Tóth Béla 35ecf4c4a3
Fix "Invalid prefix operation" errors (#4577)
`--(-a);` returned with a postfix error before this patch.
The changes introduce a new warning for prefix errors, and
returns with the corresponding one based on current opcode.

JerryScript-DCO-1.0-Signed-off-by: Bela Toth tbela@inf.u-szeged.hu
2021-02-08 16:13:37 +01:00
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