Fix use-after-move in compile/compile-cplus-types.c

Patch

  d82b3862f12 ("compile: Remove non-const reference parameters")

introduced a regression in compile/compile-cplus-types.c.  The new_scope
variable in compile_cplus_instance::enter_scope is used after it was
std::moved.  This patch fixes it by referring to the back of the vector
where it was moved instead.

gdb/ChangeLog:

	* compile/compile-cplus-types.c
	(compile_cplus_instance::enter_scope): Don't use new_scope after
	std::move.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 673d35b..419bffd 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2018-09-17  Simon Marchi  <simon.marchi@ericsson.com>
+
+       * compile/compile-cplus-types.c
+       (compile_cplus_instance::enter_scope): Don't use new_scope after
+       std::move.
+
 2018-09-17  Tom Tromey  <tom@tromey.com>
 
        * common/pathstuff.c (get_standard_cache_dir): Use

diff --git a/gdb/compile/compile-cplus-types.c b/gdb/compile/compile-cplus-types.c
index 75193d2..996fea5 100644 (file)
--- a/gdb/compile/compile-cplus-types.c
+++ b/gdb/compile/compile-cplus-types.c
@@ -261,7 +261,7 @@ compile_cplus_instance::enter_scope (compile_scope &&new_scope)
       if (debug_compile_cplus_scopes)
        {
          fprintf_unfiltered (gdb_stdlog, "entering new scope %s\n",
-                             host_address_to_string (&new_scope));
+                             host_address_to_string (&m_scopes.back ()));
        }
 
       /* Push the global namespace. */
@@ -270,7 +270,7 @@ compile_cplus_instance::enter_scope (compile_scope &&new_scope)
       /* Push all other namespaces.  Note that we do not push the last
         scope_component -- that's the actual type we are converting.  */
       std::for_each
-       (new_scope.begin (), new_scope.end () - 1,
+       (m_scopes.back ().begin (), m_scopes.back ().end () - 1,
         [this] (const scope_component &comp)
         {
          gdb_assert (TYPE_CODE (SYMBOL_TYPE (comp.bsymbol.symbol))