proc.c: assume rb_iseq_location_t::first_lineno is always a Fixnum

Do not check for the value of rb_iseq_constant_body::line_info_table as
it is no longer related. The checks seem to be the remains from the day
before the dedicated 'first_lineno' field was introduced. Remove them.

Note, rb_iseq_constant_body::line_info_table can be NULL only when the
iseq does not contain any instructions that originate from Ruby code,
for example, an iseq created with 'proc {}' under a non-default compile
options where trace instructions are disabled.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57118 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 9 insertions, 22 deletions

diff --git a/proc.c b/proc.c
index d72e1a9254..1cc36a083c 100644
--- a/proc.c
+++ b/proc.c
@@ -1076,12 +1076,8 @@ iseq_location(const rb_iseq_t *iseq)
     if (!iseq) return Qnil;
     rb_iseq_check(iseq);
     loc[0] = iseq->body->location.path;
-    if (iseq->body->line_info_table) {
-	loc[1] = rb_iseq_first_lineno(iseq);
-    }
-    else {
-	loc[1] = Qnil;
-    }
+    loc[1] = iseq->body->location.first_lineno;
+
     return rb_ary_new4(2, loc);
 }
 
@@ -1234,12 +1230,9 @@ proc_to_s_(VALUE self, const rb_proc_t *proc)
       case block_type_iseq:
 	{
 	    const rb_iseq_t *iseq = rb_iseq_check(block->as.captured.code.iseq);
-	    int first_lineno = 0;
-	    if (iseq->body->line_info_table) {
-		first_lineno = FIX2INT(rb_iseq_first_lineno(iseq));
-	    }
 	    str = rb_sprintf("#<%s:%p@%"PRIsVALUE":%d%s>", cname, (void *)self,
-			     iseq->body->location.path, first_lineno, is_lambda);
+			     iseq->body->location.path,
+			     FIX2INT(iseq->body->location.first_lineno), is_lambda);
 	}
 	break;
       case block_type_symbol:
diff --git a/thread.c b/thread.c
index 70a438c3b9..11f325b8a4 100644
--- a/thread.c
+++ b/thread.c
@@ -788,19 +788,13 @@ thread_initialize(VALUE thread, VALUE args)
     }
     GetThreadPtr(thread, th);
     if (th->first_args) {
-	VALUE proc = th->first_proc, line, loc;
-	VALUE file;
+	VALUE proc = th->first_proc, loc;
         if (!proc || !RTEST(loc = rb_proc_location(proc))) {
             rb_raise(rb_eThreadError, "already initialized thread");
         }
-	file = RARRAY_AREF(loc, 0);
-	if (NIL_P(line = RARRAY_AREF(loc, 1))) {
-	    rb_raise(rb_eThreadError,
-		     "already initialized thread - %"PRIsVALUE, file);
-	}
         rb_raise(rb_eThreadError,
 		 "already initialized thread - %"PRIsVALUE":%"PRIsVALUE,
-                 file, line);
+                 RARRAY_AREF(loc, 0), RARRAY_AREF(loc, 1));
     }
     return thread_create_core(thread, args, 0);
 }
diff --git a/vm_method.c b/vm_method.c
index 33e90cf9f1..8aea9b54cc 100644
--- a/vm_method.c
+++ b/vm_method.c
@@ -563,9 +563,9 @@ rb_method_entry_make(VALUE klass, ID mid, VALUE defined_class, rb_method_visibil
 	      default:
 		break;
 	    }
-	    if (iseq && !NIL_P(iseq->body->location.path)) {
-		int line = iseq->body->line_info_table ? FIX2INT(rb_iseq_first_lineno(iseq)) : 0;
-		rb_compile_warning(RSTRING_PTR(iseq->body->location.path), line,
+	    if (iseq) {
+		rb_compile_warning(RSTRING_PTR(iseq->body->location.path),
+				   FIX2INT(iseq->body->location.first_lineno),
 				   "previous definition of %"PRIsVALUE" was here",
 				   rb_id2str(old_def->original_id));
 	    }