Scala 2.10.0 Milestone 5

A new milestone release [1] for Scala is available. This release is cut directly from current development and is not intended for production environments, but is a great chance to try out the up and coming features for Scala 2.10.0. The milestone 2.10.0-M5 includes many fixes and improvements, listed below.

Improvements included in 2.10.0-M5:

new, faster, backend enabled by default (emitting 1.5 classfiles unless -target:jvm-1.6 or -target:jvm-1.7 is specified)
Scaladoc pages now contain inheritance diagrams for classes and traits and content diagrams for packages. Look for “Type Hierarchy” and “Content Hierarchy” on the scaladoc page header (-diagrams is the flag to generate diagrams and you need the graphviz package installed)

Here's a list of isssues that have been fixed since v2.10.0-M4:

Issue(s)	Commit	Message
SI-3836 [2]	ddcb351a2e [3]	Fix SI-3836 not-really-ambiguous import detection.
SI-6008 [4]	b61b5fffb6 [5]	SI-6008 use static knowledge of success of type tests
SI-4691 [6]	8234ba3905 [7]	SI-4691 exhaustivity: `unapply: Some` = irrefutable
SI-5907 [8], SI-5009 [9]	6c7f2b6460 [10]	SI-5907, SI-5009 case-class copy defaults only for first param list
SI-5959 [11], SI-5959 [11]	0529dd502a [12]	SI-5959 type equality now accounts for mirrors
SI-6013 [13]	1a2ec87c09 [14]	SI-6013 Disallow deferred members from intermediate java parents.
SI-5969 [15]	12b72485d8 [16]	Closes SI-5969.
SI-5780 [17]	c410b57d55 [18]	Diagram tweaks #2
SI-5212 [19]	c85b4a4956 [20]	Scaladoc class diagrams part 2
SI-6007 [21]	96dd73146f [22]	reify no longer dealiases symbols and types
SI-5929 [23]	59300ee6e3 [24]	Fix SI-5929 - Verify error with finally and pattern match
SI-5489 [25]	ad51d82953 [26]	SI-5489 Avoid accidentally adding members to Object in erasure.
SI-5932 [27]	8f640e8a1d [28]	SI-5932 Tone down non-sensible == warning with refinements.
SI-5967 [29], SI-4176 [30]	d9d5dcd1e2 [31]	SI-4176 A repeat dose of repeated parameter type sanitization.
SI-3326 [32]	5362f3df48 [33]	Fix SI-3326.
SI-5986 [34]	788ac75021 [35]	Fix SI-5986.
SI-5971 [36]	ba542ba608 [37]	Fix SI-5971.
SI-5148 [38]	175d8714e3 [39]	Closes SI-5148.
SI-2796 [40]	ac71812170 [41]	SI-2796 Warn if early definitions are used with a trait.
SI-5189 [42]	552ee9cc54 [43]	better fix for SI-5189 pt1
SI-5968 [44]	c27e5f0d60 [45]	SI-5968 Eliminate spurious exhaustiveness warning with singleton types.
SI-5610 [46], SI-5966 [47]	4736897ad2 [48]	SI-5966 Fix eta expansion for repeated parameters with zero arguments.
SI-5284 [49]	b29c01b710 [50]	Fix SI-5284.
SI-2807 [51]	7d8527b40a [52]	SI-2807 Resurrect and refine the promiscuous catch warning.
SI-5951 [53]	a2d1b23dbe [54]	adds `narrow` to the reflection API
SI-5953 [55]	47fad25adb [56]	Fix for SI-5953, extension methods crasher.
SI-4541 [57]	a83586a481 [58]	Fix SI-4541.
SI-4954 [59]	da7235afe8 [60]	Fix SI-4954.
SI-4842 [61]	6aa5762fa0 [62]	SI-4842 Forbid access to in-construction this in self-constructor args
SI-4989 [63]	72ee06de4c [64]	SI-4989 Reject super.x if an intermediate class declares x abstract.
SI-5617 [65]	2d3b6bd321 [66]	SI-5617 Better error message for "x overrides nothing".
SI-5910 [67]	5a8b937510 [68]	Fix for java parser edge case.
SI-5212 [19]	fba4098ca5 [69]	Scaladoc class diagrams part 2
SI-4270 [70]	d3393306e3 [71]	SI-4270 Refactor for efficiency and clarity.
SI-4270 [70]	9129cfe911 [72]	SI-4270 Disqualify in scope implicits that are shadowed.
SI-4270 [70]	0dea3d5a05 [73]	SI-4270 Rename implicits to avoid name clashes.

Special thanks to all the contributors!

