Some problems with a very heavy module procedure

[François-Xavier Coudert]

> Both the code you submitted and the error look very similar to the one in
> PR21877 <http://gcc.gnu.org/PR21877>, so I'd assume that you will want to take
> a closer look at that bug.

PR21877 had two bugs. The original one, which is the one experienced
by Philippe again, is indeed PR19546; PR21877 is kept open for the
second one only.

FX