Strange build error message

still Build sandboxing disabled due to nsjail error

8 hours analyzing Android.bp files and generating ninja file at out/soong/build.lineage_FP5.ninja

for sure this is not normal :

except at the beginning, RAM was full during all time
except at the beginning, CPU didn’t have much to do
except at the beginning, Disk activity was mostly system and home (sdc5) disk and swap (sdc3)
no more sources and build (sdb5)

a15 may be too hard for my lovely 30€ machine, i willl try a11 to check if it build…