#	Author
14	Jason Zaugg
11	Vlad Ureche
10	Paul Phillips
9	Iulian Dragos
9	Eugene Burmako
7	Adriaan Moors
6	Aleksandar Prokopec
3	Josh Suereth
2	Havoc Pennington
2	Martin Odersky
2	Damien
2	Hubert Plociniczak
2	phaller
1	Vojin Jovanovic
1	Lukas Rytz

Complete commit list!

sha	Title
34ce72f363 [74]	Revert "GenASM: pipeline disk-write with building of classfiles"
4496c5daa9 [75]	Collection of updates to SIP-14 (scala.concurrent)
946f51c8d8 [76]	Eliminated some code in asSeenFrom.
ddcb351a2e [3]	Fix SI-3836 not-really-ambiguous import detection.
b61b5fffb6 [5]	SI-6008 use static knowledge of success of type tests
8234ba3905 [7]	SI-4691 exhaustivity: `unapply: Some` = irrefutable
54b26064d9 [77]	introduce -Ypatmat-debug (no new functionality)
6c7f2b6460 [10]	SI-5907, SI-5009 case-class copy defaults only for first param list
3e9763a3ba [78]	Adds `Type.resultType` to reflection API
0529dd502a [12]	SI-5959 type equality now accounts for mirrors
1a2ec87c09 [14]	SI-6013 Disallow deferred members from intermediate java parents.
12b72485d8 [16]	Closes SI-5969.
98a5714fed [79]	The `reflect` project now depends on the `scala-library` project.
c410b57d55 [18]	Diagram tweaks #2
f8cb1aee92 [80]	Diagram tweaks #1
f8057d2223 [81]	Documented SyncVar
c85b4a4956 [20]	Scaladoc class diagrams part 2
fba65513d1 [82]	Scaladoc class diagrams part 1
c11427c13e [83]	Reorganized scaladoc model
44ec110bf0 [84]	Scaladoc diff-firendly output
96dd73146f [22]	reify no longer dealiases symbols and types
3becbd55af [85]	removes ClassTag.String and TypeTag.String
59300ee6e3 [24]	Fix SI-5929 - Verify error with finally and pattern match
cba0cbb892 [86]	Improves backward compatibility of manifests
ad51d82953 [26]	SI-5489 Avoid accidentally adding members to Object in erasure.
39f01d4f48 [87]	Fix for exponential compile time in specialization.
8f640e8a1d [28]	SI-5932 Tone down non-sensible == warning with refinements.
d9d5dcd1e2 [31]	SI-4176 A repeat dose of repeated parameter type sanitization.
5362f3df48 [33]	Fix SI-3326.
788ac75021 [35]	Fix SI-5986.
ba542ba608 [37]	Fix SI-5971.
1a3976fc82 [88]	Revert pull request #720 (CPS: enable return expressions in CPS code if they are in tail position)
22834ee32e [89]	make tests independent of compiler api
175d8714e3 [39]	Closes SI-5148.
ac71812170 [41]	SI-2796 Warn if early definitions are used with a trait.
3601b34fb7 [90]	exhaust unit: consider Unit as sealed
552ee9cc54 [43]	better fix for SI-5189 pt1
21814b53e9 [91]	minor cleanup in patmat and typers
fd6573a2ce [92]	Added new project files for using the compiler and library inside Eclipse and removed the old ones.
1d67fe63b8 [93]	Statistics improvements and bug fixes.
bb0f5d9ca7 [94]	Added a key comment.
c27e5f0d60 [45]	SI-5968 Eliminate spurious exhaustiveness warning with singleton types.
4736897ad2 [48]	SI-5966 Fix eta expansion for repeated parameters with zero arguments.
7527979be7 [95]	Don't swallow `Throwables` while parsing bytecode. Print a warning and go on.
b29c01b710 [50]	Fix SI-5284.
93d8af58fb [96]	Making Actor Migration Tests deterministic.
7d8527b40a [52]	SI-2807 Resurrect and refine the promiscuous catch warning.
a2d1b23dbe [54]	adds `narrow` to the reflection API
47fad25adb [56]	Fix for SI-5953, extension methods crasher.
10b44339c5 [97]	Updated scalacheck sources.
8284486a15 [98]	Statistics reorganization
3be520bcfc [99]	improves showRaw
a83586a481 [58]	Fix SI-4541.
de65199525 [100]	Fixes from review.
f559505c1f [101]	Adding copyInto and toVector methods to collections.
da7235afe8 [60]	Fix SI-4954.
6167ec678e [102]	Revert "Scaladoc class diagrams part 1"
55348f7a44 [103]	Revert "Scaladoc class diagrams part 2"
ec2082c616 [104]	Revert "Documented SyncVar"
6aa5762fa0 [62]	SI-4842 Forbid access to in-construction this in self-constructor args
72ee06de4c [64]	SI-4989 Reject super.x if an intermediate class declares x abstract.
2d3b6bd321 [66]	SI-5617 Better error message for "x overrides nothing".
ebf00a8a27 [105]	exposes extra tests for symbols as discussed on reflection meeting
52c08914ed [106]	Remove unused type parameter.
17d35b4d4a [107]	fastlocker target for ant
5a8b937510 [68]	Fix for java parser edge case.
4c6522bab7 [108]	Fix for broken forwarder.
796024c742 [109]	CPS: enable return expressions in CPS code if they are in tail position
6dd90d349d [110]	Adding JDK7 friendly build with new partialdist(-opt) tasks.
556065151c [111]	Documented SyncVar
fba4098ca5 [69]	Scaladoc class diagrams part 2
831f09bb6d [112]	Scaladoc class diagrams part 1
d3393306e3 [71]	SI-4270 Refactor for efficiency and clarity.
a3d3a53529 [113]	rework Future.dispatchFuture a bit to fix bugs / optimize
eaa3dd57f1 [114]	Remove NPE when `compileLate` sees sources during initialization.
f4d2678c42 [115]	Don't require symbols to be loaded in the parser.
fdca21eb13 [116]	Don't use the BrowsingLoader for Java sources.
120766fa33 [117]	Don't crash if cpsParam is not on the classpath.
039d826e99 [118]	Suppress non-local return unchecked warnings.
9129cfe911 [72]	SI-4270 Disqualify in scope implicits that are shadowed.
0dea3d5a05 [73]	SI-4270 Rename implicits to avoid name clashes.

