about external variable chainActive #9877

issue viennadd opened this issue on February 27, 2017

viennadd commented at 3:20 PM on February 27, 2017: none
our tool reported a NULL pointer dereference, but I don't sure the thing,

I am wondering under what situation that we can assure the extern CChain chainActive; in validation.h has more than one element? (doesn't need NULL checking after chainActive.Tip())

one of the reported locations: mining.cpp#L504
```
          while (chainActive.Tip()->GetBlockHash() == hashWatchedChain && IsRPCRunning())
```
TheBlueMatt commented at 8:42 PM on February 27, 2017: member

I assume this was being reported to you by some automated tool, which "our tool" was a reference to. Generally chainActive.Tip() is set after initialization has completed (either to a block or the genesis block).
laanwj added the label Questions and Help on Feb 28, 2017
laanwj commented at 11:34 AM on February 28, 2017: member

Looks like this question is answered, closing.
laanwj closed this on Feb 28, 2017
DrahtBot locked this on Sep 8, 2021

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