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[flang][runtime] Don't crash on ASYNCHRONOUS='NO' in child I/O #124208

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Merged
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Jan 27, 2025
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[flang][runtime] Don't crash on ASYNCHRONOUS='NO' in child I/O #124208

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16 changes: 8 additions & 8 deletions flang/runtime/io-api.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -770,18 +770,18 @@ bool IODEF(SetAsynchronous)(
"SetAsynchronous() called after GetNewUnit() for an OPEN statement");
}
open->unit().set_mayAsynchronous(isYes);
} else if (!isYes) {
// ASYNCHRONOUS='NO' is the default, so this is a no-op
} else if (auto *ext{io.get_if<ExternalIoStatementBase>()}) {
if (isYes) {
if (ext->unit().mayAsynchronous()) {
ext->SetAsynchronous();
} else {
handler.SignalError(IostatBadAsynchronous);
}
if (ext->unit().mayAsynchronous()) {
ext->SetAsynchronous();
} else {
handler.SignalError(IostatBadAsynchronous);
}
} else if (!io.get_if<NoopStatementState>() &&
!io.get_if<ErroneousIoStatementState>()) {
handler.Crash("SetAsynchronous() called when not in an OPEN or external "
"I/O statement");
handler.Crash("SetAsynchronous('YES') called when not in an OPEN or "
"external I/O statement");
}
return !handler.InError();
}
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