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8273135: java/awt/color/ICC_ColorSpace/MTTransformReplacedProfile.java crashes in liblcms.dylib with NULLSeek+0x7 #5436

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@@ -1532,7 +1532,7 @@ cmsBool IsTypeSupported(cmsTagDescriptor* TagDescriptor, cmsTagTypeSignature Typ
void* CMSEXPORT cmsReadTag(cmsHPROFILE hProfile, cmsTagSignature sig)
{
_cmsICCPROFILE* Icc = (_cmsICCPROFILE*) hProfile;
cmsIOHANDLER* io = Icc ->IOhandler;
cmsIOHANDLER* io;
cmsTagTypeHandler* TypeHandler;
cmsTagTypeHandler LocalTypeHandler;
cmsTagDescriptor* TagDescriptor;
@@ -1573,6 +1573,7 @@ void* CMSEXPORT cmsReadTag(cmsHPROFILE hProfile, cmsTagSignature sig)

if (TagSize < 8) goto Error;

io = Icc ->IOhandler;
// Seek to its location
if (!io -> Seek(io, Offset))
goto Error;
@@ -34,7 +34,7 @@

/**
* @test
* @bug 8271718
* @bug 8271718 8273135
* @summary Verifies MT safety of color transformation while profile is changed
*/
public final class MTTransformReplacedProfile {