[Bug fortran/56735] New: Namelist Read Error with question marks
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735 Bug #: 56735 Summary: Namelist Read Error with question marks Classification: Unclassified Product: gcc Version: 4.6.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassig...@gcc.gnu.org ReportedBy: madawilli...@gmail.com Hi, This is my first ever bug report so apologies if i miss some vital piece of information. I have some legacy code which compiles and runs with versions of gfortran up to 4.5. However after this the code compiles and runs but the namelist is not read correctly. There is no IO errors but non of the variables are set to their respective values. I have managed to narrow this down to the fact that the legacy namelist has question marks in the namelist file outside of any data block. Below is a very simple code and namelist which shows this. If you remove the question mark from the name list the values are set, otherwise they are not. -test.f PROGRAM TEST INTEGER int1,int2,int3 NAMELIST /temp/ int1,int2,int3 OPEN (53,FILE='test.nam',STATUS='OLD', IOSTAT=istat) READ (53,temp) WRITE(*, temp) PRINT*, istat END PROGRAM -test.nam ? $temp int1=1 int2=2 int3=3 $END I understand this might be non standard formatting for the namelist file, but as I said it works with gfortran <4.6 so seems like a regression.
[Bug fortran/56735] Namelist Read Error with question marks
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735 --- Comment #2 from Adam Williams 2013-03-26 10:26:43 UTC --- Hi Dominique Cheers for the quick response. Here is my gfortran -v info: Using built-in specs. COLLECT_GCC=gfortran COLLECT_LTO_WRAPPER=/usr/local/gfortran/libexec/gcc/x86_64-apple-darwin11/4.6.2/lto-wrapper Target: x86_64-apple-darwin11 Configured with: ../gcc-4.6.2-RC-20111019/configure --prefix=/usr/local/gfortran --with-gmp=/Users/fx/devel/gcc/deps-static/x86_64 --enable-languages=c,c++,fortran,objc,obj-c++ --build=x86_64-apple-darwin11 Thread model: posix gcc version 4.6.2 20111019 (prerelease) (GCC) With the question mark in the namelist file i get the following output: &TEMP INT1= 17252416, INT2= 32767, INT3= 1589168960, / 0
[Bug fortran/56735] [4.6/4.7/4.8/4.9 Regression] Namelist Read Error with question marks
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735 --- Comment #5 from Adam Williams 2013-03-26 12:14:01 UTC --- Cheers Dominique, Unfortunately the code in question is ~25years old with an existing user base and the namelist is used to set a vast number of initial conditions for varying simulation runs. However, I will definitely suggest that we try move to a standard conforming namelist.
[Bug fortran/56735] [4.6/4.7/4.8/4.9 Regression] Namelist Read Error with question marks
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735 --- Comment #9 from Adam Williams 2013-03-30 18:42:44 UTC --- This is great. I look forward to testing when I get a chance to build from the latest dev branch. I understand what you mean with the "?", however they are being used in a completely non-standard way in the legacy code in question. They are actually being used as a marker in some formatted text which is kept at the top of a namelist file and read in separately. I will see if we can alter this, but unfortunately it is not my decision and backwards compatibility will need to be considered. Cheers for all your help/work
[Bug fortran/56735] [4.6/4.7/4.8/4.9 Regression] Namelist Read Error with question marks
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56735 --- Comment #14 from Adam Williams 2013-04-04 08:41:32 UTC --- Thanks for all your help
