https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66714
--- Comment #7 from vries at gcc dot gnu.org --- Created attachment 35893 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35893&action=edit Resulting trace. The from that cannot be found: ... decl_value_expr_lookup could not find mapping for from 0x7fb79849d870 in function main._omp_fn.46 from: fdata.5 ... is indeed inserted at some point (though in a different function): ... decl_value_expr_insert from 0x7fb79849d870 to 0x7fb798539cf8 in function main from: fdata.5 to: *.omp_data_i->fdata.5 ...