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6e1cca5113
get_explain_guc_options() crashed if a string GUC marked GUC_EXPLAIN has a NULL boot_val. Nosing around found a couple of other places that seemed insufficiently cautious about NULL string values, although those are likely unreachable in practice. Add some commentary defining the expectations for NULL values of string variables, in hopes of forestalling future additions of more such bugs. Xing Guo, Aleksander Alekseev, Tom Lane Discussion: https://postgr.es/m/CACpMh+AyDx5YUpPaAgzVwC1d8zfOL4JoD-uyFDnNSa1z0EsDQQ@mail.gmail.com |
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