http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50144
--- Comment #1 from Török Edwin <edwintorok at gmail dot com> 2011-08-21 15:52:33 UTC --- And here is a stacktrace from a local GCC build so you have line numbers: $ valgrind --trace-children=yes /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/xgcc -B/home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc /tmp/x.cpp -E >/dev/null ==2671== Memcheck, a memory error detector ==2671== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==2671== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==2671== Command: /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/xgcc -B/home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc /tmp/x.cpp -E ==2671== ==2675== Memcheck, a memory error detector ==2675== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==2675== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==2675== Command: /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/cc1plus -E -quiet -iprefix /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/../lib/gcc/x86_64-linux-gnu/4.6.1/ -isystem /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/include -isystem /home/edwin/gcc-4.6-4.6.1/src/host-x86_64-linux-gnu/gcc/include-fixed -D_GNU_SOURCE /tmp/x.cpp -mtune=generic -march=x86-64 ==2675== ==2675== Invalid read of size 8 ==2675== at 0x11D71C9: search_line_sse2 (lex.c:394) ==2675== by 0x11D7361: _cpp_clean_line (lex.c:666) ==2675== by 0x11D7D37: _cpp_get_fresh_line (lex.c:1887) ==2675== by 0x11D94B1: _cpp_lex_direct (lex.c:1952) ==2675== by 0x11DA2F6: _cpp_lex_token (lex.c:1826) ==2675== by 0x11DC9F7: cpp_get_token (macro.c:1240) ==2675== by 0x11DCC8F: cpp_get_token_with_location (macro.c:1352) ==2675== by 0x6C87A4: preprocess_file (c-ppoutput.c:175) ==2675== by 0x6C6D2B: c_common_init (c-opts.c:1057) ==2675== by 0x5C7668: cxx_init (lex.c:254) ==2675== by 0xA3204C: toplev_main (toplev.c:1742) ==2675== by 0x3C7141EEAC: (below main) (libc-start.c:228) ==2675== Address 0x4cec1f0 is 7,232 bytes inside a block of size 7,238 alloc'd ==2675== at 0x4A07882: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==2675== by 0x120070C: xrealloc (xmalloc.c:179) ==2675== by 0x11CC03B: _cpp_convert_input (charset.c:1734) ==2675== by 0x11D4962: read_file (files.c:648) ==2675== by 0x11D535A: _cpp_stack_file (files.c:723) ==2675== by 0x11D6C35: cpp_read_main_file (init.c:570) ==2675== by 0x6C64EA: c_common_post_options (c-opts.c:1016) ==2675== by 0xA31B30: toplev_main (toplev.c:1283) ==2675== by 0x3C7141EEAC: (below main) (libc-start.c:228) ==2675== ==2675== Invalid read of size 8 ==2675== at 0x11D71B3: search_line_sse2 (lex.c:382) ==2675== by 0x11D7361: _cpp_clean_line (lex.c:666) ==2675== by 0x11D7D37: _cpp_get_fresh_line (lex.c:1887) ==2675== by 0x11D94B1: _cpp_lex_direct (lex.c:1952) ==2675== by 0x11DA2F6: _cpp_lex_token (lex.c:1826) ==2675== by 0x11DC9F7: cpp_get_token (macro.c:1240) ==2675== by 0x11DCC8F: cpp_get_token_with_location (macro.c:1352) ==2675== by 0x6C87A4: preprocess_file (c-ppoutput.c:175) ==2675== by 0x6C6D2B: c_common_init (c-opts.c:1057) ==2675== by 0x5C7668: cxx_init (lex.c:254) ==2675== by 0xA3204C: toplev_main (toplev.c:1742) ==2675== by 0x3C7141EEAC: (below main) (libc-start.c:228) ==2675== Address 0x4cec1f0 is 7,232 bytes inside a block of size 7,238 alloc'd ==2675== at 0x4A07882: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==2675== by 0x120070C: xrealloc (xmalloc.c:179) ==2675== by 0x11CC03B: _cpp_convert_input (charset.c:1734) ==2675== by 0x11D4962: read_file (files.c:648) ==2675== by 0x11D535A: _cpp_stack_file (files.c:723) ==2675== by 0x11D6C35: cpp_read_main_file (init.c:570) ==2675== by 0x6C64EA: c_common_post_options (c-opts.c:1016) ==2675== by 0xA31B30: toplev_main (toplev.c:1283) ==2675== by 0x3C7141EEAC: (below main) (libc-start.c:228)
