Subject: pgsql: Fix pg_strtof() to not crash on NULL endptr.

From: Tom Lane <[email-masked]>
Date: Sat, 01 Mar 2025 19:23:23 +0000

Fix pg_strtof() to not crash on NULL endptr.

We had managed not to notice this simple oversight because none
of our calls exercised the case --- until commit 8f427187d.
That led to pg_dump crashing on any platform that uses this code
(currently Cygwin and Mingw).

Even though there's no immediate bug in the back branches, backpatch,
because a non-POSIX-compliant strtof() substitute is trouble waiting
to happen for extensions or future back-patches.

Diagnosed-by: Alexander Lakhin <[email-masked]>
Author: Tom Lane <[email-masked]>
Discussion: https://postgr.es/m/[email-masked]
Backpatch-through: 13

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/00d61a08c5fadca869c66a988b722e543d8e7100

Modified Files
--------------
src/port/strtof.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)