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Description of problem:
Bug 1473411 - gdb leaks ignored SIGPIPE to child process - fix has caused a regression when one tried to LD_PRELOAD=/lib64/libSegFault.so for GDB itself.
While it IMO does not make too much sense to run it for GDB it is common for people to incorrectly LD_PRELOAD libraries already to GDB despite they want to preload them for the program being debugged (and they should use -ex 'set env LD_PRELOAD=/lib64/libSegFault.so' instead). So I believe the regression can happen in practice.

Version-Release number of selected component (if applicable):
PASS: RHEL-7.4 or gdb-7.6.1-106.el7
FAIL: gdb-7.6.1-107.el7

How reproducible:
Always.

Steps to Reproduce:
LD_PRELOAD=/lib64/libSegFault.so gdb

Actual results:
*** Segmentation fault
Register dump:
...
which backtraced gives:
#0  0x0000000000000000 in ?? ()
#1  0x00000000006a1c94 in internal_vproblem ()
#2  0x00000000006a1ea9 in internal_verror ()
#3  0x00000000006a1f4f in internal_error ()
#4  0x000000000060ea54 in save_original_signals_state ()
#5  0x00000000005dde8f in captured_main ()
#6  0x00000000005dc1ca in catch_errors ()
#7  0x00000000005df2e4 in gdb_main ()
#8  0x00000000004579ae in main ()

Expected results:
(gdb) _

Additional info:

[PATCH] Fix regression: cannot start with LD_PRELOAD=libSegFault.so (PR gdb/18653#c7)
https://sourceware.org/ml/gdb-patches/2017-12/msg00365.html
From: Pedro Alves <palves at redhat dot com>

Reproduced against gdb-7.6.1-107.el7 and verified against gdb-7.6.1-110.el7.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0701