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Silence another gcc 11 warning.

Per buildfarm and local experimentation, bleeding-edge gcc isn'tconvinced that the MemSet in reorder_function_arguments() is safe.Shut it up by adding an explicit check that pronargs isn't negative,and by changing MemSet to memset. (It appears that either change isenough to quiet the warning at -O2, but let's do both to be sure.)

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src/backend/optimizer/util
- clauses.c

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`‎src/backend/optimizer/util/clauses.c`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -4095,9 +4095,9 @@ reorder_function_arguments(List *args, HeapTuple func_tuple)`
`4095`	`4095`	`inti;`
`4096`	`4096`
`4097`	`4097`	`Assert(nargsprovided <=pronargs);`
`4098`		`-if (pronargs>FUNC_MAX_ARGS)`
	`4098`	`+if (pronargs<0\|\|pronargs>FUNC_MAX_ARGS)`
`4099`	`4099`	`elog(ERROR,"too many function arguments");`
`4100`		`-MemSet(argarray,0,pronargssizeof(Node));`
	`4100`	`+memset(argarray,0,pronargssizeof(Node));`
`4101`	`4101`
`4102`	`4102`	`/* Deconstruct the argument list into an array indexed by argnumber */`
`4103`	`4103`	`i=0;`

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Commitd777e27

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`‎src/backend/optimizer/util/clauses.c`

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