Hi. I'm getting compiler warnings for subscripts out of range from kamada_kawai_spring_layout.hpp. I'm using boost_55_0, compiled with clang: Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn) Target: x86_64-apple-darwin13.2.0 Thread model: posix ../../../../../include/boost/graph/kamada_kawai_spring_layout.hpp:110:49: warning: array index 2 is past the end of the array (which contains 2 elements) [-Warray-bounds] double denom = mat[0][0] * (mat[1][1] * mat[2][2] - mat[2][1] * mat[1][2]) The offending code is: template <> struct linear_solver<3> { template <typename Vec> static Vec solve(double mat[2][2], Vec rhs) { double denom = mat[0][0] * (mat[1][1] * mat[2][2] - mat[2][1] * mat[1][2]) - mat[1][0] * (mat[0][1] * mat[2][2] - mat[2][1] * mat[0][2]) + mat[2][0] * (mat[0][1] * mat[1][2] - mat[1][1] * mat[0][2]); double x_num = rhs[0] * (mat[1][1] * mat[2][2] - mat[2][1] * mat[1][2]) - rhs[1] * (mat[0][1] * mat[2][2] - mat[2][1] * mat[0][2]) + rhs[2] * (mat[0][1] * mat[1][2] - mat[1][1] * mat[0][2]); double y_num = mat[0][0] * (rhs[1] * mat[2][2] - rhs[2] * mat[1][2]) - mat[1][0] * (rhs[0] * mat[2][2] - rhs[2] * mat[0][2]) + mat[2][0] * (rhs[0] * mat[1][2] - rhs[1] * mat[0][2]); double z_num = mat[0][0] * (mat[1][1] * rhs[2] - mat[2][1] * rhs[1] ) - mat[1][0] * (mat[0][1] * rhs[2] - mat[2][1] * rhs[0] ) + mat[2][0] * (mat[0][1] * rhs[1] - mat[1][1] * rhs[0] ); Vec result; result[0] = x_num / denom; result[1] = y_num / denom; result[2] = z_num / denom; return result; } }; Looks like it should be: static Vec solve(double mat[3][3], Vec rhs) ... No?