trying to debug segfault, added verbosity to lexer header

Segmentation fault: 11

(gdb) backtrace
#0  0x00007fff8f4806b0 in strlen ()
#1  0x00007fff8f507a65 in __vfprintf ()
#2  0x00007fff8f504e16 in vsnprintf_l ()
#3  0x00007fff8f4ff3c4 in snprintf ()
#4  0x00000001000010d8 in Lexer::nextChar (this=0x7fff5fbffa78) at
lexer.hpp:104
#5  0x0000000100001989 in Lexer::next (this=0x7fff5fbffa78) at
lexer.hpp:182
#6  0x0000000100001fc5 in main (argc=2, argv=0x7fff5fbffaf0) at
lexer.cpp:22
(gdb) quit