Re: [Pharo-dev] wrong method trailer kind

[Tudor Girba]

Ok, but still I do not understand how did the methods end up having a problem 
with the method trailer? And what can we do about it?

Doru


> On Feb 27, 2016, at 12:32 PM, Nicolai Hess  wrote:
> 
> 
> 
> 2016-02-27 0:36 GMT+01:00 Eliot Miranda :
> Hi Nicolai,
> 
> On Fri, Feb 26, 2016 at 1:50 PM, Nicolai Hess  wrote:
> 17618 Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
> Interesting bug.
> someone who can tell me what exactly is this trailer kind and why it is based
> on some "flag" in "method at: method size".
> 
> There's a rich class comment in CompiledMethodTrailer which explains a lot, 
> but let me add a little.
> 
> Ah, yes, thanks, sorry, should have read the class comments first:-)
>  
> 
> Back in the day the source pointer in methods (the pointer that says which of 
> the two source files and where in the file a method's source is kept) was 
> stored in three bytes added onto the end of a CompiledMethod after its endPC. 
>  Then Dan Ingalls added the ability to not have source files at all but just 
> to have named temporary variables.  he added a compressed version of the temp 
> names in bytes tacked on at the end of a method, replacing the source 
> pointer.  IIRC the difference between a source pointer, no source pointer, or 
> a compressed version of the temp names was all encoded in the last byte.
> 
> 
> Interesting.
>  
> 
> Round about 2009 Igor Stasenko did a really nice reimplementation of this 
> scheme where he factored out the encoding tricks into CompiledMethodTrailer, 
> allowing one to generalize the scheme and add new encoding types, for a total 
> of 256 different kinds of trailer.
> 
> Yes I do remember his work on this.
>  
> 
> (and if you already know all of this, forgive me for trying to teach you to 
> suck eggs)
> Anyway this trailer is
> 
> CompiledMethodTrailer >>encodeEmbeddedSourceQCompress
> 
>   "data is string with method's source code, encode it using qCompress 
> method"
>   self encodeUsingQCompress
> 
> CompiledMethodTrailer >>decodeEmbeddedSourceQCompress
> 
>   "data is string with method's source code, encoded using qCompress 
> method"
>   self qDecompress.
> 
> HTH
> 
> Thanks Eliot
>  
> 
> And why it seems to be wrong for many GT-methods:
> 
> (CompiledMethod allInstances select:[:m | (m at: m size) = 24]) collect:[:k | 
> k -> k trailer kind] "an Array(String 
> class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress 
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress 
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable 
> class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag 
> class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation 
> class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress 
> LiteralVariable 
> class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress 
> GTSpotterRecorderEvent class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress 
> MetacelloAbstractPackageSpec 
> class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress 
> MetacelloProjectReferenceSpec 
> class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress 
> MetacelloProjectSpec class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress 
> MetacelloSpec class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress 
> MetacelloVersion class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress 
> GLMPresentation class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag 
> class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag 
> class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress 
> GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick 
> class>>#gtExample->#EmbeddedSourceQCompress 
> GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress 
> GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress 
> GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress 
> GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples 
> class>>#l->#EmbeddedSourceQCompress GTDummyExamples 
> class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid 
> class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick 
> class>>#gtExample->#EmbeddedSourceQCompress FileReference 
> class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement 
> class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress 
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress 
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"
> 
> _,,,^..^,,,_
> best, 

Re: [Pharo-dev] wrong method trailer kind

[David T. Lewis]

On Sat, Feb 27, 2016 at 12:32:06PM +0100, Nicolai Hess wrote:
> 2016-02-27 0:36 GMT+01:00 Eliot Miranda :
> 
> >
> > Round about 2009 Igor Stasenko did a really nice reimplementation of this
> > scheme where he factored out the encoding tricks into
> > CompiledMethodTrailer, allowing one to generalize the scheme and add new
> > encoding types, for a total of 256 different kinds of trailer.
> >
> 
> Yes I do remember his work on this.
>

Igor's enchancement also enabled us to eliminate the size restriction
on the changes file.

