panic occurs in the GetImageBlob function

[SpacemanZoey]

I'm using gopkg.in/gographics/imagick.v2 v2.6.3 to convert pdf to jpg. In line "ret := C.GoBytes(unsafe.Pointer(csblob), C.int(clen))", it reports a panic. Is there anything to check csblob or clen is valid, or how to fix it

[justinfx]

Do you happen to have a reproduction that you could provide?

It may be the case that we need to check Getlasterror before we try and use the results.

You could also set the env var MAGICK_DEBUG to either Trace or Blob to see if it reports the underlying problem.

https://imagemagick.org/script/command-line-options.php#debug

[justinfx]

I was able to fix it by adding a check for C API ImageMagick errors, before calling our conversions.

[justinfx]

Tagged v2.6.4 and v3.5.3