Error in multiflip_mcmc_sweep when resuming nested block-model state

Bug reports:

I am running graph_tool on a Macbook Pro, M1 2020, MacOS Sonoma 14.6.1 (23G93) with python3.10. I used the latest graph-tool version (2.97) that I could get from anaconda. I also tried the minimal example on colab with the condacolab installer and it did not work either.

My script: graph_tool_mcmc_error.zip or at github

I run a loop of 'multiflip_mcmc_sweep(beta=1, niter=10)'. Python crashes after a few iterations with an error report (full report found in files as crash_report.txt). In the console, the error looks like:

Run  0
beta = 1
61473.01334720126
58558.51659790002
57420.96938744546
56706.67543636693
56450.95001718272
56177.190729325324
56036.757047925035
55802.05087890877
55801.36077732993
55702.53250451976
55599.25872665603

libc++abi: terminating due to uncaught exception of type std::length_error: vector

Process finished with exit code 134 (interrupted by signal 6: SIGABRT)