public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/66966] New: Missing diagnostic message for ill-formed program with anonymous enum
@ 2015-07-22 11:32 anders.granlund.0 at gmail dot com
  2015-07-22 11:42 ` [Bug c++/66966] " redi at gcc dot gnu.org
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: anders.granlund.0 at gmail dot com @ 2015-07-22 11:32 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66966

            Bug ID: 66966
           Summary: Missing diagnostic message for ill-formed program with
                    anonymous enum
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anders.granlund.0 at gmail dot com
  Target Milestone: ---

Consider the following program (prog.cc):

  enum {};
  int main() {}

This is ill-formed according to [dcl.dcl]/5 of the c++ standard:

  http://eel.is/c++draft/dcl.dcl#5

Compile the program with the following command line:

  gcc prog.cc -std=c++98 -pedantic-errors -w

Observe that no diagnostic message is emitted. At least one diagnostic message
is expected since the program is ill-formed.

The bug 54216 that has been fixed seems to be similar. The difference is that
I'm using -w and -pedantic-errors. 

Could the bug be caused by a general problem of some errors getting hidden by
the combination -w and -pedantic-errors? I suspect this since I get the
following error message if I remove -w:

  error: ISO C++ forbids empty anonymous enum

Output for gcc -v (the problem seems to be quite independent of this however):

Using built-in specs.
COLLECT_GCC=/usr/local/gcc-head/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/heads/gcc/gcc-source/configure
--prefix=/usr/local/gcc-head --enable-languages=c,c++ --enable-lto
--disable-multilib --without-ppl --without-cloog-ppl --enable-checking=release
--disable-nls
Thread model: posix
gcc version 6.0.0 20150721 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-std=c++98' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/cc1plus -quiet
-v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE prog.cc -quiet -dumpbase prog.cc
-mtune=generic -march=x86-64 -auxbase prog -std=c++98 -version -o
/tmp/ccHJNWUA.s
GNU C++98 (GCC) version 6.0.0 20150721 (experimental)
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 6.0.0 20150721 (experimental), GMP version
5.1.2, MPFR version 3.1.2, MPC version 1.0.1
warning: GMP header version 5.1.2 differs from library version 5.0.2.
warning: MPFR header version 3.1.2 differs from library version 3.1.0-p3.
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/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:

/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../include/c++/6.0.0

/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../include/c++/6.0.0/x86_64-unknown-linux-gnu

/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../include/c++/6.0.0/backward
 /usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/include
 /usr/local/include
 /usr/local/gcc-head/include
 /usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
GNU C++98 (GCC) version 6.0.0 20150721 (experimental)
(x86_64-unknown-linux-gnu)
        compiled by GNU C version 6.0.0 20150721 (experimental), GMP version
5.1.2, MPFR version 3.1.2, MPC version 1.0.1
warning: GMP header version 5.1.2 differs from library version 5.0.2.
warning: MPFR header version 3.1.2 differs from library version 3.1.0-p3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 498fb50b10eacf300a28f79d04f435a8
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-std=c++98' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 as -v --64 -o /tmp/ccpk87pk.o /tmp/ccHJNWUA.s
GNU assembler version 2.22 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.22
COMPILER_PATH=/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/:/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/:/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/:/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/:/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/
LIBRARY_PATH=/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/:/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib64/:/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-o' 'prog.exe' '-std=c++98' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/collect2
-plugin
/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/liblto_plugin.so
-plugin-opt=/usr/local/gcc-head/libexec/gcc/x86_64-unknown-linux-gnu/6.0.0/lto-wrapper
-plugin-opt=-fresolution=/tmp/cc7VqyW3.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o
prog.exe /usr/lib/x86_64-linux-gnu/crt1.o /usr/lib/x86_64-linux-gnu/crti.o
/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/crtbegin.o
-L/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0
-L/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../../../lib64
-L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu
-L/usr/lib/../lib64
-L/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/../../.. -rpath
/usr/local/gcc-head/lib64 -lpthread /tmp/ccpk87pk.o -lstdc++ -lm -lgcc_s -lgcc
-lc -lgcc_s -lgcc
/usr/local/gcc-head/lib/gcc/x86_64-unknown-linux-gnu/6.0.0/crtend.o
/usr/lib/x86_64-linux-gnu/crtn.o


^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2015-07-22 15:07 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-07-22 11:32 [Bug c++/66966] New: Missing diagnostic message for ill-formed program with anonymous enum anders.granlund.0 at gmail dot com
2015-07-22 11:42 ` [Bug c++/66966] " redi at gcc dot gnu.org
2015-07-22 11:44 ` redi at gcc dot gnu.org
2015-07-22 11:45 ` anders.granlund.0 at gmail dot com
2015-07-22 11:49 ` anders.granlund.0 at gmail dot com
2015-07-22 12:25 ` anders.granlund.0 at gmail dot com
2015-07-22 14:16 ` manu at gcc dot gnu.org
2015-07-22 14:43 ` anders.granlund.0 at gmail dot com
2015-07-22 15:07 ` manu at gcc dot gnu.org

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).