MettleM0101Use after free
Reported by the compiler as an error or warning.
mettle explain M0101A heap pointer is dereferenced after free(p) on the same path. The memory may already be reused; reads are garbage and writes corrupt other data.
Fix: free last, or set the pointer aside until every use is done. This analysis is conservative: it only warns when the freed pointer and the use are provably the same allocation on the same path.