Compiler flags identifying floating divide by zero runtime error #55
Description
The version number of the MASA library (versioning information can be obtained by running the masa_version binary located in the bin/ directory of a local MASA installation)
the hardware and operating system
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MASA Library: Version = 0.51.0 (5100)
Development Build
Build Date = 2019-10-09 14:05
Build Host = nia-login05.scinet.local
Build User = dcp
Build Arch = x86_64-pc-linux-gnu
Build Rev = 7351ff92
C++ Config = mpicxx -O0
F90 Config = mpifc-O0
Optional Features:
Python support enabled = no
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A description of the bug behavior
I am using MASA via the Fortran90 interface and compiling my source code with the following Intel Fortran compiler:
mpif90 for the Intel(R) MPI Library 2018 Update 3 for Linux*
Copyright(C) 2003-2018, Intel Corporation. All rights reserved.
__INTEL_PRE_FFLAGS options: -gcc-name=core-gcc -gxx-name=core-g++
ifort version 18.0.3
When I use the following flags (among others) to compile my source code, specifically
-check all,noarg_temp_created -init=snan -init=zero -init=arrays
I obtain the following runtime error when running my executable:
forrtl: error (73): floating divide by zero
Image PC Routine Line Source
jetstream_x86_64 000000000043E8CE Unknown Unknown Unknown
libpthread-2.17.s 00002B34AD110630 Unknown Unknown Unknown
jetstream_x86_64 00000000004FEEA1 Unknown Unknown Unknown
libfmasa-0.51.so 00002B34AB54832D _ZN4MASA27fans_sa Unknown Unknown
libfmasa-0.51.so 00002B34AB547F7B _ZN4MASA27fans_sa Unknown Unknown
libfmasa-0.51.so 00002B34AB546D84 _ZN4MASA27fans_sa Unknown Unknown
libfmasa-0.51.so 00002B34AB482130 Unknown Unknown Unknown
libfmasa-0.51.so 00002B34AB480A9A Unknown Unknown Unknown
libfmasa-0.51.so 00002B34AB48C254 _ZN4MASA9masa_ini Unknown Unknown
libfmasa-0.51.so 00002B34AB5147C0 masa_init Unknown Unknown
libfmasa-0.51.so 00002B34AB4804DB masa_mp_masa_init Unknown Unknown
libdiablo.so 00002B34A05933CE verify_mod_mp_gen 10911 Verify_Mod.f90
For reference, Line 10911 in my Fortran90 source code is a call to masa_init:
!-- initialize the problem
call masa_init('test',trim(adjustl(desired_mms_function)))
where desired_mms_function = 'euler_2d'. Note that when I compile without the aforementioned flags (i.e., without -check all,noarg_temp_created -init=snan -init=zero -init=arrays), MASA runs correctly. For reference, the functions of the flags of interest are as follows (more info here):
-init=arraysspecifies that we initialize all unitialized arrays and variables by the following;-init=naninitializes all unitialized REAL and COMPLEX variables/arrays to nans to get caught by the nantrapping-init=zeroinitializes all unitialized REAL, COMPLEX, INTEGER, and LOGICAL variables/arrays to zero
My guess is that there are some unintialized variables in MASA, potentially in fans_sa.cpp (based on the above error message that I am getting), that are being caught by these flags, however I have been unable to identify specifically what part of the code is leading to the runtime error. Does anyone know how to address this issue?