query with system function: "index"(varchar, boolean) fails with GDK error or assertion failure.

[mvdvm]

Describe the bug
Select query with system function "index"(name, true) produces a GDK error:
createExceptionInternal: !ERROR: MALException:algebra.projection:GDK reported error: project1_bte: does not match always

Select query with system function "index"(name, false) triggers an assertion failure:
gdk/gdk_bat.c:2537: BATassertProps: Assertion `strcmp(b->theap->filename, filename) == 0' failed.

To Reproduce
compile mserver5 from Jan2022 branch and start it.
start mclient and run queries:
select name, "index"(name, true) nm_idx from sys.schemas order by nm_idx;
select name, "index"(name, false) nm_idx from sys.schemas order by nm_idx;

Expected behavior
+----------+--------+
| name | nm_idx |
+======+======+
| sys | 4 |
| tmp | 12 |
| json | 20 |
| profiler | 32 |
| wlc | 48 |
| wlr | 56 |
| logging | 64 |
+----------+--------+

Software versions

• MonetDB version number: MonetDB 5 server v11.43.8 (hg id: 0768335463bb)
• OS and version: Fedora 35
• self-compiled with assertions enabled

[PedroTadim]

We removed these functions on pushcands. We can remove them on default.

[sjoerdmullender]

Fixed in Jan2022 branch. We should probably indeed remove these on the default branch.