[gfortran,patch] Fix Fortran/18827

[Feng Wang]

Ping!

Today I tested again on i686 with no regression and regenerated a new patch
attached here.

 --- Feng Wang <wf_cs@yahoo.com> µÄÕýÎÄ£º
> Hi, Paul
>   I tested on i686-linux today and found no regression. The sources patched
> is 
> the snapshot downloaded from gfortran.org on 20th, Dec.
>   Did  you patch entirely?
> 
> Feng Wang
> 
>  --- Paul Brook <paul@codesourcery.com> µÄÕýÎÄ£º
> > Not ok. This causes many regressions on i686-linux. For example:
> > 
> > FAIL: gfortran.dg/g77/20010519-1.f  -O  (test for excess errors)
> > Excess errors:
> > /home/paul/cases/gcc/gcc/testsuite/gfortran.dg/g77/20010519-1.f:711:
> internal
> > 
> > compiler error: in gfc_conv_label_variable, at fortran/trans-stmt.c:89
> > 
> > Lines 87-79 are as follows:
> > 
> > gfc_conv_label_variable (gfc_se * se, gfc_expr * expr)
> > {
> >   gcc_assert (expr->symtree->n.sym->attr.assign != 1);
> > 
> > Paul
> >  
> 

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