https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66535
Bug ID: 66535
Summary: segfault in gen_subprogram_die after debug-early merge
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: ebotcazou at gcc dot gnu.org
CC: aldyh at gcc dot gnu.org
Target Milestone: ---
Created attachment 35776
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35776&action=edit
Testcase to be gnatchop'ed
The debug-early merge has introduced a crash on the attached Ada testcase:
eric@polaris:~/build/gcc/native> gcc/xgcc -Bgcc -S debug4.adb -g
raised STORAGE_ERROR : stack overflow or erroneous memory access
Program received signal SIGSEGV, Segmentation fault.
0x0000000000b3685c in gen_subprogram_die (decl=0x7ffff53928c0, context_die=0x0)
at /home/eric/gnat/gnat-head/src/gcc/dwarf2out.c:18793
18793 || old_die->die_parent->die_tag == DW_TAG_module
old_die->die_parent is NULL.
The testcase can be added as-is to the gnat.dg/ testsuite:
gnat.dg/debug4.adb
gnat.dg/debug4_pkg.adb
gnat.dg/debug4_pkg.ads
