0000824: FIXED: breaking change in exception handling in user callbacks

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Severity

Reproducibility

Date Submitted

Last Update

0000824

[ALGLIB] Optimization

minor

always

2018-09-04 11:57

2019-12-18 15:54

Reporter

rmanthorpe

View Status

public

Assigned To

SergeyB

Priority

normal

Resolution

fixed

Status

resolved

Product Version

3.14.0

Summary

0000824: FIXED: breaking change in exception handling in user callbacks

Description

Fixed. Now exceptions generated in user callbacks are forwarded to external code.

---------------------------------------------------------------

The example below should print "user error" but instead prints "ALGLIB: exception generated in user callback". This change happened between 3.12 and 3.13. It's now no longer possible to find out what caused optimisation to fail, only that an exception was thrown.

test.cpp
---------------------------------------------------------------
#include "optimization.h"
#include <cstdio>

void callback(const alglib::real_1d_array&, alglib::real_1d_array&, void*)
{
    throw "user error";
}

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 (const char* e)
    {
        std::printf(e);
    }
    catch (alglib::ap_error& e)
    {
        std::printf(e.msg.c_str());
    }
    return 0;
}

Additional Information

Programming language

C++

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Issue History
Date Modified	Username	Field	Change
2018-09-04 11:57	rmanthorpe	New Issue
2018-09-04 11:57	rmanthorpe	Programming language	=> C++
2019-09-03 16:26	SergeyB	Target Version	=> 3.16.0
2019-12-18 15:53	SergeyB	Status	new => assigned
2019-12-18 15:53	SergeyB	Assigned To	=> SergeyB
2019-12-18 15:53	SergeyB	Status	assigned => resolved
2019-12-18 15:53	SergeyB	Fixed in Version	=> 3.16.0
2019-12-18 15:53	SergeyB	Resolution	open => fixed
2019-12-18 15:54	SergeyB	Summary	Breaking change in minlmoptimize exception handling => FIXED: breaking change in exception handling in user callbacks
2019-12-18 15:54	SergeyB	Description Updated

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