[pushed] [gdb/testsuite] Fix section hole detection in gdb.tui/scroll-back.exp

[Tom de Vries <tdevries@suse.de>]

On openSUSE Leap 15.6, with test-case gdb.tui/scroll-back.exp I ran into:
...
(gdb) x /cx bar-1^M
0x40056f:       Cannot access memory at address 0x400571^M
(gdb) UNSUPPORTED: $exp: require no section hole between .text_1 and .text_2
...

When I wrote the command, I thought that I specified printing one byte in hex,
but actually both c and x are format modifiers, so the size defaults to 'w'.

I filed a PR (PR34740) about stricter checking of format letters.

Fix by using "/bx".

Tested on x86_64-linux.
---
 gdb/testsuite/gdb.tui/scroll-back.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.tui/scroll-back.exp b/gdb/testsuite/gdb.tui/scroll-back.exp
index 76eb66eafca..8db7a165852 100644
--- a/gdb/testsuite/gdb.tui/scroll-back.exp
+++ b/gdb/testsuite/gdb.tui/scroll-back.exp
@@ -51,7 +51,7 @@ set re_hole \
 	 {$hex:\s+Cannot access memory at address $hex}]
 
 set section_hole -1
-gdb_test_multiple "x /cx bar-1" "" {
+gdb_test_multiple "x /bx bar-1" "" {
     -re -wrap $re_no_hole {
 	set section_hole 0
     }

base-commit: 80b91cb32b083868945f8da8fdeb2c20b5c9f099
-- 
2.51.0