Fixed regexp undefined value of captured group. #900
Merged
+5
−17
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The issue was found by OSS-Fuzz. Segmentation fault at the input:
' a'.split(/|()/)
Actually that is old issue: previously (before removing short_strings in #848) to obtain value of captured group was used njs_string_prop() without check for its value argument type and it by mistake converted undefined value to empty string, while there is expected undefined value itself. After removing short_strings, njs_string prop() throws segmentation fault.