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https://issues.apache.org/jira/browse/PROTON-2517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17506297#comment-17506297
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ASF GitHub Bot commented on PROTON-2517:
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cliffjansen opened a new pull request #362:
URL: https://github.com/apache/qpid-proton/pull/362
Intercepts all pn_data_t emitter functions and does rewind.
In array case, also points to first node so that pn_data_type and
pn_data_get_array work properly.
These are consistent with the old codec.
Not done: save and restore of pn_data_t state at entry and exit on the
assumption that the callers of the emmiter functions do not expect this state
preserved.
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> The new C codec can misinterpret pn_data_t values resulting in unintended
> wire data.
> ------------------------------------------------------------------------------------
>
> Key: PROTON-2517
> URL: https://issues.apache.org/jira/browse/PROTON-2517
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: proton-c-0.37.0
> Reporter: Clifford Jansen
> Assignee: Clifford Jansen
> Priority: Major
>
> See the C++ frame trace from
> https://issues.redhat.com/browse/ENTMQCL-3278
> The zero length array is printed instead of a null because the test in
> emit_multiple() from emitters.h fails to set the current node of the
> pn_data_t to the first node. The test
> if (pn_data_type(data) == PN_ARRAY) { //...
> fails and the array processing logic is bypassed, including the lines
> switch (pn_data_get_array(data)) {
> case 0:
> pni_emitter_writef8(emitter, PNE_NULL);
>
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