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[PATCH v2 1/2] btrace: fix output of "set record btrace"


Instead of giving a message that "set record btrace" needs a sub-command,
GDB crashed.  Fix it.  A regression test comes with the next patch.

2018-03-05  Markus Metzger  <markus.t.metzger@intel.com>

gdb/
	* record-btrace.c (cmd_set_record_btrace): Print sub-commands.
---
 gdb/record-btrace.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 48eda54..905f0c4 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -2953,7 +2953,10 @@ cmd_record_btrace_start (const char *args, int from_tty)
 static void
 cmd_set_record_btrace (const char *args, int from_tty)
 {
-  cmd_show_list (set_record_btrace_cmdlist, from_tty, "");
+  printf_unfiltered (_("\"set record btrace\" must be followed "
+		       "by an apporpriate subcommand.\n"));
+  help_list (set_record_btrace_cmdlist, "set record btrace ",
+	     all_commands, gdb_stdout);
 }
 
 /* The "show record btrace" command.  */
-- 
1.8.3.1


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