[Bug 721378] Re: g++ ICE (segfault in cc1plus)

Fri Jul 15 11:23:58 UTC 2011

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On 2011-07-15T10:49:42+00:00 Matthias Klose wrote:

Created attachment 24773
preprocessed source

[forwarded from http://launchpad.net/bugs/721378]

might related to PR48766, although I don't see the recursion in
fold_binary_loc(). seen with current 4.4, 4.5, 4.6 branches and trunk.

$ g++ -c testcase.ii 
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.

Program received signal SIGSEGV, Segmentation fault.
0x00000000008046dc in fold_binary_loc ()
(gdb) bt
#0  0x00000000008046dc in fold_binary_loc ()
#1  0x00000000008905e2 in gimplify_expr ()
#2  0x0000000000895269 in ?? ()
#3  0x000000000089067e in gimplify_expr ()
#4  0x000000000089f7a2 in ?? ()
#5  0x0000000000891188 in gimplify_expr ()
#6  0x00000000008a22f9 in ?? ()
#7  0x000000000088fd3e in gimplify_expr ()
#8  0x0000000000898367 in gimplify_stmt ()
#9  0x000000000089f41d in ?? ()
#10 0x00000000008916f0 in gimplify_expr ()
#11 0x00000000008961b3 in ?? ()
#12 0x000000000088fcd5 in gimplify_expr ()
#13 0x0000000000898367 in gimplify_stmt ()
#14 0x0000000000890b9e in gimplify_expr ()
#15 0x0000000000898367 in gimplify_stmt ()
#16 0x0000000000898d5c in ?? ()
#17 0x0000000000891414 in gimplify_expr ()
#18 0x0000000000898367 in gimplify_stmt ()
#19 0x00000000008908a9 in gimplify_expr ()
#20 0x0000000000898367 in gimplify_stmt ()
#21 0x0000000000898d5c in ?? ()
#22 0x0000000000891414 in gimplify_expr ()
#23 0x0000000000898367 in gimplify_stmt ()
#24 0x00000000008908a9 in gimplify_expr ()
#25 0x0000000000898367 in gimplify_stmt ()
[...]

bug submitter writes:

- if you comment out the ~Base destructor, the ICE goes away.

- The ICE also goes away if you significantly reduce the number of Child
members in the Container class.

Reply at: https://bugs.launchpad.net/gcc/+bug/721378/comments/3

** Changed in: gcc
       Status: Unknown => New

** Changed in: gcc
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/721378

Title:
  g++ ICE (segfault in cc1plus)

Status in The GNU Compiler Collection:
  New
Status in “gcc-4.5” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: gcc-4.5

  I have a testcase reduced to a single C++ file that causes an internal
  error in g++ for every version tested (4.x for x = 1,2,3,4 and 5). I
  can reproduce it on Ubuntu 10.04 and 10.10. I have not been able to
  find any workaround for this bug.

  > g++-4.5 -v testcase.cxx
  Using built-in specs.
  COLLECT_GCC=g++-4.5
  COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.5.1/lto-wrapper
  Target: x86_64-linux-gnu
  Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.5.1-7ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --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++/4.5 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --with-plugin-ld=ld.gold --enable-objc-gc --disable-werror --with-arch-32=i686 --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 4.5.1 (Ubuntu/Linaro 4.5.1-7ubuntu2) 
  COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
   /usr/lib/gcc/x86_64-linux-gnu/4.5.1/cc1plus -quiet -v -D_GNU_SOURCE testcase.cxx -D_FORTIFY_SOURCE=2 -quiet -dumpbase testcase.cxx -mtune=generic -march=x86-64 -auxbase testcase -version -fstack-protector -o /tmp/ccg5bLs2.s
  GNU C++ (Ubuntu/Linaro 4.5.1-7ubuntu2) version 4.5.1 (x86_64-linux-gnu)
  	compiled by GNU C version 4.5.1, GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2
  GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
  ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
  ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.5.1/../../../../x86_64-linux-gnu/include"
  #include "..." search starts here:
  #include <...> search starts here:
   /usr/include/c++/4.5
   /usr/include/c++/4.5/x86_64-linux-gnu
   /usr/include/c++/4.5/backward
   /usr/local/include
   /usr/lib/gcc/x86_64-linux-gnu/4.5.1/include
   /usr/lib/gcc/x86_64-linux-gnu/4.5.1/include-fixed
   /usr/include/x86_64-linux-gnu
   /usr/include
  End of search list.
  GNU C++ (Ubuntu/Linaro 4.5.1-7ubuntu2) version 4.5.1 (x86_64-linux-gnu)
  	compiled by GNU C version 4.5.1, GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2
  GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
  Compiler executable checksum: 50e33501336f77ceb788d88860a1807b
  g++-4.5: Internal error: Segmentation fault (program cc1plus)
  Please submit a full bug report.
  See <file:///usr/share/doc/gcc-4.5/README.Bugs> for instructions.

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