Am Freitag, 3. September 2021, 17:42:40 CEST schrieb Gerion Entrup: > Am Freitag, 3. September 2021, 11:12:45 CEST schrieb Tiago de Paula Peixoto: > > Am 03.09.21 um 00:18 schrieb Gerion Entrup: > > > My question: How can I debug this and find out, why it is invalid? Can I > > > do/print anything in Python? Should I use GDB? Where would be a good > > > place to set a breakpoint? > > > > > > I cannot print the faulty edge. It is fairly complicate to make an > > > minimal example. My whole code uses no remove_edge() or remove_vertex(). > > > I'm using graph_tool 2.43. > > > > What you should do is produce a minimal example that shows the > > problem... No debugger is going to replace this simple strategy. > > The function is not new. It has worked for some time now. I'm pretty sure, > that this exact graph produces the problem. > So to make a minimal example, it would help to understand the problem first.
I have found my error. The function `get_function_bbs` actually is a generator and thus leaving the out_edges() iterator intact. In the code which calls `get_function_bbs`, however, some additional edges are created for this exact node (`function`) which probably destroys the iterator. Storing the generator output in memory first fixes the problem. Best, Gerion
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