prevent infinite loop if source length is 0
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@ -324,7 +324,7 @@ class Backend {
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{},
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{},
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options
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options
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);
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);
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if (definitions.length > 0) {
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if (definitions.length > 0 && sourceLength > 0) {
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dictTermsSort(definitions);
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dictTermsSort(definitions);
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const {expression, reading} = definitions[0];
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const {expression, reading} = definitions[0];
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const source = text.substring(0, sourceLength);
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const source = text.substring(0, sourceLength);
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