g_object_unref: assertion 'G_IS_OBJECT (object)' failed about govips HOT 11 CLOSED

@oleh-ozimok #47

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Got the same issue.

(govips:45221): GLib-GObject-CRITICAL **: 02:46:21.849: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

Was able to reproduce with

	vips.Startup(&vips.Config{
		ConcurrencyLevel: 1,
		MaxCacheFiles:    100,
		MaxCacheMem:      104857600,
		MaxCacheSize:     1,
		ReportLeaks:      true,
		CacheTrace:       true,
		CollectStats:     true,
	})

libvips version: 8.6.4

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@davidbyttow ping

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hotfix, comment this line https://github.com/davidbyttow/govips/blob/master/pkg/vips/transform.go#L373

from govips.

Thanks, will fix!

from govips.

Also, I don't think this is that easy, I think it's only when it needs to convert the colorspace. I will address.

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Fixed: b66f7b4

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concurrent run this code will generate g_object_unref assertion (not only when it needs to convert the colorspace)

image, _ := vips.NewImageFromBuffer(blob)	

transform := vips.NewTransform().
		Image(image).
		Format(vips.ImageTypeJPEG).
		Quality(100).
		StripMetadata().Apply()

from govips.

Oh, that use case.. yeah, I see. OK

from govips.

Hello, I have got some more error. Did it have been fixed? @davidbyttow
my libvips version is:
[root@localhost ~]# vips --version vips-8.6.5-Wed Jul 25 09:46:22 UTC 2018 memory: high-water mark 0 bytes

error messages are:
`(govips:5276): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'

(govips:5276): GLib-GObject-CRITICAL **: g_signal_handler_is_connected: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(govips:5276): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
vips_image_dispose: temp-413 vips_reducev_gen computed 107%

(govips:5276): GLib-GObject-WARNING **: instance of invalid non-instantiatable type ''

(govips:5276): GLib-GObject-CRITICAL **: g_signal_handler_is_connected: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(govips:5276): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
end image.go transform func`

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Thanks everyone for the bug reports @ljs-cxm @tczf1128 @oleh-ozimok @xmackex . We've progressed to v2.0.2 and these should now be fixed. I'll close this generic report for now, I know it's been quite some time but can you please try and replicate bugs, and open issues with code samples to showcase clearly how to reproduce any bugs you get?

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