[gdb/testsuite] Fix gdb.tui/wrap-line.exp

PR testsuite/30458 reports the following FAIL:
...
PASS: gdb.tui/wrap-line.exp: width-auto-detected: cli: wrap
^CQuit
(gdb) WARNING: timeout in accept_gdb_output
Screen Dump (size 50 columns x 24 rows, cursor at column 6, row 3):
    0 Quit
    1 (gdb) 7890123456789012345678901234567890123456789
    2 W^CQuit
    3 (gdb)
  ...
FAIL: gdb.tui/wrap-line.exp: width-auto-detected: cli: prompt after wrap
...

The problem is that the regexp doesn't account for the ^C:
...
    gdb_assert { [Term::wait_for "^WQuit"] } "prompt after wrap"
...

The ^C occurs occasionally.  This is something we'd like to fix.  It's
reported as a readline problem here (
https://lists.gnu.org/archive/html/bug-readline/2023-06/msg00000.html ).

For now, fix this by updating the regexp, and likewise in another place in the
test-case where we use ^C.

Tested on x86_64-linux.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30458

1 files changed, 8 insertions, 2 deletions

diff --git a/gdb/testsuite/gdb.tui/wrap-line.exp b/gdb/testsuite/gdb.tui/wrap-line.exp
index 2f0e4a5..1aac6fa 100644
--- a/gdb/testsuite/gdb.tui/wrap-line.exp
+++ b/gdb/testsuite/gdb.tui/wrap-line.exp
@@ -25,6 +25,12 @@ set cols 50
 set lines 24
 set dims [list $lines $cols]
 
+# Sometimes we see ^C.  This is something we'd like to fix.  It's reported as
+# a readline problem here (
+# https://lists.gnu.org/archive/html/bug-readline/2023-06/msg00000.html ).
+# For now, ignore it.
+set re_control_c "(\\^C)?Quit"
+
 # Fill line, assuming we start after the gdb prompt.
 proc fill_line { width } {
     set res ""
@@ -47,7 +53,7 @@ proc fill_line { width } {
 proc test_wrap { wrap_width } {
     # Generate a prompt and parse it.
     send_gdb "\003"
-    gdb_assert { [Term::wait_for "(^|$::gdb_prompt )Quit"] } "start line"
+    gdb_assert { [Term::wait_for "(^|$::gdb_prompt )$::re_control_c"] } "start line"
 
     # Fill the line to just before wrapping.
     set str [fill_line $wrap_width]
@@ -64,7 +70,7 @@ proc test_wrap { wrap_width } {
 
     # Generate a prompt and parse it.
     send_gdb "\003"
-    gdb_assert { [Term::wait_for "^WQuit"] } "prompt after wrap"
+    gdb_assert { [Term::wait_for "^W$::re_control_c"] } "prompt after wrap"
 }
 
 # Test wrapping in both CLI and TUI.