I can build the R interface with the instructions here: https://github.com/igraph/rigraph/blob/dev/CONTRIBUTING.md#making-more-involved-changes
@Gabor, have you ever managed to compile R/igraph with Address Sanitizer on macOS? Generally, one needs -fsanitize=address -fno-omit-frame-pointer
when compiling/linking and additionally the ASan libraries would need to be loaded early, which could be achieved by starting R as
DYLD_INSERT_LIBRARIES=/path/to/asan/lib R
However, the devtools package seems to launch additional R processes which don’t have this library loaded.