[gdb/testsuite] Fix timeout in gdb.threads/inf-thr-count.exp

With test-case gdb.threads/inf-thr-count.exp, check-readmore and
READMORE_SLEEP=1000 I run into:
...
(gdb) set variable spin = 0^M
(gdb) ^M
Thread 1 "inf-thr-count" hit Breakpoint 2, breakpt () at /data/vries/gdb/src/gdb/testsuite/gdb.threads/inf-thr-count.c:49^M
49      }^M
FAIL: gdb.threads/inf-thr-count.exp: set 'spin' flag to allow main thread to exit (timeout)
PASS: gdb.threads/inf-thr-count.exp: wait for main thread to stop
...

Fix this by using -no-prompt-anchor.

Tested on x86_64-linux.

diff --git a/gdb/testsuite/gdb.threads/inf-thr-count.exp b/gdb/testsuite/gdb.threads/inf-thr-count.exp
index d7a768740823747c07f76ef819f01b91548b38da..9f52655364a9c4f67190e968f44ca77ea99aeb51 100644 (file)
--- a/gdb/testsuite/gdb.threads/inf-thr-count.exp
+++ b/gdb/testsuite/gdb.threads/inf-thr-count.exp
@@ -163,7 +163,7 @@ gdb_test "with print thread-events on -- p \$_inferior_thread_count" \
 
 # Set a variable in the inferior, this will cause the second thread to
 # exit.
-gdb_test_no_output "set variable spin = 0" \
+gdb_test_no_output -no-prompt-anchor "set variable spin = 0" \
     "set 'spin' flag to allow main thread to exit"
 
 # When the second thread exits, the main thread joins with it, and