[gfortran,patch] Fix Fortran/18827

[Feng Wang]

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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