Backtrace Error Fortran
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Gfortran Backtrace Line Numbers
Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions fortran segmentation fault invalid memory reference Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. segmentation fault gfortran Join them; it only takes a minute: Sign up Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: up vote -3 down vote favorite I have compiled a fortran 95 program in Ubuntu 14.04. Upon running, I got the following error: This is different from:(1) Program received signal SIGSEGV: Segmentation fault - invalid memory
Fortran Segmentation Fault (core Dumped)
reference. Backtrace for this error: ^Z [9]+ Stopped ./a.out I even tried gfortran -g -fcheck=all -Wall DoubExchange.f95 But got the same fault message. My program: ! HAMILTONIAN Diagonalization for a 2D Lattice of N sites or (N_X) X (N_Y) size, with DOUBLE EXCHANGE. ! ! ! D O U B L E E X C H A N G E ! ! ! PROGRAM DOUBLE_EXCHANGE implicit none integer:: I, J, K, M, Z, P, L, SIZ, CONT, POINT, S integer,parameter :: seed = 8645642 ! character:: N, U real*8:: H real :: start, finish ! .. Parameters .. INTEGER N, N_X, N_Y INTEGER LDA INTEGER LWMAX PARAMETER ( LWMAX = 1000 ) ! ! .. Local Scalars .. ! INTEGER INFO, LWORK ! ! .. Local Arrays .. ! RWORK dimension should be at least MAX(1,3*N-2) ! DOUBLE PRECISION,ALLOCATABLE,DIMENSION(:):: EIG REAL*8,ALLOCATABLE,DIMENSION(:,:):: F1 REAL*8,ALLOCATABLE,DIMENSION(:):: WORK call cpu_time(start) open(1,file='DOUBLE_EXCHANGE.dat') open(2,file='DOUBLE_EXCHANGE.txt') ! ! We are considering a 2D square lattice of 3 X 3 ! CALL srand(seed) !! LATTICE DESCRIPTION !! N_X = 2 N_Y = 2
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Segmentation Fault Core Dumped Fortran 90
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million http://stackoverflow.com/questions/26076557/program-received-signal-sigsegv-segmentation-fault-invalid-memory-reference programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Fortran 90 - “Segmentation fault - invalid memory reference” with scalable 3D array up vote 4 down vote favorite I have compiled a fortran 90 program with gfortran which builds a scalable 3D array in a way I want. http://stackoverflow.com/questions/23130045/fortran-90-segmentation-fault-invalid-memory-reference-with-scalable-3d-ar Upon running, I get the following error: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0x10542ee42 #1 0x10542f60e #2 0x7fff8d7895a9 #3 0x10542575e #4 0x105425975 #5 0x105425d0e Segmentation fault: 11 I believe this is a memory issue with the large 3D array, as it works if I decrease the dimensions, but is there anyway to get around this? Here is my code: PROGRAM phantomtest IMPLICIT NONE INTEGER, PARAMETER:: columns=34, rows=34, diags=((4*columns)-6), m=(4*columns)-6+(2*columns) REAL, ALLOCATABLE, DIMENSION(:,:,:)::phantom INTEGER :: i, j, k CHARACTER (LEN=3) :: nstring, nullstring='' ALLOCATE(phantom(columns,rows,m)) phantom=0 CALL Phantom_Making(phantom,columns,rows,diags,m) WRITE(nstring,FMT="(I3)"), columns PRINT*, nullstring DO k=1,m DO i=1,columns WRITE(*,FMT="("//nstring//"I2)") phantom(i,:,k) END DO PRINT *, nullstring END DO END PROGRAM phantomtest !--------------------------- SUBROUTINE Phantom_Making(phantom,columns,rows,diags,m) IMPLICIT NONE INTEGER, INTENT(IN):: columns, rows, diags, m REAL, DIMENSION(columns,rows,m), INTENT(INOUT) :: phantom INTEGER :: i, j, k, l !Vertical and horizontal rays DO i=1,rows phantom(:,i,i) = 1 phantom(i,:,i+(columns)+(diags/2)) = 1 END DO !Diagonal rays phantom(1,2,1+columns) = 1 phantom(2,1,1+columns) = 1 phantom(1,columns-1,1+columns+(diags/2)+rows) = 1 phanto
