Implement, for the R glue only, reentrant variants of the IGRAPH_FINALLY* API: - Declare a stack local to the function with a new `IGRAPH_LOCAL_FINALLY_STACK` macro - IGRAPH_LOCAL_* variants of the API that operate on the local stack - Rewrite all functions in `interface_extra.c` to use the new API - Adapt Stimulus to emit the new API, run code generation
Implement, for the R glue only, reentrant variants of the IGRAPH_FINALLY* API:
IGRAPH_LOCAL_FINALLY_STACKmacrointerface_extra.cto use the new API