https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82155
--- Comment #8 from pmderodat at gcc dot gnu.org --- Author: pmderodat Date: Wed Nov 15 11:54:11 2017 New Revision: 254761 URL: https://gcc.gnu.org/viewcvs?rev=254761&root=gcc&view=rev Log: [PATCH] [PR82155] Fix crash in dwarf2out_abstract_function Backport from mainline (r253147): This patch is an attempt to fix the crash reported in PR82155. When generating a C++ class method for a class that is itself nested in a class method, dwarf2out_early_global_decl currently leaves the existing context DIE as it is if it already exists. However, it is possible that this call happens at a point where this context DIE is just a declaration that is itself not located in its own context. From there, if dwarf2out_early_global_decl is not called on any of the FUNCTION_DECL in the context chain, DIEs will be left badly scoped and some (such as the nested method) will be removed by the type pruning machinery. As a consequence, dwarf2out_abstract_function will will crash when called on the corresponding DECL because it asserts that the DECL has a DIE. This patch fixes this crash making dwarf2out_early_global_decl process context DIEs the same way we process abstract origins for FUNCTION_DECL: if the corresponding DIE exists but is only a declaration, call dwarf2out_decl anyway on it so that it is turned into a more complete DIE and so that it is relocated in the proper context. Bootstrapped and regtested on x86_64-linux. gcc/ PR debug/82155 * dwarf2out.c (dwarf2out_early_global_decl): Call dwarf2out_decl on the FUNCTION_DECL function context if it has a DIE that is a declaration. gcc/testsuite/ * g++.dg/pr82155.C: New testcase. Added: branches/gcc-7-branch/gcc/testsuite/g++.dg/pr82155.C Modified: branches/gcc-7-branch/gcc/ChangeLog branches/gcc-7-branch/gcc/dwarf2out.c branches/gcc-7-branch/gcc/testsuite/ChangeLog
