milkyway_1.46_x[31149]: segfault at 0 ip 00007f26d6f65052 sp 000000000080c278 error 6 in libclangAST.so.8[7f26d6d96000+2fb000]

Every MilkyWay@Home Separation task I run immediately encounters a segmentation fault and dumps a core. I'm running a Radeon RX Vega 10 on Gentoo Linux. I run numerous GPU tasks for other projects, but I do not have this problem with any of them. I'd very much like to participate, but I need more information to solve this problem. Here's my most recent result (there's not much to see here, sadly):

https://milkyway.cs.rpi.edu/milkyway/result.php?resultid=303606180

Considering the segfault is in libclangAST.so.8, could the problem possibly be with the Clang library I have installed, or perhaps its particular version (8.0.1)?