Eliot Miranda uploaded a new version of System to project The Trunk:
http://source.squeak.org/trunk/System-eem.834.mcz

==================== Summary ====================

Name: System-eem.834
Author: eem
Time: 23 June 2016, 4:30:25.198834 pm
UUID: d42d7b14-27ee-49c9-9469-b7f7d1b48395
Ancestors: System-mt.833

More accurately comment the semantics of the growMemoryByAtLeast: primitive on Spur.

=============== Diff against System-mt.833 ===============

Item was changed:
  ----- Method: SmalltalkImage>>growMemoryByAtLeast: (in category 'memory space') -----
  growMemoryByAtLeast: numBytes
  	"Grow memory by at least the requested number of bytes.
+ 	 Primitive.  Fail if no memory is available.  Essential.
+ 	 N.B. In Spur, the heap is composed of segments. Growing memory adds a new
+ 	 segment; it does not extend existing segments. Growth is by at least that
+ 	 established by SmalltalkImage current vmParameterAt: 25, which defaults to 16Mb."
- 	 Primitive.  Essential. Fail if no memory is available."
  	<primitive: 180>
+ 	^(numBytes isInteger and: [numBytes > 0])
+ 		ifTrue: [OutOfMemory signal]
+ 		ifFalse: [self primitiveFailed]!
- 	(numBytes isInteger and: [numBytes > 0]) ifTrue:
- 		[OutOfMemory signal].
- 	^self primitiveFailed!

Item was changed:
  ----- Method: SystemDictionary>>growMemoryByAtLeast: (in category 'memory space') -----
  growMemoryByAtLeast: numBytes
  	"Grow memory by at least the requested number of bytes.
+ 	 Primitive.  Fail if no memory is available.  Essential.
+ 	 N.B. In Spur, the heap is composed of segments. Growing memory adds a new
+ 	 segment; it does not extend existing segments. Growth is by at least that
+ 	 established by SmalltalkImage current vmParameterAt: 25, which defaults to 16Mb."
- 	 Primitive.  Fail if no memory is available.  Essential."
  	<primitive: 180>
  	^(numBytes isInteger and: [numBytes > 0])
  		ifTrue: [OutOfMemory signal]
  		ifFalse: [self primitiveFailed]!