Dave
 

Re: [Pharo-dev] wrong method trailer kind

[Nicolai Hess]

2016-02-27 0:36 GMT+01:00 Eliot Miranda :

> Hi Nicolai,
>
> On Fri, Feb 26, 2016 at 1:50 PM, Nicolai Hess 
> wrote:
>
>> 17618
>> 
>> Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
>> Interesting bug.
>> someone who can tell me what exactly is this trailer kind and why it is
>> based
>> on some "flag" in "method at: method size".
>>
>
> There's a rich class comment in CompiledMethodTrailer which explains a
> lot, but let me add a little.
>

Ah, yes, thanks, sorry, should have read the class comments first:-)


>
> Back in the day the source pointer in methods (the pointer that says which
> of the two source files and where in the file a method's source is kept)
> was stored in three bytes added onto the end of a CompiledMethod after its
> endPC.  Then Dan Ingalls added the ability to not have source files at all
> but just to have named temporary variables.  he added a compressed version
> of the temp names in bytes tacked on at the end of a method, replacing the
> source pointer.  IIRC the difference between a source pointer, no source
> pointer, or a compressed version of the temp names was all encoded in the
> last byte.
>


Interesting.


>
> Round about 2009 Igor Stasenko did a really nice reimplementation of this
> scheme where he factored out the encoding tricks into
> CompiledMethodTrailer, allowing one to generalize the scheme and add new
> encoding types, for a total of 256 different kinds of trailer.
>

Yes I do remember his work on this.


>
> (and if you already know all of this, forgive me for trying to teach you
> to suck eggs)
> Anyway this trailer is
>
> CompiledMethodTrailer >>encodeEmbeddedSourceQCompress
>
> "data is string with method's source code, encode it using qCompress
> method"
> self encodeUsingQCompress
>
> CompiledMethodTrailer >>decodeEmbeddedSourceQCompress
>
> "data is string with method's source code, encoded using qCompress method"
> self qDecompress.
>
> HTH
>

Thanks Eliot


>
> And why it seems to be wrong for many GT-methods:
>>
>> (CompiledMethod allInstances select:[:m | (m at: m size) = 24])
>> collect:[:k |
>> k -> k trailer kind] "an Array(String
>> class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress
>> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress
>> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable
>> class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine
>> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser
>> class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag
>> class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object
>> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation
>> class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress
>> LiteralVariable
>> class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress
>> GTSpotterRecorderEvent
>> class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress
>> MetacelloAbstractPackageSpec
>> class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress
>> MetacelloProjectReferenceSpec
>> class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress
>> MetacelloProjectSpec
>> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloSpec
>> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloVersion
>> class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress GLMPresentation
>> class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag
>> class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag
>> class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress
>> GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick
>> class>>#gtExample->#EmbeddedSourceQCompress
>> GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress
>> GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress
>> GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress
>> GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples
>> class>>#l->#EmbeddedSourceQCompress GTDummyExamples
>> class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid
>> class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas
>> class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas
>> class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas
>> class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick
>> class>>#gtExample->#EmbeddedSourceQCompress FileReference
>> class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep
>> class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement
>> class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress
>> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress
>> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"
>>
>
> _,,,^..^,,,_
> best, Eliot
>

Re: [Pharo-dev] wrong method trailer kind

[Eliot Miranda]

Hi Nicolai,

On Fri, Feb 26, 2016 at 1:50 PM, Nicolai Hess  wrote:

> 17618
> 
> Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
> Interesting bug.
> someone who can tell me what exactly is this trailer kind and why it is
> based
> on some "flag" in "method at: method size".
>

There's a rich class comment in CompiledMethodTrailer which explains a lot,
but let me add a little.

Back in the day the source pointer in methods (the pointer that says which
of the two source files and where in the file a method's source is kept)
was stored in three bytes added onto the end of a CompiledMethod after its
endPC.  Then Dan Ingalls added the ability to not have source files at all
but just to have named temporary variables.  he added a compressed version
of the temp names in bytes tacked on at the end of a method, replacing the
source pointer.  IIRC the difference between a source pointer, no source
pointer, or a compressed version of the temp names was all encoded in the
last byte.

Round about 2009 Igor Stasenko did a really nice reimplementation of this
scheme where he factored out the encoding tricks into
CompiledMethodTrailer, allowing one to generalize the scheme and add new
encoding types, for a total of 256 different kinds of trailer.

