My bad, I didn't notice there was no - at the beginning of 2 lines in the 
diff, so ignore what I wrote.
But, the rather unusual ifNil: didn't help noticing that either. I really 
think #ifNotNil: should be used there instead:

 	^(...) ifNotNil: [ ... ]


Levente

On Sun, 23 Feb 2020, Thiede, Christoph wrote:

> 
> The intended difference is that #browseVersionsOf: opens a VB on all versions of aCompiledMethod, whereas #browseMethod: selects aCompiledMethod by default. This is what #selectMethod: does.
> 
> 
> Do you think the initial selection does not matter?
> 
> 
> Best,
> 
> Christoph
> 
> _________________________________________________________________________________________________________________________________________________________________________________________________________________________________
> Von: Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im Auftrag von Levente Uzonyi <leves at caesar.elte.hu>
> Gesendet: Sonntag, 23. Februar 2020 19:40:47
> An: squeak-dev at lists.squeakfoundation.org
> Betreff: Re: [squeak-dev] The Inbox: Tools-ct.944.mcz  
> How about not adding #browseVersionsOf:, but chaging the
> body of #browseMethod: to what #browseVersionsOf: is below?
> 
> ^x ifNil: [ ^nil ] is the same as ^x but longer, isn't it?
> 
> 
> Levente
> 
> On Sun, 23 Feb 2020, commits at source.squeak.org wrote:
> 
> > Christoph Thiede uploaded a new version of Tools to project The Inbox:
> > http://source.squeak.org/inbox/Tools-ct.944.mcz
> >
> > ==================== Summary ====================
> >
> > Name: Tools-ct.944
> > Author: ct
> > Time: 23 February 2020, 5:50:43.489831 pm
> > UUID: 0c54eef3-3e82-1340-9426-3e94151157d6
> > Ancestors: Tools-mt.940
> >
> > Fixes a bug/unnecessary limitation in VersionsBrowser class >> #browseMethod: that raised an error when browsing a method that had been removed from the system.
> >
> > You can also reproduce it via: thisContext method browse "on a fresh image".
> >
> > =============== Diff against Tools-mt.940 ===============
> >
> > Item was changed:
> >  ----- Method: VersionsBrowser class>>browseMethod: (in category 'instance creation') -----
> >  browseMethod: aCompiledMethod
> >
> > +      ^ (self browseVersionsOf: aCompiledMethod)
> > +              ifNil: [^ nil];
> > -      ^ (self browseVersionsForClass: aCompiledMethod methodClass selector: aCompiledMethod selector)
> >                selectMethod: aCompiledMethod;
> >                yourself!
> >
> > Item was added:
> > + ----- Method: VersionsBrowser class>>browseVersionsOf: (in category 'instance creation') -----
> > + browseVersionsOf: aCompiledMethod
> > +
> > +      | methodClass methodSelector |
> > +      methodClass := aCompiledMethod methodClass.
> > +      methodSelector := aCompiledMethod selector.
> > +      ^ self
> > +              browseVersionsOf: aCompiledMethod
> > +              class: methodClass
> > +              meta: methodClass isMeta
> > +              category: (methodClass organization categoryOfElement: methodSelector)
> > +              selector: methodSelector!
> 
> 
>