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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/95381] [11 Regression]: Bootstrap on m68k fails with
 ICE: in operator[], at vec.h:867
Date: Tue, 16 Jun 2020 22:44:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95381

--- Comment #6 from Jeffrey A. Law <law at redhat dot com> ---
That's an indication that something has tried to do an out of bounds read o=
n a
VEC object.  The call chain points back to the initial quick_grow of an
auto_vec from test_vector_cst_patterns -- which is wildly surprising.

In fact if it were that broken I would fully expect other configurations,
including x86_64 to be failing miserably.  We're not seeing that.  I would =
also
expect that we could see the failure with a cross compiler, but that seems =
to
be working fine as well.

There's a nonzero chance this is actually a bug in the bootstrap compiler,
particularly if it's happening in the stage1 build.=