Re: [Bug fortran/28118] ICE calling subroutine defined via explicit interface

[Paul Thomas <paulthomas2 at wanadoo dot fr>]

Harald,

> as you dealt with the above PR, could you please have
> a look into PR 28174?  Either there is something wrong
> with your fix, or there is an independent problem.
It turned out to be both.  I had forgotten that the character length 
structures can be shared; in this case, the temporary was sharing with 
the original variable, so that the substring reference wound up applying 
to both!  This is cured by obtaining a new character length structure 
and populating that.

As I said earlier, the above patch does not return the actual values 
because I did not write back the temporary.  With a small amount of 
juggling, the fix for components of derived type arrays works fine but 
it requires the fix applied to PR28118, for the same reason.

The patch to trans-expr.c works with constant substring expressions.  I 
need to do some more to generalise this to general expressions and then 
to go back to the original patch in trans-array.c to see whether one 
should be consumed in the other or what.

I anticipate submitting a patch in a few days.

Thanks for the prompt report and an interesting problem.

Paul