George Joseph ecb3c3d8e5 func_strings.c: Prevent SEGV in HASH single-argument mode. ...

When in single-argument mode (very rarely used), a malformation of a column
name (also very rare) could cause a NULL to be returned when retrieving the
channel variable for that column.  Passing that to strncat causes a SEGV.  We
now check for the NULL and print a warning message.

Resolves: #1101
(cherry picked from commit 6574f6532d)

2025-03-20 18:34:07 +00:00

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