Revert encoding check in enc_set_default_encoding

peterzhu2118 · peterzhu2118 · commit 02059b313bca · 2025-08-18T16:40:10.000-04:00
It prevents a string from being used for `encoding`.
diff --git a/encoding.c b/encoding.c
@@ -1601,7 +1601,7 @@ enc_set_default_encoding(struct default_encoding *def, VALUE encoding, const cha
         overridden = TRUE;
 
     if (!NIL_P(encoding)) {
-        must_encoding(encoding); // loads it if necessary. Needs to be done outside of VM lock.
+        enc_check_encoding(encoding); // loads it if necessary. Needs to be done outside of VM lock.
     }
 
     GLOBAL_ENC_TABLE_LOCKING(enc_table) {

Original file line number	Diff line number	Diff line change
`@@ -1601,7 +1601,7 @@ enc_set_default_encoding(struct default_encoding *def, VALUE encoding, const cha`
`1601`	`1601`	`overridden = TRUE;`
`1602`	`1602`
`1603`	`1603`	`if (!NIL_P(encoding)) {`
`1604`		`- must_encoding(encoding); // loads it if necessary. Needs to be done outside of VM lock.`
	`1604`	`+ enc_check_encoding(encoding); // loads it if necessary. Needs to be done outside of VM lock.`
`1605`	`1605`	`}`
`1606`	`1606`
`1607`	`1607`	`GLOBAL_ENC_TABLE_LOCKING(enc_table) {`