Comment (by Roland Haas):

Hmm, maybe clarification: the code snippet shown in the description is the old code, the proposed change uses long long int _error_code = (fn_call); (actually fails to compile without, with an error ““).

I’ll add the do { } while (0) trick.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2871/eos_omnis-nuceos-code-used-int-to-hold