D-Programming-Language/phobos — pull request #2026 by tom-tan (2014-03-19 15:25:14+00:00)
Title: Mark std.stdio.fopen and popen as trusted

They use system functions `_wfopen`, `core.sys.posix.stdio.fopen`, or `core.stdc.stdio.fopen` but we can verify that they can be trusted.