From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29326 invoked by alias); 25 Jun 2014 14:59:09 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 29275 invoked by uid 48); 25 Jun 2014 14:59:02 -0000 From: "bspencer at blackberry dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/61611] New: Incorrect exception rethrown from a function-try-catch block when a nested try-catch executes Date: Wed, 25 Jun 2014 14:59:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 4.8.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: bspencer at blackberry dot com X-Bugzilla-Status: UNCONFIRMED 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: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: 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: 2014-06/txt/msg02004.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61611 Bug ID: 61611 Summary: Incorrect exception rethrown from a function-try-catch block when a nested try-catch executes Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: bspencer at blackberry dot com Created attachment 33006 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33006&action=edit Test program demonstrating the issue In a try-catch (catch) block nested within, but separate from, a function-try-catch (catch) block, gcc 4.7.2 for Linux (Debian) and gcc 4.8 for Linux are both incorrectly re-throwing the exception caught inside the nested catch block as that nested catch block exits. Attached is a program that shows the error when compiled with -DFUNCTION_TRY The program prints "PASS" when the correct exception propagates and and "FAIL" when the incorrect exception propagates. Note that this does not appear to be the behaviour of 15.3/15: "The currently handled exception is rethrown if control reaches the end of a handler of the function-try-block of a constructor or destructor." because the control is not reaching the end of such a handler. Thus, this report differs from Bug #45481. Perhaps _all_ catch blocks (including nested catch blocks) in a constructor function try-catch are rethrowing when control reaches the end of them instead of only the catch blocks of the actual constructor function try-catch structure. $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.7.2-5' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --with-arch-32=i586 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.7.2 (Debian 4.7.2-5) $ g++ -Wall -o test test.cc $ ./test main() starts Caught out_of_range: out_of_range Caught length_error: length_error Re-throw original ex TOP Caught out_of_range: out_of_range PASS main() stops $ g++ -Wall -o test test.cc -DFUNCTION_TRY $ ./test main() starts Caught out_of_range: out_of_range Caught length_error: length_error TOP Caught length_error: length_error FAIL main() stops The attched program passes with clang++ (clang-503.0.40) with or without -DFUNCTION_TRY. Apologies for the non-preprocessed test file, but it does use only standard headers.