This file is indexed.

/usr/src/gcc-4.7/debian/libgfortran3.symbols.64 is in gcc-4.7-source 4.7.3-12ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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 _gfortran_clz128@GFORTRAN_1.2 4.4.0
 _gfortran_ctz128@GFORTRAN_1.2 4.4.0