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ac75959cdc
None of the code that uses GUC values is really prepared for them to hold NaN, but parse_real() didn't have any defense against accepting such a value. Treat it the same as a syntax error. I haven't attempted to analyze the exact consequences of setting any of the float GUCs to NaN, but since they're quite unlikely to be good, this seems like a back-patchable bug fix. Note: we don't need an explicit test for +-Infinity because those will be rejected by existing range checks. I added a regression test for that in HEAD, but not older branches because the spelling of the value in the error message will be platform-dependent in branches where we don't always use port/snprintf.c. Discussion: https://postgr.es/m/1798.1552165479@sss.pgh.pa.us |
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