MagickIdentifyImage + pseudo image crash

[Danack]

Hi,

Calling MagickIdentifyImage on an image created through MagickNewImage appears to crash with the message:

identify: magick/magick.c:662: GetMagickMimeType: Assertion `magick_info != (MagickInfo *) ((void *)0)' failed.
about to identifyAborted

Code example is below, or can be downloaded from https://github.com/Danack/imagemagickte ... identify.c where there is also a terrible make file (make identify') in the unlikely event that you need that. Apparently setting an image format when creating the image is a work-around to avoid the issue.

Code: Select all

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wand/MagickWand.h>

void ThrowWandException(MagickWand *wand) {
    char *description; 
    ExceptionType severity; 
    description = MagickGetException(wand, &severity); 
    (void) fprintf(stderr,"%s %s %lu %s\n",GetMagickModule(),description); 
    description=(char *) MagickRelinquishMemory(description); 
    exit(-1); 
}


int main(int argc,char **argv) {
    
    MagickBooleanType status;
    
    MagickWand *magick_wand, *pseudo_wand;
    char *filename;
        
    MagickWandGenesis();
    
    
    PixelWand *pixel_wand = NULL;
    pixel_wand = NewPixelWand();    
    PixelSetColor(pixel_wand, "white");
    
    
    magick_wand = NewMagickWand();

  
    int columns = 16;
    int rows = 16;
    
    status = MagickNewImage(magick_wand, columns, rows, pixel_wand);
    if (status == MagickFalse) {
        ThrowWandException(magick_wand);
    }

    char *identify;
    identify = MagickIdentifyImage (magick_wand);

    //Never gets here

    magick_wand = DestroyMagickWand(magick_wand);
    MagickWandTerminus();
    
    return(0);
}

[magick]

We can reproduce the problem you posted and have a patch in ImageMagick 6.8.9-2 Beta, available by sometime tomorrow. Thanks.