Stack looping, SIGSEGVs in Item_hybrid_func::type_handler and Item::check_cols on SELECT when using a function

CREATE FUNCTION f() RETURNS ROW TYPE OF t RETURN 1;

CREATE TABLE t (c INT KEY,c2 INT,UNIQUE (c2));

SELECT ROW(COALESCE(f()),1)=ROW(1,1) AS eq;

Core was generated by `/test/MD060625-mariadb-12.0.1-linux-x86_64-opt/bin/mariadbd --no-defaults --max'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x0000561e49a8e084 in Item::check_cols (this=<optimized out>, c=1)at /test/12.0_opt/sql/item.cc:1028

[Current thread is 1 (LWP 527618)]

(gdb) bt

#0  0x0000561e49a8e084 in Item::check_cols (this=<optimized out>, c=1)at /test/12.0_opt/sql/item.cc:1028

#1  0x0000561e49a6a62f in cmp_row_type (item1=item1@entry=0x7fc82c018998, item2=0x7fc82c018bd8) at /test/12.0_opt/sql/item_cmpfunc.cc:59

#2  0x0000561e49a6a706 in cmp_row_type (item1=item1@entry=0x7fc82c018998, item2=0x7fc82c018bd8) at /test/12.0_opt/sql/item_cmpfunc.cc:65

#3  0x0000561e49a6a706 in cmp_row_type (item1=item1@entry=0x7fc82c018998, item2=0x7fc82c018bd8) at /test/12.0_opt/sql/item_cmpfunc.cc:65

...

#494 0x0000561e49a6a706 in cmp_row_type (item1=item1@entry=0x7fc82c018998, item2=0x7fc82c018bd8) at /test/12.0_opt/sql/item_cmpfunc.cc:65

#495 0x0000561e49a6a706 in cmp_row_type (item1=item1@entry=0x7fc82c018998, item2=0x7fc82c018bd8) at /test/12.0_opt/sql/item_cmpfunc.cc:65

#496 0x0000561e49a6a706 in cmp_row_type (item1=item1@entry=0x7fc82c018998, 

Core was generated by `/test/MD060625-mariadb-12.0.1-linux-x86_64-dbg/bin/mariadbd --no-defaults --max'.

Program terminated with signal SIGSEGV, Segmentation fault.

#0  0x0000557ecf94cc47 in Item_hybrid_func::type_handler (this=0x7f60c401b320)at /test/12.0_dbg/sql/item_func.h:516

[Current thread is 1 (LWP 6280)]

(gdb) bt

#0  0x0000557ecf94cc47 in Item_hybrid_func::type_handler (this=0x7f60c401b320)at /test/12.0_dbg/sql/item_func.h:516

#1  0x0000557ecf906c59 in Item::result_type (this=0x7f60c401b320)at /test/12.0_dbg/sql/item.h:1250

#2  0x0000557ecf927d1b in cmp_row_type (item1=0x7f60c401b320, item2=0x7f60c401b560) at /test/12.0_dbg/sql/item_cmpfunc.cc:64

#3  0x0000557ecf927d54 in cmp_row_type (item1=0x7f60c401b320, item2=0x7f60c401b560) at /test/12.0_dbg/sql/item_cmpfunc.cc:65

...

#494 0x0000557ecf927d54 in cmp_row_type (item1=0x7f60c401b320, item2=0x7f60c401b560) at /test/12.0_dbg/sql/item_cmpfunc.cc:65

#495 0x0000557ecf927d54 in cmp_row_type (item1=0x7f60c401b320, item2=0x7f60c401b560) at /test/12.0_dbg/sql/item_cmpfunc.cc:65

#496 0x0000557ecf927d54 in cmp_row_type (item1=0x7f60c401b320, 

    Rel    o/d  Build   Commit                                    UniqueID observed             

CS  10.6   dbg  060625  643319a7fb1e273797c2a1e46d76cfac0fa1da8f  No bug found                  

CS  10.6   opt  060625  643319a7fb1e273797c2a1e46d76cfac0fa1da8f  No bug found                  

CS  10.11  dbg  060625  11d1ac7285221ab4df7d9ef7cc8ee949b01c9b32  No bug found                  

CS  10.11  opt  060625  11d1ac7285221ab4df7d9ef7cc8ee949b01c9b32  No bug found                  

CS  11.4   dbg  060625  8c6cbb336081a5e1ad781df4a9778b61e3b4d73f  No bug found                  

CS  11.4   opt  060625  8c6cbb336081a5e1ad781df4a9778b61e3b4d73f  No bug found                  

CS  11.8   dbg  060625  67e6fdee05ead4974fe632e91c38941ade369b0c  No bug found                  

CS  11.8   opt  060625  67e6fdee05ead4974fe632e91c38941ade369b0c  No bug found                  

CS  12.0   dbg  060625  f1102da37a3dcdc8b92e0205f0a8bd878704b168  SIGSEGV|Item_hybrid_func::type_handler|Item::result_type|cmp_row_type|cmp_row_type

CS  12.0   opt  060625  f1102da37a3dcdc8b92e0205f0a8bd878704b168  SIGSEGV|Item::check_cols|cmp_row_type|cmp_row_type|cmp_row_type

CS  12.1   dbg  060625  4b79d7b8ee557d53a859aedec839b8673585b514  SIGSEGV|Item_hybrid_func::type_handler|Item::result_type|cmp_row_type|cmp_row_type

CS  12.1   opt  060625  4b79d7b8ee557d53a859aedec839b8673585b514  SIGSEGV|Item::check_cols|cmp_row_type|cmp_row_type|cmp_row_type

ES  10.5   dbg  060625  ec7bc4f84e490b25f52db7422a1e0e8bbea72fb1  No bug found                  

ES  10.5   opt  060625  ec7bc4f84e490b25f52db7422a1e0e8bbea72fb1  No bug found                  

ES  10.6   dbg  060625  8541ea1e4c2fa15789dd162f6ba4b32681f74e61  No bug found                  

ES  10.6   opt  060625  8541ea1e4c2fa15789dd162f6ba4b32681f74e61  No bug found                  

ES  11.4   dbg  060625  1c8b2d3059f5ccb67c042868baca3ee269c6eca7  No bug found                  

ES  11.4   opt  060625  1c8b2d3059f5ccb67c042868baca3ee269c6eca7  No bug found                  

MS  5.5    dbg  070123  bac287c315b1792e7ae33f91add6a60292f9bae8  No bug found                  

MS  5.5    opt  070123  bac287c315b1792e7ae33f91add6a60292f9bae8  No bug found                  

MS  5.6    dbg  070123  dab95781a1244104d6b87020ac2fc4d190ba2946  No bug found                  

MS  5.6    opt  070123  dab95781a1244104d6b87020ac2fc4d190ba2946  No bug found                  

MS  5.7    dbg  070525  f7680e98b6bbe3500399fbad465d08a6b75d7a5c  No bug found                  

MS  5.7    opt  070525  f7680e98b6bbe3500399fbad465d08a6b75d7a5c  No bug found                  

MS  8.0    dbg  060224  49ef33f7edadef3ae04665e73d1babd40179a4f1  No bug found                  

MS  8.0    opt  060224  49ef33f7edadef3ae04665e73d1babd40179a4f1  No bug found                  

MS  9.1    dbg  211024  61a3a1d8ef15512396b4c2af46e922a19bf2b174  No bug found                  

MS  9.1    opt  211024  61a3a1d8ef15512396b4c2af46e922a19bf2b174  No bug found