g-os_lib.adb (Add_To_Command): use explicit loop to move string into Command, an array conversion is illegal here.

	* g-os_lib.adb (Add_To_Command): use explicit loop to move string
	into Command, an array conversion is illegal here. Uncovered by
	ACATS B460005.

From-SVN: r47435

1 files changed, 7 insertions, 1 deletions

diff --git a/gcc/ada/g-os_lib.adb b/gcc/ada/g-os_lib.adb
index cc600789e1d..3c352366acb 100644
--- a/gcc/ada/g-os_lib.adb
+++ b/gcc/ada/g-os_lib.adb
@@ -1316,7 +1316,13 @@ package body GNAT.OS_Lib is
 
       begin
          Command_Last := Command_Last + S'Length;
-         Command (First .. Command_Last) := Chars (S);
+
+         --  Move characters one at a time, because Command has
+         --  aliased components.
+
+         for J in S'Range loop
+            Command (First + J - S'First) := S (J);
+         end loop;
 
          Command_Last := Command_Last + 1;
          Command (Command_Last) := ASCII.NUL;