MUSIC segmentation fault when nodes are created in specific order

[JanVogelsang]

The music-cont-proxy test (#3678 ) creates nodes in the following order in test_cont_proxy_sender.py:

mcoproxy = nest.Create("music_cont_out_proxy")

n1 = nest.Create("iaf_cond_exp", params={"I_e": 300.0})
n2 = nest.Create("iaf_cond_exp", params={"I_e": 600.0})

Changing this as follows produces a segmentation fault when executing the test script ( mpiexec -np 3 music test_cont_proxy.music):

n1 = nest.Create("iaf_cond_exp", params={"I_e": 300.0})
n2 = nest.Create("iaf_cond_exp", params={"I_e": 600.0})

mcoproxy = nest.Create("music_cont_out_proxy")

[heplesser]

@JanVogelsang Could you try what happens if, in the working variant, you create some node, e.g., a parrot neuron, before creating the music output proxy? I wonder if it might need to be node 1?

[med-ayssar]

@JanVogelsang could please post the stack trace of the seg fault.

[med-ayssar]

Could not reproduce with the current master.