(and if you already know all of this, forgive me for trying to teach you to
suck eggs)
Anyway this trailer is

CompiledMethodTrailer >>encodeEmbeddedSourceQCompress

"data is string with method's source code, encode it using qCompress method"
self encodeUsingQCompress

CompiledMethodTrailer >>decodeEmbeddedSourceQCompress

"data is string with method's source code, encoded using qCompress method"
self qDecompress.

HTH

And why it seems to be wrong for many GT-methods:
>
> (CompiledMethod allInstances select:[:m | (m at: m size) = 24])
> collect:[:k |
> k -> k trailer kind] "an Array(String
> class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable
> class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser
> class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag
> class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation
> class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress
> LiteralVariable
> class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress
> GTSpotterRecorderEvent
> class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress
> MetacelloAbstractPackageSpec
> class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress
> MetacelloProjectReferenceSpec
> class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress
> MetacelloProjectSpec
> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloSpec
> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloVersion
> class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress GLMPresentation
> class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag
> class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag
> class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress
> GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick
> class>>#gtExample->#EmbeddedSourceQCompress
> GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress
> GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress
> GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress
> GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples
> class>>#l->#EmbeddedSourceQCompress GTDummyExamples
> class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid
> class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick
> class>>#gtExample->#EmbeddedSourceQCompress FileReference
> class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement
> class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"
>

_,,,^..^,,,_
best, Eliot

Re: [Pharo-dev] wrong method trailer kind

[Tudor Girba]

I would be curious to find out as well :)

Doru


> On Feb 26, 2016, at 11:16 PM, Nicolai Hess  wrote:
> 
> It seems, the gt-Methods are actually methods not in any method dictionary. 
> And if I inspect the real methods from the method dictionary, that "flag" is 
> different.
> But I can not find any object pointing to this elements, and they arent 
> cleaned up with
> Smalltalk garbageCollect ...
> 
> 2016-02-26 22:50 GMT+01:00 Nicolai Hess :
> 17618 Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
> Interesting bug.
> someone who can tell me what exactly is this trailer kind and why it is based
> on some "flag" in "method at: method size".
> And why it seems to be wrong for many GT-methods:
> 
> (CompiledMethod allInstances select:[:m | (m at: m size) = 24]) collect:[:k | 
> k -> k trailer kind] "an Array(String 
> class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress 
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress 
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable 
> class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag 
> class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation 
> class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress 
> LiteralVariable 
> class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress 
> GTSpotterRecorderEvent class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress 
> MetacelloAbstractPackageSpec 
> class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress 
> MetacelloProjectReferenceSpec 
> class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress 
> MetacelloProjectSpec class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress 
> MetacelloSpec class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress 
> MetacelloVersion class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress 
> GLMPresentation class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag 
> class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag 
> class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress 
> GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick 
> class>>#gtExample->#EmbeddedSourceQCompress 
> GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress 
> GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress 
> GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress 
> GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples 
> class>>#l->#EmbeddedSourceQCompress GTDummyExamples 
> class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid 
> class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas 
> class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick 
> class>>#gtExample->#EmbeddedSourceQCompress FileReference 
> class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep 
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement 
> class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress 
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress 
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"
> 

--
www.tudorgirba.com
www.feenk.com

"Being happy is a matter of choice."

Re: [Pharo-dev] wrong method trailer kind

[Nicolai Hess]

It seems, the gt-Methods are actually methods not in any method dictionary.
And if I inspect the real methods from the method dictionary, that "flag"
is different.
But I can not find any object pointing to this elements, and they arent
cleaned up with
Smalltalk garbageCollect ...

