Here's the (not so useful) backtrace: Program received signal SIGSEGV, Segmentation fault. 0x0000000120111a2c in putchar () (gdb) bt #0 0x0000000120111a2c in putchar () #1 0x0000000120111dd0 in putchar () #2 0x00000001200c5374 in putchar () #3 0x00000001200c5228 in putchar () #4 0x00000001200c5020 in putchar () #5 0x00000001200c4eb4 in putchar () #6 0x000000012003bb44 in std::operator+<char, std::char_traits<char>, std::allocator<char> > () #7 0x000000012003c90c in std::operator+<char, std::char_traits<char>, std::allocator<char> > () #8 0x0000000120223954 in std::_Rb_tree_rebalance_for_erase () #9 0x000000012003f2b4 in std::operator+<char, std::char_traits<char>, std::allocator<char> > () Cannot access memory at address 0x20000e68e88 (gdb)
-- Steve Langasek postmodern programmer
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