pgsql: Fix use-after-free with multirange types in CREATE TYPE

Fix use-after-free with multirange types in CREATE TYPE

The code was freeing the name of the multirange type function stored in
the parse tree but it should not do that.  Event triggers could for
example look at such a corrupted parsed tree with a ddl_command_end
event.

Author: Alex Kozhemyakin, Sergey Shinderuk
Reviewed-by: Peter Eisentraut, Michael Paquier
Discussion: https://postgr.es/m/d5042d46-b9cd-6efb-219a-71ed0cf45bc8@postgrespro.ru
Backpatch-through: 14

Branch
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REL_14_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/922e15c47647af1b15af0a92742c8af69e83c823

Modified Files
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src/backend/commands/typecmds.c | 1 -
1 file changed, 1 deletion(-)