[RFA 28/42] Set list_in_scope later in DWARF reader

[Tom Tromey <tom@tromey.com>]

Currently the DWARF reader sets the list_in_scope member of the CU
when first starting to process symbols.  Future changes will make this
assert -- code will not be able to refer to these lists until after
start_symtab has been called.  This patch prepares for the problem by
arranging to initialize list_in_scope in dwarf2_start_symtab.

gdb/ChangeLog
2018-05-22  Tom Tromey  <tom@tromey.com>

	* dwarf2read.c (process_full_comp_unit): Do not set list_in_scope.
	(process_full_type_unit): Likewise.
	(dwarf2_start_symtab): Set list_in_scope.
---
 gdb/ChangeLog    | 6 ++++++
 gdb/dwarf2read.c | 6 ++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 3cc15ab645..f7cca01445 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -10281,8 +10281,6 @@ process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
   /* Clear the list here in case something was left over.  */
   cu->method_list.clear ();
 
-  cu->list_in_scope = &file_symbols;
-
   cu->language = pretend_language;
   cu->language_defn = language_def (cu->language);
 
@@ -10386,8 +10384,6 @@ process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
   /* Clear the list here in case something was left over.  */
   cu->method_list.clear ();
 
-  cu->list_in_scope = &file_symbols;
-
   cu->language = pretend_language;
   cu->language_defn = language_def (cu->language);
 
@@ -21138,6 +21134,8 @@ dwarf2_start_symtab (struct dwarf2_cu *cu,
     = start_symtab (cu->per_cu->dwarf2_per_objfile->objfile, name, comp_dir,
 		    low_pc, cu->language);
 
+  cu->list_in_scope = get_file_symbols ();
+
   record_debugformat ("DWARF 2");
   record_producer (cu->producer);
 
-- 
2.13.6