Because I am doing a lot of numerical code in Fortran using the Intel compiler on Windows for production and GCC/GNU Fortran for prototyping on Linux I was a bi

Because I am doing a lot of numerical code in Fortran using the Intel compiler on Windows for production and GCC/GNU Fortran for prototyping on Linux I was a bit scared by the title. This is a problem with the equality comparison with doubles, something I try to avoid as much as possible, as this was the first thing I learnt to do 25 years ago... never compare double for equality. Anyway, the bug report is linking to a very nice research paper[0]: "The pitfalls of verifying floating-point computations", which even so very technical is a good read on the subject. [0]: https://hal.archives-ouvertes.fr/hal-00128124 https://hal.archives-ouvertes.fr/hal-00128124