https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85662
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-05
CC| |jakub at gcc dot gnu.org
Version|unknown |8.0
Target Milestone|--- |8.2
Summary|regression since 6: "error: |[8/9 Regression] "error:
|non-constant condition for |non-constant condition for
|static assertion" from |static assertion" from
|__builtin_offsetof in C++ |__builtin_offsetof in C++
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Weird, I can only reproduce it starting with r247495 and can't reproduce with
gcc 7.
Better testcase that doesn't really depend on the actual structure layout and
sizes:
struct S { unsigned long x[31]; };
struct T { bool b; S f; };
static_assert (__builtin_offsetof (T, f.x[31 - 1]) == __builtin_offsetof (T,
f.x[30]), "");
Using 30 instead of 31-1 makes it go away, and the problem is that something
creates or keeps around 8 as pointer constant.
