tree d4394f3dadbe49c9adb549fef7a47f78387df2fc
parent 68bf3d8cca30d5c8729bf1078cfdf4f9b1b04191
author Peter Klausler <pklausler@nvidia.com> 1686076672 -0700
committer Copybara-Service <copybara-worker@google.com> 1686078051 -0700

[flang] Set "undefined" NEXTREC=n variable to 0 rather than random garbage

12.10.2.17 defines that a INQUIRE statement's NEXTREC=n output value
for a unit that is not connected for direct access becomes undefined,
but the current I/O runtime can fail in a confusing manner by trying
to return uninitialized stack garbage.

Reported on Slack by Tarun Prabhu as an intermittent failure in
the gfortran regression test inquire_pre.f90.

Differential Revision: https://reviews.llvm.org/D152295

GitOrigin-RevId: e468f07550c56eeb49659d02c7c5c3f79f53db6f