Fix missing bounds check for JsonTreeReader.getPath()
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There are situations where the stack of JsonTreeReader contains a JsonArray or JsonObject without a subsequent Iterator, for example after calling peek() or nextName(). When JsonTreeReader.getPath() is called afterwards it therefore must not assume that a JsonArray or JsonObject is always followed by an Iterator. The only reason why this never caused an ArrayIndexOutOfBoundsException in the past is because the stack has an even default size (32) so it would just have read the next `null`. However, if the stack had for example the default size 31, a user created a JsonTreeReader for 16 JSON arrays nested inside each other, then called 15 times beginArray(), followed by peek() and getPath() the exception would occur.
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Thanks, good find! |
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There are situations where the
stackof JsonTreeReader contains a JsonArray or JsonObject without a subsequent Iterator, for example after callingpeek()ornextName().When
JsonTreeReader.getPath()is called afterwards it therefore must not assume that a JsonArray or JsonObject is always followed by an Iterator.The only reason why this never caused an ArrayIndexOutOfBoundsException in the past is because the stack has an even default size (32) so it would just have read the next
null.However, if the stack had for example the default size 31, a user created a JsonTreeReader for 16 JSON arrays nested inside each other, then called 15 times
beginArray(), followed bypeek()andgetPath()the exception would occur.