2016-02-26 22:50 GMT+01:00 Nicolai Hess :

> 17618
> 
> Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
> Interesting bug.
> someone who can tell me what exactly is this trailer kind and why it is
> based
> on some "flag" in "method at: method size".
> And why it seems to be wrong for many GT-methods:
>
> (CompiledMethod allInstances select:[:m | (m at: m size) = 24])
> collect:[:k |
> k -> k trailer kind] "an Array(String
> class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress
> OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable
> class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser
> class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag
> class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation
> class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress
> LiteralVariable
> class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress
> GTSpotterRecorderEvent
> class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress
> MetacelloAbstractPackageSpec
> class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress
> MetacelloProjectReferenceSpec
> class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress
> MetacelloProjectSpec
> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloSpec
> class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloVersion
> class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress GLMPresentation
> class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag
> class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag
> class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress
> GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick
> class>>#gtExample->#EmbeddedSourceQCompress
> GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress
> GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress
> GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress
> GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples
> class>>#l->#EmbeddedSourceQCompress GTDummyExamples
> class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid
> class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas
> class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick
> class>>#gtExample->#EmbeddedSourceQCompress FileReference
> class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep
> class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement
> class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress
> UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"
>

[Pharo-dev] wrong method trailer kind

[Nicolai Hess]

17618

Failing test: ReleaseTest>>#testInstalledMethodsWithIncorrectTrailerKind
Interesting bug.
someone who can tell me what exactly is this trailer kind and why it is
based
on some "flag" in "method at: method size".
And why it seems to be wrong for many GT-methods:

(CompiledMethod allInstances select:[:m | (m at: m size) = 24]) collect:[:k
|
k -> k trailer kind] "an Array(String
class>>#gtInspectorFourtyTwo->#EmbeddedSourceQCompress
OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress
OSEnvironment>>#getEnv:->#EmbeddedSourceQCompress GlobalVariable
class>>#gtExampleSmalltalk->#EmbeddedSourceQCompress VirtualMachine
class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMBrowser
class>>#gtExampleBasic->#EmbeddedSourceQCompress RPackageTag
class>>#gtExamplePackageTag->#EmbeddedSourceQCompress Object
class>>#gtExampleBasic->#EmbeddedSourceQCompress GLMCompositePresentation
class>>#gtExampleCompositePresentation->#EmbeddedSourceQCompress
LiteralVariable
class>>#gtExampleUniqueLiteralVariable->#EmbeddedSourceQCompress
GTSpotterRecorderEvent
class>>#gtExampleAnySubclass->#EmbeddedSourceQCompress
MetacelloAbstractPackageSpec
class>>#gtExamplePackageSpec->#EmbeddedSourceQCompress
MetacelloProjectReferenceSpec
class>>#gtExampleProjectReferenceSpec->#EmbeddedSourceQCompress
MetacelloProjectSpec
class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloSpec
class>>#gtExampleMetacelloSpec->#EmbeddedSourceQCompress MetacelloVersion
class>>#gtExampleMetacelloVersion->#EmbeddedSourceQCompress GLMPresentation
class>>#gtExampleBasic->#EmbeddedSourceQCompress Bag
class>>#gtExampleBagWithTenElements->#EmbeddedSourceQCompress Bag
class>>#gtExampleBagWithOneElement->#EmbeddedSourceQCompress
GTDummyExamplesRecursive class>>#h->#EmbeddedSourceQCompress GLMAlertBrick
class>>#gtExample->#EmbeddedSourceQCompress
GTDummyExampleProvider>>#a->#EmbeddedSourceQCompress
GTDummyExampleProvider>>#b->#EmbeddedSourceQCompress
GTDummyExampleWithAssertions>>#a->#EmbeddedSourceQCompress
GTDummyExampleWithAssertions>>#b->#EmbeddedSourceQCompress GTDummyExamples
class>>#l->#EmbeddedSourceQCompress GTDummyExamples
class>>#o->#EmbeddedSourceQCompress GTDummyExamplesInvalid
class>>#a:->#EmbeddedSourceQCompress GTDummyExamplesPragmas
class>>#a->#EmbeddedSourceQCompress GTDummyExamplesPragmas
class>>#c->#EmbeddedSourceQCompress GTDummyExamplesPragmas
class>>#b->#EmbeddedSourceQCompress GLMCollapsableBrick
class>>#gtExample->#EmbeddedSourceQCompress FileReference
class>>#gtExampleText->#EmbeddedSourceQCompress GTSpotterStep
class>>#gtExampleBasic->#EmbeddedSourceQCompress GTEventAnnouncement
class>>#gtExampleEmptyAnnouncement->#EmbeddedSourceQCompress
UndefinedObject>>#DoIt->#EmbeddedSourceQCompress
UndefinedObject>>#DoIt->#EmbeddedSourceQCompress)"