Links:
[1] http://www.scala-lang.org/downloads#Milestones
[2] https://issues.scala-lang.org/browse/SI-3836
[3] https://github.com/scala/scala/commit/ddcb351a2e
[4] https://issues.scala-lang.org/browse/SI-6008
[5] https://github.com/scala/scala/commit/b61b5fffb6
[6] https://issues.scala-lang.org/browse/SI-4691
[7] https://github.com/scala/scala/commit/8234ba3905
[8] https://issues.scala-lang.org/browse/SI-5907
[9] https://issues.scala-lang.org/browse/SI-5009
[10] https://github.com/scala/scala/commit/6c7f2b6460
[11] https://issues.scala-lang.org/browse/SI-5959
[12] https://github.com/scala/scala/commit/0529dd502a
[13] https://issues.scala-lang.org/browse/SI-6013
[14] https://github.com/scala/scala/commit/1a2ec87c09
[15] https://issues.scala-lang.org/browse/SI-5969
[16] https://github.com/scala/scala/commit/12b72485d8
[17] https://issues.scala-lang.org/browse/SI-5780
[18] https://github.com/scala/scala/commit/c410b57d55
[19] https://issues.scala-lang.org/browse/SI-5212
[20] https://github.com/scala/scala/commit/c85b4a4956
[21] https://issues.scala-lang.org/browse/SI-6007
[22] https://github.com/scala/scala/commit/96dd73146f
[23] https://issues.scala-lang.org/browse/SI-5929
[24] https://github.com/scala/scala/commit/59300ee6e3
[25] https://issues.scala-lang.org/browse/SI-5489
[26] https://github.com/scala/scala/commit/ad51d82953
[27] https://issues.scala-lang.org/browse/SI-5932
[28] https://github.com/scala/scala/commit/8f640e8a1d
[29] https://issues.scala-lang.org/browse/SI-5967
[30] https://issues.scala-lang.org/browse/SI-4176
[31] https://github.com/scala/scala/commit/d9d5dcd1e2
[32] https://issues.scala-lang.org/browse/SI-3326
[33] https://github.com/scala/scala/commit/5362f3df48
[34] https://issues.scala-lang.org/browse/SI-5986
[35] https://github.com/scala/scala/commit/788ac75021
[36] https://issues.scala-lang.org/browse/SI-5971
[37] https://github.com/scala/scala/commit/ba542ba608
[38] https://issues.scala-lang.org/browse/SI-5148
[39] https://github.com/scala/scala/commit/175d8714e3
[40] https://issues.scala-lang.org/browse/SI-2796
[41] https://github.com/scala/scala/commit/ac71812170
[42] https://issues.scala-lang.org/browse/SI-5189
[43] https://github.com/scala/scala/commit/552ee9cc54
[44] https://issues.scala-lang.org/browse/SI-5968
[45] https://github.com/scala/scala/commit/c27e5f0d60
[46] https://issues.scala-lang.org/browse/SI-5610
[47] https://issues.scala-lang.org/browse/SI-5966
[48] https://github.com/scala/scala/commit/4736897ad2
[49] https://issues.scala-lang.org/browse/SI-5284
[50] https://github.com/scala/scala/commit/b29c01b710
[51] https://issues.scala-lang.org/browse/SI-2807
[52] https://github.com/scala/scala/commit/7d8527b40a
[53] https://issues.scala-lang.org/browse/SI-5951
[54] https://github.com/scala/scala/commit/a2d1b23dbe
[55] https://issues.scala-lang.org/browse/SI-5953
[56] https://github.com/scala/scala/commit/47fad25adb
[57] https://issues.scala-lang.org/browse/SI-4541
[58] https://github.com/scala/scala/commit/a83586a481
[59] https://issues.scala-lang.org/browse/SI-4954
[60] https://github.com/scala/scala/commit/da7235afe8
