http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49083
--- Comment #2 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-06-05 20:36:36 UTC --- Fixed at r174307. Now the provided test case properly errors with gcc trunk... howarth% gcc-fsf-4.7 hidden_bug.cc hidden_bug.cc: In function ‘int main()’: hidden_bug.cc:14:8: error: redeclaration of ‘char* I’ hidden_bug.cc:10:25: error: ‘const char** I’ previously declared here