[Bug fortran/67429] [5/6 Regression] Missing part of error messages.

["dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67429

--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
(In reply to Manuel López-Ibáñez  from comment #10)

> > Error: Expecting END BLOCK statement at (1)
> > (null):0: confused by earlier errors, bailing out
>
>
> Even if *I* cannot reproduce this, such an error should be easy to debug:
> Just put a break in diagnostic_report_diagnostic on the line that gives
> this message and go up to find out what triggered this code to run.
> My guess is that you are somehow triggering an ICE while reporting an ICE.
> It would be interesting to understand where that strange location comes
> from (I guess it is UNKNOWN_LOCATION?). And also to harden that code to not
> try to print a null s.file pointer!

Sorry for the confusion I sometime get this kind of error instead of the usual
ICE when using compilers configured with '--enable-checking=release'.
>From gcc-bugs-return-496152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 02 09:04:31 2015
Return-Path: <gcc-bugs-return-496152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 35518 invoked by alias); 2 Sep 2015 09:04:31 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 35471 invoked by uid 48); 2 Sep 2015 09:04:27 -0000
From: "xuejuncao at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/67433] ?: expression returns unexpected value when condition is a bool variable which memory is not true/false
Date: Wed, 02 Sep 2015 09:04:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 6.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: xuejuncao at gmail dot com
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: INVALID
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-67433-4-VbD8ilbHXY@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-67433-4@http.gcc.gnu.org/bugzilla/>
References: <bug-67433-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-09/txt/msg00130.txt.bz2
Content-length: 693

https://gcc.gnu.org/bugzilla/show_bug.cgi?idg433

--- Comment #8 from xuejuncao <xuejuncao at gmail dot com> ---
thanks, i get the below result with -fsanitize=undefined

boolmagic.c:12:16: runtime error: load of value 255, which is not a valid value
for type '_Bool'
boolmagic.c:13:15: runtime error: load of value 255, which is not a valid value
for type '_Bool'
boolmagic.c:14:15: runtime error: load of value 255, which is not a valid value
for type '_Bool'
b = 1, i = 1, j = 1

but, can i say the "-fsanitize=undefined" will _corrects_ the undefined
behaviour?

or replace the code by if/else, which works fine (lucky?)

    int i; // = (u.b ? 1 : 0);
    if (u.b) i = 1; else i = 0;