Questions related to problems encountered while running the Bitcoin-related software.

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7
votes
1answer
65 views

Heartbleed bug and Altcoins

Bitcoin recently released V 0.9.1 patching vulnerabilities from the Heartbleed bug, however I have not seen anything from any alt coin. What are the possible security risks associated with using these ...
13
votes
1answer
440 views

What is Transaction Malleability?

The Bitcoin exchange MtGox has stated in this press release that "transaction malleability" caused them to stop sending bitcoins. A recent question asked if it really is an issue. But what is ...
16
votes
3answers
3k views

Is this “transaction malleability” really an issue?

The well-known Bitcoin exchange Mt.Gox last week suspended all Bitcoin withdrawals because of "technical issues", which today have been better described in this press release. This looks like a ...
7
votes
2answers
201 views

Satoshi's bitcoind implementation bugs

I have seen referred in a couple of locations (bitcd and bitcoinj) that fully verifying clients should match the satoshi bitcoind client implementation, including its bugs, presumably to prevent ...
6
votes
2answers
219 views

How do we know that the algorithm of Bitcoin does not embed bugs since inception?

I'm new to Bitcoin. My understanding as a trained economist (and not a programmer or IT expert) is that the key selling point of Bitcoin is the assignment of monetary policy prerogatives to an ...
3
votes
2answers
880 views

“Assertion Failed!” when I try to open Bitcoin Wallet

When I try to load my Bitcoin Wallet I get an "Assertion Failed!" window: here is what the window says: Program: C:\Program Files\Bitcoin\bitcoin-qt.exe File: src/main.cpp Line: 1761 Expression: ...
2
votes
1answer
172 views

Can the outputs of transactions with duplicate hashes be spent?

I've noticed that there are two transaction hashes that appear more than once in the blockchain. The reason for this is understandable: they sent mining rewards to the same address. These transactions ...
3
votes
2answers
398 views

Hashrate falls by factor of 1000x when now block is found?

Very often my mining hashrate falls from the usual ~550 Mhash/s to about 400-500 khash/s, and I have noticed direct correlation in time with messages like these: btcguild.com:8332 25/04/2013 ...
3
votes
0answers
513 views

What is “failed to read block” and how can this be fixed?

When I try to open my BitCoin wallet, I get a "failed to read block" message and it will not open. What does this mean and how can this be rectified?
8
votes
2answers
185 views

Given the recent <0.8 bug, when can we safely have larger block sizes?

Given the <0.8 bug and subsequent fork happened because of a particularly large block, does this mean that large blocks can not be used until the large majority of the community switches to 0.8? ...
0
votes
2answers
1k views

bitcoind: corrupted database?

looris@Palace-of-the-Nine-Moons:/tmp $ bitcoind looris@Palace-of-the-Nine-Moons:/tmp $ Bitcoin server starting ************************ EXCEPTION: St13runtime_error CLevelDB(): error opening ...
1
vote
1answer
131 views

ListAccounts JSON array data isn't consistently formatted (compared to ListReceivedByAccount)

When I perform a ListAccounts query I get this: { "result": { "": 0.0, "account": 0.0, "account3": 0.0, "account7": 0.0 }, "error": null, "id": "1" } However ...
2
votes
1answer
135 views

How was the overflow bug of 2010 detected? Should UINT64_MAX value transactions be considered suspicious?

The overflow bug of 2010 was a result of a client that summed two values together and reaching INT64_MAX instead of UINT64_MAX. Should transactions of INT64_MAX (or any similar constant) be treated ...
17
votes
1answer
455 views

Gaming the “off-by-one” bug (difficulty re-target based on 2015 instead of 2016 block time span)?

In this forum post from Gavin Andresen he writes: Second: I've written 'discourage blocks' infrastructure: https://github.com/gavinandresen/bitcoin-git/tree/discourageblocks (code reviews ...
9
votes
2answers
137 views

How do I report a bug in the Bitcoin client application?

I just installed the v0.4 client and have a bug to report... where can I do this? If you could also describe how to check if the bug has been reported already, that would be great too.
9
votes
2answers
2k views

What are the steps in building bitcoind on Mac OS X 10.6?

Following the instructions in build-osx.txt (which seem sadly out of date) leaves me without a file named libboost_system.a. Here is how I built boost: % cd boost_1_42_0 % ./bootstrap.sh % ./bjam ...
4
votes
2answers
701 views

Why am I getting this make error w/ 0.4.0rc1 on Ubuntu

Building 0.4.0rc1 in Ububtu via make -f makefile.unix returns the following errors/warnings: ui.cpp: In member function 'virtual void CMainFrame::OnIconize(wxIconizeEvent&)': ui.cpp:488:25 ...