Why are the error messages different?

I have two programs:

#line 1 "DB::eval"
234asd

perl < tmp.pl
Bareword found where operator expected at DB::eval line 1, near "234asd"
    (Missing operator before asd?)
syntax error at DB::eval line 2, near "234asd
"
Execution of - aborted due to compilation errors.

      

        
        
        
      

    

and the second one:

$str =  <<CODE;
#line 1 "DB::eval"
234asd
CODE
eval $str;
print $@;

perl < tmp.pl
Bareword found where operator expected at DB::eval line 1, near "#line 1 "DB::eval"
234asd"
    (Missing operator before asd?)
syntax error at DB::eval line 2, near "#line 1 "DB::eval"
234asd

"

      

        
        
        
      

    

Why, in the second case, I got additional text in the error message #line 1 "DB::eval"

:? I don't expect this.

Also in the second case I am not expecting an extra newline. I am waiting:

234asd
"

      

        
        
        
      

    

Instead:

234asd

"