Don't let .gdb_history file cause failures
I had a .gdb_history file in my testsuite directory in the build tree,
and this provoked a failure in gdbhistsize-history.exp. It seems
simple to prevent this file from causing a failure.
diff --git a/gdb/testsuite/gdb.base/gdbhistsize-history.exp b/gdb/testsuite/gdb.base/gdbhistsize-history.exp
index 59fd2d0..00c3ea4 100644
--- a/gdb/testsuite/gdb.base/gdbhistsize-history.exp
+++ b/gdb/testsuite/gdb.base/gdbhistsize-history.exp
@@ -35,6 +35,10 @@
unset -nocomplain env(GDBHISTFILE)
unset -nocomplain env(GDBHISTSIZE)
+ # Ensure we don't accidentally pick up a .gdb_history from the
+ # testsuite directory.
+ set env(GDBHISTFILE) [standard_output_file .gdb_history]
+
set env($env_var) $histsize
with_test_prefix "histsize=$histsize" {
