https://issues.dlang.org/show_bug.cgi?id=24254
--- Comment #6 from Jure Pečar <jurij.pe...@embl.de> --- I'll try to wade through this cpuid detection logic in an attempt to spot something. How would I narrow down the approximate location in the code where crash happens? FYI, Sambamba (and LDC) works fine on zen4 cpus such as Genoa and Genoa-X. /proc/cpuinfo reports identical cpuid level and flags for all three. Only difference for zen4c (Bergamo) should be smaller cache. Does that help us narrowing down the issue? --