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add non-negative check in second parameter for subStr

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Jack Dockerty 2022-03-16 16:17:56 +00:00 committed by Stanisław Barzowski
parent f0a060e259
commit 9e9321f69a
1 changed files with 5 additions and 0 deletions
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5
builtins.go
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@ -991,6 +991,11 @@ func builtinSubstr(i *interpreter, inputStr, inputFrom, inputLen value) (value,
return nil, makeRuntimeError(msg, i.getCurrentStackTrace())
}
if fromV.value < 0 {
msg := fmt.Sprintf("substr second parameter should be greater than zero, got %f", fromV.value)
return nil, makeRuntimeError(msg, i.getCurrentStackTrace())
}
lenV, err := i.getNumber(inputLen)
if err != nil {
msg := fmt.Sprintf("substr third parameter should be a number, got %s", inputLen.getType().name)