https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92956
--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> --- Created attachment 47508 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47508&action=edit -fdump-tree-strlen dump of gcc/testsuite/gfortran.dg/lto/pr87689_*.f As requested, the output of: $ gfortran-trunk -O2 -flto -flto-partition=1to1 -fno-use-linker-plugin gfortran.dg/lto/pr87689_* -fdump-tree-strlen $ head -n 2000000000 pr87689_0.f.180t.strlen1 pr87689_1.f.180t.strlen1 > strlen.txt I think the following causes the confusion: character(kind=1)[1:1] & restrict c, … _7 = (*c_15(D))[1]{lb: 1 sz: 1}; 'c' is a string of length 1 but the lower bound is also 1, hence "c[1]" accesses the first element of the string. I wonder whether you case assumes that the lower bound is always 0? – On the other hand, this issue only appears with inlining (and the specified LTO options), w/o there is no warning.
