Win 10, PHP 5.6/7 crashes @ fann_train_on_file with "CLI has stopped working"

[bfal]

I've tried installing the FANN 1.1.1, 1.1.0, 1.0.7 under PHP versions 5.6 & 7. Running the simple_train.php it crashes consistently at fann_train_on_file. Reducing $max_epochs makes it crash faster, reports never show up. running the xor_train.exe, simple_test.php does not crash.

[bfal]

I installed php 5.3 and FANN 1.1.1. Sometimes it makes it through, most times it crashes the same.

[bfal]

It appears to be related to the $epochs_between_reports setting. Changing it to 1 cause a crash every time. 0 or a huge number (more than $max_epochs) cause no crash and it completes. At no point does it show a report.

[bukka]

I'm not really a win user but if you would be able to produce backtrace, I could possibly see when it crashes and help more or ping someone else who could possibly help:

See https://bugs.php.net/bugs-generating-backtrace-win32.php how to get backtrace on win.

[bfal]

Thanks for the reply.

I believe I setup things correct but need a debug file for fandouble.dll? This is what I get:

Function Arg 1 Arg 2 Arg 3 Arg 4 Source
fanndouble!fann_destroy+3c 008326b8 0122cb38 01232d44 547d09d4
php_fann!get_module+7a 010c84e0 01110430 000001f4 0122cb38
php5ts!zend_hash_del_key_or_index+ac 00000000 00000000 00000000 00000000

Exception Information
FANNDOUBLE!FANN_DESTROY+3CWARNING - DebugDiag was not able to locate debug symbols for fanndouble.dll, so the information below may be incomplete.

In php__PID__15224__Date__08_02_2016__Time_06_33_05PM__391__Second_Chance_Exception_C0000005.dmp the assembly instruction at fanndouble!fann_destroy+3c in D:\test\fanndouble.dll has caused an access violation exception (0xC0000005) when trying to read from memory location 0x00000000 on thread 0

Module Information
Image Name: D:\test\fanndouble.dll Symbol Type: Export
Base address: 0x00905a4d Time Stamp: Mon Jan 23 10:05:47 2012
Checksum: 0x00000000 Comments:
COM DLL: False Company Name:
ISAPIExtension: False File Description:
ISAPIFilter: False File Version:
Managed DLL: False Internal Name:
VB DLL: False Legal Copyright:
Loaded Image Name: fanndouble.dll Legal Trademarks:
Mapped Image Name: Original filename:
Module name: fanndouble Private Build:
Single Threaded: False Product Name:
Module Size: 76.00 KBytes Product Version:
Symbol File Name: fanndouble.dll Special Build: &

[bukka]

Sorry for the slightly late reply. Might be related to the compile fanndouble.dll.

@weltling If you have a little bit of spare time, would you be able to check this on win 10:

$num_input = 2;
$num_output = 1;
$num_layers = 3;
$num_neurons_hidden = 3;
$desired_error = 0.001;
$max_epochs = 500000;
$epochs_between_reports = 1;

$ann = fann_create_standard($num_layers, $num_input, $num_neurons_hidden, $num_output);

if ($ann) {
    fann_set_activation_function_hidden($ann, FANN_SIGMOID_SYMMETRIC);
    fann_set_activation_function_output($ann, FANN_SIGMOID_SYMMETRIC);

    $filename = dirname(__FILE__) . "/xor.data";
    if (fann_train_on_file($ann, $filename, $max_epochs, $epochs_between_reports, $desired_error))
        fann_save($ann, dirname(__FILE__) . "/xor_float.net");

    fann_destroy($ann);
}

if you can see any crash? I just tested and it works fine on Linux. Possibly if you have any other idea how to better debug it or what could be the cause, that would be great!

[weltling]

@bukka you didn't link the file, so i took it ./examples/logic_gates/xor.data . With that on the current master, your snippet doesn't crash for me as well.