diff options
| author | Peter Klausler <pklausler@nvidia.com> | 2025-09-17 09:16:30 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-09-17 09:16:30 -0700 |
| commit | 1b777752ef1b4532710ffe443466c743b9d54e98 (patch) | |
| tree | e36843722a468e589204f3f2d24e6ef63c13c8e6 /flang-rt/lib | |
| parent | deb2861b07e503b729b854edbffdeae7cd4a1aa6 (diff) | |
[flang][runtime] Block bad left tabbing in child I/O (#158758)
Child I/O subroutines are not supposed to use T or TL control edit
descriptors in formats to move the position in the current record to a
point before where it stood at the time of their calls (F'2023
12.6.4.8.3 paragraph 18), but we should also guard against attempts to
do so, using the same means used to prevent such attempts in
non-advancing I/O.
Fixes https://github.com/llvm/llvm-project/issues/158723.
Diffstat (limited to 'flang-rt/lib')
| -rw-r--r-- | flang-rt/lib/runtime/unit.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/flang-rt/lib/runtime/unit.cpp b/flang-rt/lib/runtime/unit.cpp index da3783417f23..549fbeaca05b 100644 --- a/flang-rt/lib/runtime/unit.cpp +++ b/flang-rt/lib/runtime/unit.cpp @@ -827,6 +827,7 @@ ChildIo &ExternalFileUnit::PushChildIo(IoStatementState &parent) { Terminator &terminator{parent.GetIoErrorHandler()}; OwningPtr<ChildIo> next{New<ChildIo>{terminator}(parent, std::move(current))}; child_.reset(next.release()); + leftTabLimit = positionInRecord; return *child_; } |