[61] https://issues.scala-lang.org/browse/SI-4842
[62] https://github.com/scala/scala/commit/6aa5762fa0
[63] https://issues.scala-lang.org/browse/SI-4989
[64] https://github.com/scala/scala/commit/72ee06de4c
[65] https://issues.scala-lang.org/browse/SI-5617
[66] https://github.com/scala/scala/commit/2d3b6bd321
[67] https://issues.scala-lang.org/browse/SI-5910
[68] https://github.com/scala/scala/commit/5a8b937510
[69] https://github.com/scala/scala/commit/fba4098ca5
[70] https://issues.scala-lang.org/browse/SI-4270
[71] https://github.com/scala/scala/commit/d3393306e3
[72] https://github.com/scala/scala/commit/9129cfe911
[73] https://github.com/scala/scala/commit/0dea3d5a05
[74] https://github.com/scala/scala/commit/34ce72f363
[75] https://github.com/scala/scala/commit/4496c5daa9
[76] https://github.com/scala/scala/commit/946f51c8d8
[77] https://github.com/scala/scala/commit/54b26064d9
[78] https://github.com/scala/scala/commit/3e9763a3ba
[79] https://github.com/scala/scala/commit/98a5714fed
[80] https://github.com/scala/scala/commit/f8cb1aee92
[81] https://github.com/scala/scala/commit/f8057d2223
[82] https://github.com/scala/scala/commit/fba65513d1
[83] https://github.com/scala/scala/commit/c11427c13e
[84] https://github.com/scala/scala/commit/44ec110bf0
[85] https://github.com/scala/scala/commit/3becbd55af
[86] https://github.com/scala/scala/commit/cba0cbb892
[87] https://github.com/scala/scala/commit/39f01d4f48
[88] https://github.com/scala/scala/commit/1a3976fc82
[89] https://github.com/scala/scala/commit/22834ee32e
[90] https://github.com/scala/scala/commit/3601b34fb7
[91] https://github.com/scala/scala/commit/21814b53e9
[92] https://github.com/scala/scala/commit/fd6573a2ce
[93] https://github.com/scala/scala/commit/1d67fe63b8
[94] https://github.com/scala/scala/commit/bb0f5d9ca7
[95] https://github.com/scala/scala/commit/7527979be7
[96] https://github.com/scala/scala/commit/93d8af58fb
[97] https://github.com/scala/scala/commit/10b44339c5
[98] https://github.com/scala/scala/commit/8284486a15
[99] https://github.com/scala/scala/commit/3be520bcfc
[100] https://github.com/scala/scala/commit/de65199525
[101] https://github.com/scala/scala/commit/f559505c1f
[102] https://github.com/scala/scala/commit/6167ec678e
[103] https://github.com/scala/scala/commit/55348f7a44
[104] https://github.com/scala/scala/commit/ec2082c616
[105] https://github.com/scala/scala/commit/ebf00a8a27
[106] https://github.com/scala/scala/commit/52c08914ed
[107] https://github.com/scala/scala/commit/17d35b4d4a
[108] https://github.com/scala/scala/commit/4c6522bab7
[109] https://github.com/scala/scala/commit/796024c742
[110] https://github.com/scala/scala/commit/6dd90d349d
[111] https://github.com/scala/scala/commit/556065151c
[112] https://github.com/scala/scala/commit/831f09bb6d
[113] https://github.com/scala/scala/commit/a3d3a53529
[114] https://github.com/scala/scala/commit/eaa3dd57f1
[115] https://github.com/scala/scala/commit/f4d2678c42
[116] https://github.com/scala/scala/commit/fdca21eb13
[117] https://github.com/scala/scala/commit/120766fa33
[118] https://github.com/scala/scala/commit/039d826e99