https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67367
Bug ID: 67367
Summary: Program crashes on READ(IOSTAT=IOS, ...) on directory
OPEN()ed without error
Product: gcc
Version: 4.9.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: urbanjost at comcast dot net
Target Milestone: ---
Created attachment 36257
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36257&action=edit
commands and their output show system type, compiler version, source code and
saved temp files
When I read a list of filenames from the command line the list can easily
contain non-standard-file names such as directories. If I OPEN() a name that is
a directory with default options I get an error on the OPEN() (IOSTAT=21) and
IOMSG reports "file is a directory". But I am opening the files as read-only
streams. With those options the OPEN() gives no errors. But the first READ() of
the files causes the program to halt abruptly with no messages. No core file is
produced; I/O on open files is not flushed or closed properly.
I would have expected the OPEN() to have failed with an error; or if it is
legal to open a directory as a stream (which would be useful but surprising) I
would expect the READ to have trapped the error as the READ() uses IOSTAT=.
