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 49 2019-04-17T07:38:28  <cjcj> I am trying have built and am trying to run Bitcoin Core 0.17.1 on Ubuntu, but when running bitcoind I get a segmentation fault almost immediately. https://pastebin.com/wKNbf4L9. I have also tried installing it from the ppa, and there it works fine. Why isn't the instance I built myself working though?
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 56 2019-04-17T08:41:43  <luke-jr> cjcj: can you get a backtrace?
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 61 2019-04-17T09:04:38  <cjcj> luke-jr: How do I get a backtrace?
 62 2019-04-17T09:05:16  <luke-jr> run it in gdb
 63 2019-04-17T09:05:22  <luke-jr> when it crashes, type: bt
 64 2019-04-17T09:07:51  <cjcj> luke-jr: here you go https://pastebin.com/3dphyymU
 65 2019-04-17T09:11:22  <luke-jr> are you sure it's 0.17.1 you're trying to build and run?
 66 2019-04-17T09:12:40  <cjcj> luke-jr: Running the compiled bitcoind binary with --version returns "Bitcoin Core Daemon version v0.17.1"
 67 2019-04-17T09:14:35  <luke-jr> type "up"<enter> 6 times, then "print file_path"
 68 2019-04-17T09:14:41  <luke-jr> at the gdb console
 69 2019-04-17T09:17:58  <cjcj> $1 = (const boost::filesystem::path &) @0x7fffffffcf40: {static separator = 47 '/',    static preferred_separator = 47 '/', static dot = 46 '.', m_pathname = "/home/c/.bitcoin2/"}
 70 2019-04-17T09:18:37  <luke-jr> where did you get the code? this doesn't look like Bitcoin at all
 71 2019-04-17T09:18:53  <luke-jr> unless you're manually setting datadir or something
 72 2019-04-17T09:19:19  <cjcj> Yeah, since Bitcoin Core from ppa works I didn't want to mess with the original .bitcoin, so I manually set datadir to .bitcoin2
 73 2019-04-17T09:19:31  <luke-jr> does the PPA one work with .bitcoin2?
 74 2019-04-17T09:20:18  <cjcj> Yes
 75 2019-04-17T09:21:33  <cjcj> Trying the compiled version on .bitcoin yields the same result
 76 2019-04-17T09:21:47  <luke-jr> down<enter>print strPath
 77 2019-04-17T09:23:06  <cjcj> $1 = "/home/c/.bitcoin2"
 78 2019-04-17T09:24:24  <luke-jr> print GetArg("-wallet", "NOPE")
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 80 2019-04-17T09:25:39  <cjcj> luke-jr: No symbol "GetArg" in current context.
 81 2019-04-17T09:26:27  <luke-jr> hmm
 82 2019-04-17T09:27:29  <luke-jr> 4x "up"<enter>
 83 2019-04-17T09:27:35  <luke-jr> print wallet_file
 84 2019-04-17T09:28:07  <cjcj> $2 = <optimized out>
 85 2019-04-17T09:28:25  <luke-jr> print wallet_path
 86 2019-04-17T09:28:43  <cjcj> $3 = {static separator = 47 '/', static preferred_separator = 47 '/', static dot = 46 '.',    m_pathname = "/home/c/.bitcoin2"}
 87 2019-04-17T09:29:14  <luke-jr> what is your command line?
 88 2019-04-17T09:29:20  <luke-jr> do you have a bitcoin.conf file?
 89 2019-04-17T09:29:41  <cjcj> Yes, only line in it is txindex=1
 90 2019-04-17T09:30:19  <luke-jr> what is your command line?
 91 2019-04-17T09:30:33  <cjcj> What do you mean?
 92 2019-04-17T09:30:40  <luke-jr> how are you running it?
 93 2019-04-17T09:31:02  <cjcj> gdb ./bitcoind, then r --datadir=/home/c/.bitcoin2
 94 2019-04-17T09:32:21  <luke-jr> gArgs.GetArg("-wallet", "NOPE")
 95 2019-04-17T09:32:24  <luke-jr> print gArgs.GetArg("-wallet", "NOPE")
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 97 2019-04-17T09:33:54  <cjcj> Undefined command gArgs
 98 2019-04-17T09:34:15  <cjcj> I get the following as well right after running in gdb: Thread 1 "bitcoind" received signal SIGSEGV, Segmentation fault. __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 120     ../sysdeps/x86_64/multiarch/../strlen.S: No such file or directory.
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100 2019-04-17T09:37:16  <luke-jr> print gArgs.GetArg("-wallet", "NOPE")
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102 2019-04-17T09:38:04  <cjcj> Invalid cast.
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105 2019-04-17T09:43:34  <luke-jr> print gArgs
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107 2019-04-17T09:50:11  <cjcj> luke-jr: https://pastebin.com/t2rbT1am
108 2019-04-17T09:51:22  <luke-jr> [09:31:02] <cjcj> gdb ./bitcoind, then r --datadir=/home/c/.bitcoin2 <-- you're SURE about that?
109 2019-04-17T09:51:41  <cjcj> Positive
110 2019-04-17T09:53:53  <cjcj> I will try reinstalling the system and build bitcoin core from scratch and see if the problem persists, unless there is some more info I can give you?
111 2019-04-17T09:54:01  <luke-jr> hold on
112 2019-04-17T09:54:03  <cjcj> ok
113 2019-04-17T09:54:09  <luke-jr> it actually does look normalish
114 2019-04-17T09:57:02  <cjcj> I tried building litecoin (v0.17.1rc1) which had the same results. With Litecoin I also tried building v0.16.x and received "configure: error: Could not link against boost_filesystem !" when running ./configure. Havent tried with Bitcoin Core v0.16.x though. Don't know if this helps.
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116 2019-04-17T10:02:18  <cjcj> Tried it now, and same thing with Bitcoin v0.16.3
117 2019-04-17T10:03:20  <luke-jr> same backtrace?
118 2019-04-17T10:03:53  <luke-jr> can you rebuild it with ./configure CXXFLAGS='-ggdb -O0' ?
119 2019-04-17T10:05:00  <cjcj> Sorry, my mistake, ./configure worked fine on 0.16.3.
120 2019-04-17T10:05:05  <cjcj> I'll do a rebuild
121 2019-04-17T10:05:39  <luke-jr> gdb provides a bit more info with -ggdb -O0 ☺
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129 2019-04-17T10:41:39  <cjcj> luke-jr: Very odd, now everything works just fine. The only other thing I did, apart from the gdb configure flag, was to unmount the hard drive I used for .bitcoin.
130 2019-04-17T10:42:03  <luke-jr> bad compiler maybe?
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132 2019-04-17T10:42:19  <luke-jr> could also be bad RAM I guess
133 2019-04-17T10:42:29  <cjcj> I had already rebuilt it several times before with the same result.
134 2019-04-17T10:42:46  <luke-jr> even a good compiler can affect the end memory layout
135 2019-04-17T10:43:09  <luke-jr> I'd probably run a memtest to be sure
136 2019-04-17T10:43:17  <luke-jr> last thing you want is corrupt private keys
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148 2019-04-17T12:01:32  <treehug88> Good morning, (or whatever time it is there). If I wanted to set up a lightning network node, what's the recommended path for ubuntu?  I see different docs suggesting different paths, wondering what people here would recommend to get rolling
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