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fix copy instruction #84

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Merged
merged 1 commit into from
Apr 20, 2025
Merged

fix copy instruction #84

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8 changes: 6 additions & 2 deletions depyf/decompiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -808,9 +808,13 @@
self.state.stack[- n] = value

def COPY(self, inst: Instruction):
# not tested, don't know how to generate this instruction
n = inst.argval
value = self.state.stack[-1 - n]
# COPY argument is 1-based
# see https://discuss.python.org/t/the-oparg-of-the-new-copy-opcode-is-not-zero-based/22110
# n == 0 is a silent error and will be ignored by the interpreter
if n == 0:
return

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depyf/decompiler.py#L816 

Added line #L816 was not covered by tests
value = self.state.stack[-1 - (n - 1)]
self.state.stack.append(value)

def POP_TOP(self, inst: Instruction):
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