public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "guez at lmd dot ens.fr" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/98433] New: double free detected in tcache 2, after merge of structures Date: Wed, 23 Dec 2020 22:18:36 +0000 [thread overview] Message-ID: <bug-98433-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98433 Bug ID: 98433 Summary: double free detected in tcache 2, after merge of structures Product: gcc Version: 10.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: guez at lmd dot ens.fr Target Milestone: --- This is the output of `gcc -v` on my machine: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper OFFLOAD_TARGET_NAMES=nvptx-none:hsa OFFLOAD_TARGET_DEFAULT=1 Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-17ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-HskZEa/gcc-9-9.3.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04) Here is a test program for the bug: $ cat test_bug_merge.f90 module bug_merge_m implicit none contains subroutine bug_merge type t real, allocatable:: v(:) end type t type(t) x1, x2, x3 allocate(x1%v(1)) x1%v = 1. allocate(x2%v(1)) x2%v = 2. x3 = merge(x1, x2, .false.) print *, "x3%v = ", x3%v end subroutine bug_merge end module bug_merge_m program test_bug_merge use bug_merge_m, only: bug_merge implicit none call bug_merge end program test_bug_merge And here is the result of compilation and execution: $ gfortran test_bug_merge.f90 $ a.out x3%v = 2.00000000 free(): double free detected in tcache 2 Program received signal SIGABRT: Process abort signal. Backtrace for this error: #0 0x146659050d3a #1 0x14665904fed5 #2 0x146658e7e20f #3 0x146658e7e18b #4 0x146658e5d858 #5 0x146658ec83ed #6 0x146658ed047b #7 0x146658ed20ec #8 0x55a871b8756c #9 0x55a871b8759c #10 0x55a871b875d5 #11 0x146658e5f0b2 #12 0x55a871b8711d #13 0xffffffffffffffff Aborted (core dumped) I think there is nothing wrong in the program. x1 and x2 are well defined. The error disappears if I replace the merge line with a simple x3 = x2. The error also disappears if I inline the content of the subroutine in the main program unit. Also, the program works with the Intel compiler.
next reply other threads:[~2020-12-23 22:18 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-12-23 22:18 guez at lmd dot ens.fr [this message] 2020-12-23 22:43 ` [Bug fortran/98433] " kargl at gcc dot gnu.org 2020-12-23 23:29 ` guez at lmd dot ens.fr 2020-12-24 0:52 ` sgk at troutmask dot apl.washington.edu 2020-12-24 7:55 ` guez at lmd dot ens.fr 2020-12-24 12:01 ` anlauf at gcc dot gnu.org 2020-12-24 19:31 ` kargl at gcc dot gnu.org 2020-12-24 23:03 ` guez at lmd dot ens.fr 2023-07-23 19:12 ` anlauf at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-98433-4@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).