C. We will show various compiler options that can give you additional information. We will touch on using the gdb debugger, but only using one simple command. http://geco.mines.edu/guide/errortracking/ We will start with some definitions and then look first at Fortran, because https://sourceforge.net/p/mingw-w64/bugs/487/ information is easier to get. Then we will look at some C examples. The examples shown here are serial, not parallel MPI. If the examples were parallel the output would be similar except there would be multiple copies. Some definitions: Segmentation fault Segmentation faults are most often caused by memory errors. That is, segmentation fault your program is trying to access memory it does not own. This can occur when your program tries to access an array element that is out of bounds or tries to use a pointer that is not allocated. It is possible for you can "get lucky" and access an array element out of bounds or access an invalid pointer and not generate an error. In Fortran, you fortran segmentation fault can force (most) array and pointer accesses to be checked by specifying compile time options. Arithmetic Error Arithmetic errors are the result of illegal mathematical operations, such as dividing a number by zero, or having an illegal value for a function such as sqrt(-1.0). You can also have overflow errors which means that you have performed an operation that returns a value outside of what the computer can represent, such as x=(1e100)**100. Arithmetic errors do not normally cause program termination but you might get NaN or Inf printed instead of "normal" numbers. These stand for Not a Number and Infinity. In Fortran, you can force program termination on arithmetic errors by specifying compile time options. For C programs you can also force termination but it requires some simple program modification. We will look at both cases. Core file and core dump When a program terminates abnormally it will sometimes produce a core file or core dump. The normal name for these files is core.##### where ##### represents the process number. Core files contain a description of the state of a program when it terminates. Sometimes you can find information about the program termination from a core fi
for 32 and 64 bit Windows Bugs MinGW-w64 - for 32 and 64 bit Windows A complete runtime environment for gcc Brought to you by: jon_y, ktietz70, nightstrike Summary Files Reviews Support Wiki ▾ Wiki Wiki2 Mailing Lists Tickets ▾ External Testsuite Failures Bugs Support Requests Patches (Obsolete, use public Mailing List) Feature Requests News Discussion Donate Code Git ▾ web ironcrate mingw-w64 portablexdr Create Ticket View Stats Group v1.0 (example) Searches Changes Closed Tickets Open Tickets Help Formatting Help #487 OPEN bug in gFortran 5.1.0 Milestone: v1.0 (example) Status: open Owner: nobody Labels: gFortran OPEN (1) Priority: 5 Updated: 2015-10-05 Created: 2015-07-09 Creator: John Campbell Private: No mingw gFortran Ver 5.1.0 does not open files that exist, but reports "Program received signal SIGSEGV: Segmentation fault - invalid memory reference" The valid open statement is: OPEN (UNIT=98, FILE=JOURNAL, STATUS='UNKNOWN', IOSTAT=iostat, iomsg=msg) I have attached a short test program that exhibits the problem, together with listing of .bat, interactive gdb commands and trace of error report. Files that do not exist open successfully, but files that do exist fail, locking up the cmd.exe box. This bug means that programs can create files but not read from data files. gcc version 5.1.0 (x86_64-posix-seh-rev0, Built by MinGW-W64 project) I am running in cmd.exe on Windows 7 Home Premium Service Pack 1 1 Attachments ver510e.tce Related Bugs: #487 Discussion John Campbell - 2015-07-10 I hope someone can review this bug report, as if my test results are generally the case, this gFortran version 5.1.0 is not useable. If you can't open an input file then a major group of Fortran programs can not be generated by this compiler. This problem does not exist with Ver 4.9.2 If you would like to refer to this comment somewhere else in this project, copy and paste the following link: Mark Hampson - 2015-07-31 I'm also getting this behavior. Edit: I'd like to add that this happens for both the 32bit and 64bit versions, with any combinations of ACCESS/STATUS/POSITION/ACTION. As long as the file already exits, the 5.1.0 rev0 builds will throw a SIGSEGV. Edit²: The build: "gcc-5-win64_5.1.1-20150715.7z" at "https://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/dongsheng-daily/5.x/" works, in case this may