From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17292 invoked by alias); 4 May 2011 20:58:46 -0000 Received: (qmail 17283 invoked by uid 22791); 4 May 2011 20:58:45 -0000 X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_BJ,TW_CX,TW_DC,TW_GX X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 04 May 2011 20:58:31 +0000 From: "mhp77 at gmx dot at" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/48876] New: ICE when initializing character variable with zero-length string X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mhp77 at gmx dot at X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Wed, 04 May 2011 20:58:00 -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 X-SW-Source: 2011-05/txt/msg00382.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48876 Summary: ICE when initializing character variable with zero-length string Product: gcc Version: 4.6.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned@gcc.gnu.org ReportedBy: mhp77@gmx.at The following Fortran program compiles without errors: program test character :: string = "string"( : 0 ) end program test On the other hand, compiling the semantically equivalent program program test character :: string = "string"( : - 1 ) end program test leads to an internal compiler error. Interestingly, if the ending point of the substring is less than -2 the internal compiler error turns into an "out of memory" error. $ gfortran-4.6 -v -c test.f90 Using built-in specs. COLLECT_GCC=gfortran-4.6 COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.6.1/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.0-2' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld --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 4.6.1 20110329 (prerelease) (Debian 4.6.0-2) COLLECT_GCC_OPTIONS='-v' '-c' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951 test.f90 -quiet -dumpbase test.f90 -mtune=generic -march=x86-64 -auxbase test -version -fintrinsic-modules-path /usr/lib/gcc/x86_64-linux-gnu/4.6.1/finclude -o /tmp/ccWeUXPn.s GNU Fortran (Debian 4.6.0-2) version 4.6.1 20110329 (prerelease) (x86_64-linux-gnu) compiled by GNU C version 4.6.1 20110329 (prerelease), GMP version 5.0.1, MPFR version 3.0.0-p8, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU Fortran (Debian 4.6.0-2) version 4.6.1 20110329 (prerelease) (x86_64-linux-gnu) compiled by GNU C version 4.6.1 20110329 (prerelease), GMP version 5.0.1, MPFR version 3.0.0-p8, MPC version 0.9 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 *** glibc detected *** /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951: malloc(): smallbin double linked list corrupted: 0x0000000001e98f50 *** ======= Backtrace: ========= /lib/libc.so.6(+0x71ad6)[0x2b666912bad6] /lib/libc.so.6(+0x753ed)[0x2b666912f3ed] /lib/libc.so.6(__libc_malloc+0x70)[0x2b6669130930] /lib/libc.so.6(+0x2f682)[0x2b66690e9682] /lib/libc.so.6(+0x2d8b5)[0x2b66690e78b5] /lib/libc.so.6(+0x2d1a0)[0x2b66690e71a0] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x7b07c1] /lib/libc.so.6(+0x321e0)[0x2b66690ec1e0] /lib/libc.so.6(memcpy+0x2eb)[0x2b6669139a3b] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(gfc_simplify_expr+0x213)[0x4e0273] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x4df07e] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(gfc_reduce_init_expr+0x78)[0x4df8f8] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(gfc_match_init_expr+0x5a)[0x4df95a] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(gfc_match_data_decl+0xde4)[0x4d28b4] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x51609a] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x51680a] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x517d35] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x5190e5] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x51a799] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(gfc_parse_file+0x3ff)[0x51b6df] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x554136] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951(toplev_main+0xd82)[0x7b2752] /lib/libc.so.6(__libc_start_main+0xfd)[0x2b66690d8c4d] /usr/lib/gcc/x86_64-linux-gnu/4.6.1/f951[0x4b5319] ======= Memory map: ======== ... f951: internal compiler error: Aborted Please submit a full bug report, with preprocessed source if appropriate. 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