chain.address_type_txes() fails when address type count = 0

[satwo]

When calling chain.address_type_txes() with a block range that has 0 transactions of the specified address type, the script hangs and eventually throws a "std::bad_alloc" error.

Example:
txes_protocol = chain.address_type_txes(511645, 511646, blocksci.address_type.nulldata)`

Error:
MemoryError: std::bad_alloc

I've also reproduced this behavior with address type of multisig, eg. block 170.

[hkalodner]

Huh interesting. I've never hit that before, but I can recreate it. If it's the same problem you're hitting, it looks a like a bug that occurs in the segmentChain method which address_type_txes depends on which occurs whenever the range of blocks contains fewer transactions than your machine has CPUs. I'm working on a fix now.

Incidentally in the just released BlockSci v0.5, chain.address_type_txes() has been replaced by chain.blocks.txes.including_output_of_type(blocksci.address_type.nulldata) which returns a blocksci.TxIterator object which is an iterator over the matching transactions and also allows vectorized operations.

[satwo]

Great, thanks for the quick fix!!

Look forward to checking out v0.5.