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Materialize PG::Tuple objects when freezing and undef PG::Tuple.new - #770
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Otherwise a race condition could happen, like so: ``` /home/runner/work/ruby-pg/ruby-pg/spec/pg/tuple_spec.rb:316: [BUG] Segmentation fault at 0x0000000000000028 ruby 3.1.7p261 (2025-03-26 revision 0a3704f218) [x86_64-linux] -- Control frame information ----------------------------------------------- c:0004 p:---- s:0014 e:000013 CFUNC :each c:0003 p:---- s:0011 e:000010 CFUNC :to_h c:0002 p:0004 s:0007 e:000006 BLOCK /home/runner/work/ruby-pg/ruby-pg/spec/pg/tuple_spec.rb:316 [FINISH] c:0001 p:---- s:0003 e:000002 (none) [FINISH] ```
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Otherwise a segfault could happen, like in the commit description and here: https://github.com/ged/ruby-pg/actions/runs/41831844839/job/126580820448#step:13:83
Materializing an empty
PG::Tuple.newfails with a segfault as well. Therefore thenewmethod is undefined.