Bug details: ============ GCC 2.96 20000731 fails for the following C++ code. It is a regression from GCC 2.95.x, and it doesn't fail for FSF GCC 3.0 release. System and GCC RPM information =============================== $ cat /etc/issue Red Hat Linux release 7.1 (Seawolf) Kernel 2.4.3-12 on an i686 [ All packages up-to-date as of 2001-07-12 using up2date ] $ rpm -qa|grep gcc gcc-objc-2.96-85 gcc-2.96-85 gcc-g77-2.96-85 gcc-c++-2.96-85 gcc-chill-2.96-85 gcc-java-2.96-85 $ rpm -qa|grep libstdc++ libstdc++-2.96-85 libstdc++-devel-2.96-85 Source ====== $ cat cxx-parse-bug.cc struct Foo { public: typedef void* (*copier_fn)(void const*); void foo() const; void bar(char const*, void const*) const; private: struct Bar { char const* key; void const* item; }; }; void Foo::foo() const { Bar* cp = 0; // doesn't matter what it points to. copier_fn copyfn = 0; // Likewise. bar(cp->key, cp->item); // Works as expected. bar(cp->key, (copyfn) ? (*copyfn)(cp) : 0); // Likewise. bar(cp->key, (copyfn) ? (*copyfn)(0) : 0); // Likewise. bar(cp->key, (copyfn) ? (*copyfn)(0) : cp->item); // Doesn't work. bar(cp->key, (copyfn) ? (*copyfn)(cp) : cp->item); // Likewise. } Compiler invocation and error output ==================================== $ gcc -c -v cxx-parse-bug.cc Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-85) /usr/lib/gcc-lib/i386-redhat-linux/2.96/cpp0 -lang-c++ -D__GNUG__=2 -D__EXCEPTIONS -v -D__GNUC__=2 -D__GNUC_MINOR__=96 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem(posix) -D__NO_INLINE__ -Acpu(i386) -Amachine(i386) -Di386 -D__i386 -D__i386__ -D__tune_i386__ cxx-parse-bug.cc /tmp/cc3MbEz4.ii GNU CPP version 2.96 20000731 (Red Hat Linux 7.1 2.96-85) (cpplib) (i386 Linux/ELF) ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/usr/i386-redhat-linux/include" #include "..." search starts here: #include <...> search starts here: /usr/include/g++-3 /usr/lib/gcc-lib/i386-redhat-linux/2.96/include /usr/include End of search list. /usr/lib/gcc-lib/i386-redhat-linux/2.96/cc1plus /tmp/cc3MbEz4.ii -quiet -dumpbase cxx-parse-bug.cc -version -o /tmp/ccebb390.s GNU C++ version 2.96 20000731 (Red Hat Linux 7.1 2.96-85) (i386-redhat-linux) compiled by GNU C version 2.96 20000731 (Red Hat Linux 7.1 2.96-85). cxx-parse-bug.cc: In method `void Foo::foo () const': cxx-parse-bug.cc:28: could not convert `cp->Foo::Bar::item' to `void *' cxx-parse-bug.cc:29: could not convert `cp->Foo::Bar::item' to `void *'
Patch is in my tree, will be fixed in gcc-c++-2.96-95.
Fix confirmed in gcc-3.3.2-1.
gcc-2.96 is too old. Its release cycle was finished long ago. Also Jakub wrote about fixing it in gcc-2.96-95. I can confirm that it was fixed in redhat gcc-3.2 branch too. So I am closing the case. If it is still important, we could reopen it.