bug#46212: ci.guix.gnu.org narinfos with excessive NarSize

[Mathieu Othacehe]

Hey,

> The bug here is likely due to 32-bit signed integer wrapping.  That can
> only happen in C code, so to me possible culprits would be
> guile-simple-zmq or the layer above it (if there’s a binary protocol
> involved) or the postgresql interface.  Only a vague intuition, though.

Hmm, looks like you're right! There's a memory corruption in the
remote-server process that's really hard to reproduce. I suspect the ZMQ
library or its Guile bindings.

I'm trying to valgrind the process to identify the issue, without much
success for now.

Thanks,

Mathieu