https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50535
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> --- Still in version 11. Both Intel ifort and NAG nagfor detect the issue. ifort -S gfbug73.f -w gfbug73.f(5): error #6736: This transformational intrinsic function is invalid in this context; statement functions cannot contain transformational intrinsic functions. [ALL] g(x)=all(l) -----------^ compilation aborted for gfbug73.f (code 1) [vitti f95]$nagfor -S gfbug73.f -w NAG Fortran Compiler Release 7.0(Yurakucho) Build 7042 Error: gfbug73.f, line 5: Reference to transformational intrinsic ALL in statement function [NAG Fortran Compiler error termination, 1 error]