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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/29032] New: [gdb][test-case failure, taskset] FAIL:
 gdb.base/eof-exit.exp: with non-dump terminal: close GDB with eof (timeout)
Date: Wed, 06 Apr 2022 11:36:25 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29032

            Bug ID: 29032
           Summary: [gdb][test-case failure, taskset] FAIL:
                    gdb.base/eof-exit.exp: with non-dump terminal: close
                    GDB with eof (timeout)
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

[ Note: not with system readline. ]

When running test-case gdb.base/eof-exit.exp, I get:
...
Running /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base/eof-exit.=
exp
...

                =3D=3D=3D gdb Summary =3D=3D=3D

# of expected passes            2
# of known failures             1
...

But when using taskset -c 0:
...
FAIL: gdb.base/eof-exit.exp: with non-dump terminal: close GDB with eof
(timeout)
FAIL: gdb.base/eof-exit.exp: with non-dump terminal: with bracketed-paste-m=
ode
on: close GDB with eof (timeout)
...

First one in more detail:
...
(gdb) dir^M
Reinitialize source path to empty? (y or n) y^M
Source directories searched: $cdir:$cwd^M
(gdb) dir /home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base^M
Source directories searched:
/home/vries/gdb_versions/devel/src/gdb/testsuite/gdb.base:$cdir:$cwd^M
(gdb) ^M
(gdb) FAIL: gdb.base/eof-exit.exp: default: close GDB with eof (timeout)
...

The observed behaviour matches with ^D getting dropped.

Indeed, a retry at the point of the timeout fixes the fail:
...
diff --git a/gdb/testsuite/gdb.base/eof-exit.exp
b/gdb/testsuite/gdb.base/eof-exit.exp
index 2d9530ccebe..0b310ee4b0b 100644
--- a/gdb/testsuite/gdb.base/eof-exit.exp
+++ b/gdb/testsuite/gdb.base/eof-exit.exp
@@ -55,6 +55,10 @@ proc run_test {} {
        eof {
            fail "$gdb_test_name (missed the prompt)"
        }
+       timeout {
+           send_gdb "\004"
+           exp_continue
+       }
     }
 }

...

So, is ^D allowed to get dropped?

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