https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86274
--- Comment #19 from Martin Sebor <msebor at gcc dot gnu.org> --- Author: msebor Date: Sat Jul 14 21:32:10 2018 New Revision: 262661 URL: https://gcc.gnu.org/viewcvs?rev=262661&root=gcc&view=rev Log: PR tree-optimization/86274 - SEGFAULT when logging std::to_string(NAN) gcc/ChangeLog: PR tree-optimization/86274 * gimple-ssa-sprintf.c (fmtresult::type_max_digits): Verify precondition. (format_floating): Correct handling of infinities and NaNs. gcc/testsuite/ChangeLog: PR tree-optimization/86274 * gcc.dg/tree-ssa/builtin-sprintf-9.c: New test. * gcc.dg/tree-ssa/builtin-sprintf-warn-1.c: Adjust. * gcc.dg/tree-ssa/builtin-sprintf-warn-10.c: Same. * gcc.dg/tree-ssa/builtin-sprintf-warn-15.c: Same. * gcc.dg/tree-ssa/builtin-sprintf-warn-7.c: Same. * gcc.dg/tree-ssa/builtin-sprintf.c: Same. * gcc.dg/tree-ssa/pr83198.c: Same. Added: branches/gcc-8-branch/gcc/testsuite/gcc.dg/torture/builtin-sprintf.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-9.c Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/gimple-ssa-sprintf.c branches/gcc-8-branch/gcc/testsuite/ChangeLog branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-1.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-10.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-15.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-7.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf.c branches/gcc-8-branch/gcc/testsuite/gcc.dg/tree-ssa/pr83198.c