The IFort compiler 22.214.171.124, Win7, IA32 gives a correct message for the following code, but the line number reported would be more useful if it pertained to the line with the error.
[fortran]subroutine sub(x,n) integer m,n real x(n) real y(m) ! <
Thanks - I agree. This has been reported to the developers as DPD200174426.
Because of the way the compiler does the processing, it is difficult to point to the COMMON statement as a source of the error. But what we did do was reword the error message to make it clearer as to what to look for:
t.f90(2): error #6219: This variable, used in a specification expression, must be a dummy argument,
a COMMON block object, or an object accessible through host or use association [M]