[Bug gdb/30961] New: Random "ERROR: Window too small." errors in testsuite

[Bug gdb/30961] New: Random "ERROR: Window too small." errors in testsuite

[simon.marchi at polymtl dot ca]

https://sourceware.org/bugzilla/show_bug.cgi?id=30961

            Bug ID: 30961
           Summary: Random "ERROR: Window too small." errors in testsuite
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: simon.marchi at polymtl dot ca
  Target Milestone: ---

Since a few weeks, I've been getting random "Window too small" errors in some
tests, in my CI.  It happens rarely, it appears completely random (not always
the same test).  For instance:

 663381 (gdb) PASS: gdb.base/checkpoint-ns.exp: break2 with many checkpoints
 663382 info checkpoints^M
 663383 * 0 Thread 0x7ffff7dd9740 (LWP 998419) (main process) at 0x0^M
 663384   1 process 998463 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663385   2 process 998469 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663386   3 process 998472 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663387   4 process 998473 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663388   5 process 998474 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663389   6 process 998477 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663390   7 process 998480 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gdb/testsuite/gdb.base/checkpoint.c,
line 49^        M
 663391   8 process 998486 at 0x5555555552d0, file
/home/jenkins/workspace/dev_review_binutils-gdb_linuxbuild/platform/deb12-amd64/target_board/unix/src/binutils-gdb/gd--Type
<RET> for more, q to quit, c to cont        inue without paging--ERROR: Window
too small.
 663392 UNRESOLVED: gdb.base/checkpoint-ns.exp: info checkpoints with at least
600 checkpoints

Note the unexpected pagination.  GDB is started with:

  -iex "set height 0" -iex "set width 0"

and these commands are done first thing after starting GDB:

  (gdb) set height 0
  (gdb) set width 0

I have no clue what causes pagination to randomly happen.

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