https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95695
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
And it's not related to LTO, it comes from a pre-processor. So we somehow screw
locations with -E and w/o -E option:
$ g++ -g -O2 demo.C && readelf --wide --debug-dump=info a.out > 1
$ g++ -g -O2 demo.C --save-temps && readelf --wide --debug-dump=info a.out > 2
$ diff -u 1 2 | head
--- 1 2020-06-16 10:59:52.263070583 +0200
+++ 2 2020-06-16 11:00:01.195019658 +0200
@@ -736,7 +736,7 @@
<541> DW_AT_name : (indirect string, offset: 0x8f1): size_t
<545> DW_AT_decl_file : 8
<546> DW_AT_decl_line : 2355
- <548> DW_AT_decl_column : 26
+ <548> DW_AT_decl_column : 29
<549> DW_AT_type : <0xf19>
<2><54d>: Abbrev Number: 23 (DW_TAG_namespace)
