequestreview-63497928
3512017-09-18T22:18:00 <promag> jnewbery: wdyt https://github.com/bitcoin/bitcoin/pull/10552#issuecomment-330271664 ?
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3572017-09-18T22:58:40 <goatpig> are there still milestones hardcoded in for boostrapping the chainstate db?
3582017-09-18T23:00:36 <luke-jr> checkpoints? yes
3592017-09-18T23:00:50 <luke-jr> although in Core, they haven't been updated in a long time (intentionally)
3602017-09-18T23:03:37 <gmaxwell> "for boostrapping the chainstate db?" for that, no there has never been anything like that.
3612017-09-18T23:05:40 <goatpig> i mean the set of milestones to check hashes instead of signatures for early chain data
3622017-09-18T23:05:46 <goatpig> luke-jr: why have they not been updated?
3632017-09-18T23:07:27 <sipa> goatpig: we want to get rid of checkpoints
3642017-09-18T23:07:52 <sipa> their functionality has been replaced by headers-first sync & assumevalid
3652017-09-18T23:08:20 <sipa> (almost, but not entirely - they still protect against a weak memory exhaustion attack, but old checkpoints suffice for that)
3662017-09-18T23:08:45 <goatpig> ah so the feature has been replaced
3672017-09-18T23:08:56 <sipa> assumevalid is maybe what you're after - it's a configurable block hash we know has valid signatures in its history
3682017-09-18T23:09:07 <goatpig> yeah that';s what im after
3692017-09-18T23:09:08 <sipa> but it doesn't force the client to only accept that chain (as checkpoints did)
3702017-09-18T23:09:23 <sipa> they just bypass validation IF that chain we to otherwise be validated
3712017-09-18T23:09:34 <goatpig> but there is a default hardcoded value in the code that's being updated now?
3722017-09-18T23:09:55 <sipa> that's correct
3732017-09-18T23:10:02 <goatpig> ok that's what i wanted to know
3742017-09-18T23:10:03 <goatpig> thanks
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3762017-09-18T23:11:01 <sipa> https://github.com/bitcoin/bitcoin/blob/master/src/chainparams.cpp#L107
3772017-09-18T23:11:26 <goatpig> that's the current one in 0.15 right?
3782017-09-18T23:11:34 <sipa> yes
3792017-09-18T23:11:39 <goatpig> thanks a lot
3802017-09-18T23:13:11 <gmaxwell> goatpig: these thigns do not fix a particular chain, and only have an effect if they're in our best chain and burried by a couple weeks work.
3812017-09-18T23:14:11 <goatpig> you mean if you are exposed to a chain that branches before the assume valid hash and that it's longer than the assumed one, it would check all sigs in that branch regardless?
3822017-09-18T23:14:18 <sipa> yes
3832017-09-18T23:14:25 <goatpig> sure, makes sense
3842017-09-18T23:17:03 <promag> in that case doesn't make sense to assume valid from the fork backwards?
3852017-09-18T23:18:15 <goatpig> im guessing it does assumevalid up until the branch point, then drops the behavior as soon as it forks
3862017-09-18T23:18:26 <sipa> promag: assumevalid=X means that script validation is skipped for any block that is an ancestor of X
3872017-09-18T23:18:36 <sipa> so i think it does what you're saying
3882017-09-18T23:18:50 <gmaxwell> sipa: no, not if the assumevalid block is not in the best chain.
3892017-09-18T23:19:04 <gmaxwell> promag: potentially but thats a dumb situation: Don't set the value on a fork and then there is no need for code to handle that case, nor need for tests to test it. :)
3902017-09-18T23:19:48 <gmaxwell> but yes, I believe that what you suggest would be fine (other than the unnecessary complexity)
3912017-09-18T23:20:09 <goatpig> gmaxwell: then what's the decision in case of a fork? don't forward the assumevalid hash past that fork point for ages?
3922017-09-18T23:20:48 <sipa> goatpig: i'm confused
3932017-09-18T23:21:29 <goatpig> gmax saying assumevalid does not afford you bypassing sig checks if the assumed valid hash is on the shortest branch of a fork
3942017-09-18T23:21:37 <gmaxwell> goatpig: if its ambiguous what chain is correct for ages we have bigger problems.
3952017-09-18T23:22:11 <achow101> goatpig: if the assumevalid block is not in your best chain, then you will be validating all signatures
3962017-09-18T23:22:16 <gmaxwell> what I've been doing on updating them is setting it to a most recent block when I open the PR, and just checking that it's still in the chain by the time the PR is ready to be merged.
3972017-09-18T23:22:23 <goatpig> therefor, how do you handle forks with that updating that hardcoded hash in the case there is a potential for the fork to sustain 2 semi equivalent branches (in term of work)
3982017-09-18T23:22:33 <achow101> if the best chain changed to not include the assumevalid hash, then all blocks you have already been verified won't be re-verified
3992017-09-18T23:22:34 <gmaxwell> if it were to fall out, oh well, sync would take somewhat longer. Not the end of the world.
4002017-09-18T23:22:58 <goatpig> ok
4012017-09-18T23:23:02 <goatpig> just curious about the whole mechanic
4022017-09-18T23:23:55 <gmaxwell> goatpig: if something like that went on for weeks it would be doubtful if bitcoin would continue to exist at the end of such an event, regardless tweaking forward assumevalid wouldn't be a high priority. ... losing it entirely isn't that big of a deal.
4032017-09-18T23:24:23 <goatpig> i get it
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4052017-09-18T23:26:11 <wampy> hello! v0.15.0.1 fixes the segfault I was getting upgrading from 0.14.2. Thanks to all who helped track that down
4062017-09-18T23:26:20 <gmaxwell> wampy: thanks!
4072017-09-18T23:27:02 <promag> > other than the unnecessary complexity gmaxwell: right, edge case.. better validate all :P
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4162017-09-18T23:35:45 <midnightmagic> lol https://pbs.twimg.com/media/DJw1oWRW4AEnICf.jpg
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4182017-09-18T23:42:56 <bitcoin-git> [bitcoin] gmaxwell opened pull request #11362: Remove nBlockMaxSize from miner opt struct as it is no longer used. (master...2017_09_rm_nBlockMaxSize) https://github.com/bitcoin/bitcoin/pull/11362
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