0000813: FIXED: minlmoptimize enters an infinite loop when fvec throws an exception on Windows x64

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Category

Severity

Reproducibility

Date Submitted

Last Update

0000813

[ALGLIB] Optimization

minor

always

2018-04-24 11:06

2018-04-27 16:06

Reporter

rmanthorpe

View Status

public

Assigned To

SergeyB

Priority

normal

Resolution

fixed

Status

resolved

Product Version

3.13.0

Summary

0000813: FIXED: minlmoptimize enters an infinite loop when fvec throws an exception on Windows x64

Description

In recent versions of MSVC setjmp/longjmp used by ALGLIB internally interferes with throw/catch also used by ALGLIB to catch user exceptions. MSVC does not support longjmp() out of catch() clause (even though jump itself seems to be legitimate). Code starts looping forever.

New version of ALGLIB exception handling code better separates these two strategies, so no eternal loop takes place.

=== ORIGINAL MESSAGE ===================================================

The example below should exit with status 1 but never completes on Windows x64 using Visual Studio 2015 Update 3. It works as expected on Windows x86 and Linux.

test.cpp
---------------------------------------------------------------
#include "optimization.h"

void callback(const alglib::real_1d_array&, alglib::real_1d_array&, void*)
{
    throw 0;
}

int main()
{
    alglib::minlmstate state;
    alglib::real_1d_array x;
    x.setlength(1);
    alglib::minlmcreatev(1, x, 1e-5, state);
    try
    {
        alglib::minlmoptimize(state, &callback);
    }
    catch(...)
    {
        return 1;
    }
    return 0;
}

Additional Information

Programming language

C++

Attached Files

Relationships

Notes
(0000072) SergeyB (administrator) 2018-04-26 15:51	OK, confirmed issue, started to debug

(0000073) SergeyB (administrator) 2018-04-26 18:06	It turned out to be easy - in recent versions of MSVC setjmp/longjmp used by ALGLIB internally interferes with throw/catch also used by ALGLIB to catch user exceptions. Will be fixed in the upcoming 3.14.0. Thank you for the report!

Issue History
Date Modified	Username	Field	Change
2018-04-24 11:06	rmanthorpe	New Issue
2018-04-24 11:06	rmanthorpe	Programming language	=> C++
2018-04-26 15:50	SergeyB	Assigned To	=> SergeyB
2018-04-26 15:50	SergeyB	Status	new => feedback
2018-04-26 15:51	SergeyB	Status	feedback => assigned
2018-04-26 15:51	SergeyB	Note Added: 0000072
2018-04-26 16:32	SergeyB	Target Version	=> 3.14.0
2018-04-26 18:06	SergeyB	Note Added: 0000073
2018-04-27 16:06	SergeyB	Summary	Minlmoptimize enters an infinite loop when fvec throws an exception on Windows x64 => FIXED: minlmoptimize enters an infinite loop when fvec throws an exception on Windows x64
2018-04-27 16:06	SergeyB	Description Updated
2018-04-27 16:06	SergeyB	Status	assigned => resolved
2018-04-27 16:06	SergeyB	Fixed in Version	=> 3.14.0
2018-04-27 16:06	SergeyB	Resolution	open => fixed

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