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It causes spurious failures - a typical example:
[partest] testing: [...]/files/run/t6987.scala [FAILED]
[partest] did not get the string expected, full results were:
[partest] Fast Scala compiler version 2.11.0-20130126-111937-f01e001c77 -- Copyright 2002-2013, LAMP/EPFL
[partest] [Given arguments: -shutdown -verbose]
[partest] [Transformed arguments: -shutdown -verbose -current-dir /localhome/jenkins/b/workspace/scala-checkin-manual]
[partest] [VM arguments: ]
[partest] java.net.ConnectException: Connection refused
[partest] [Connecting to compilation daemon at port 32808 failed; re-trying...]
[partest] [No compilation server running.]
[partest]
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* origin/2.10.x:
SI-6969, mishandling of SoftReferences in method cache.
SI-7011 Fix finding constructor type in captured var definitions
SI-6987 Tests fsc verbose output
SI-6987 Fixes fsc compile server verbose output
SI-6231 Report unsupported free var capture by a trait.
SI-6666 Restrict hidden `this` access in self/super calls.
SI-6902 Check unreachability under @unchecked
SI-6976 Fix value class separate compilation crasher.
Closes SI-6952: add correct error positions for Dynamic feature check.
Conflicts:
src/compiler/scala/tools/nsc/CompileServer.scala
src/compiler/scala/tools/nsc/transform/ExtensionMethods.scala
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SI-7011 Fix finding constructor type in captured var definitions
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If a captured var was initialized with an empty tree then finding
the type of the empty tree was being handled improperly. The fix is
to look for primary constructors on the tree's type symbol rather than
the tree's symbol.
A test is included. In order to make the problem more testable the debug
logging of the issue is changed to a debug warn.
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SI-6231 Report unsupported free var capture by a trait.
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If a class nested in a trait captures a free variable from
the enclosing scope of the trait, the transformation to
add that variable to the `init` method of the trait
implementation class happens *after* the abstract trait
interface has been extracted. This would lead to a crash
when trying to find the corresponding interface method.
This commit detects this situation and reports an
implementation restriction. The enclosed test case
shows a workaround.
To lift this restriction, LambdaLifter should add the getters
and make sure they end up in the trait interface. Looks like
Martin tried this once:
// LambdaLift.scala
//
// Disabled attempt to to add getters to freeParams
// this does not work yet. Problem is that local symbols need local names
// and references to local symbols need to be transformed into
// method calls to setters.
// def paramGetter(param: Symbol): Tree = {
// val getter = param.newGetter setFlag TRANS_FLAG resetFlag PARAMACCESSOR // mark because we have to add them to interface
// sym.info.decls.enter(getter)
// val rhs = Select(gen.mkAttributedThis(sym), param) setType param.tpe
// DefDef(getter, rhs) setPos tree.pos setType NoType
// }
// val newDefs = if (sym.isTrait) freeParams ::: (ps map paramGetter) else freeParams
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SI-6987 Fixes fsc compile server verbose output
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This commit includes a test of fsc's verbose output. In order for it
to work, CompileServer's main method had to be modified to remove a
sys exit 0 at the end. It was redundant and made testing a bit harder.
In order to prevent a race condition between server and client start
up, this commit also adds a server callback that decrements a
CountDownLatch that the main testing thread waits for.
Finally, the server had to be modified to use Console.withErr
and Console.withOut instead of mutating the global System.err
and System.out variables. Otherwise the test would be unreliable.
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SI-6666 Restrict hidden `this` access in self/super calls.
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Detect when classes (user authored or compiler generated)
local to a self or super constructor argument would require
premature access to the in-construction instance.
The same restriction applies for classes and objects; for objects,
the premature access would result in a null via MODULE$ field.
A residual error has been lodged as SI-6997.
I'd like to remove calls to `Symbol#outerClass` (which relies on
the flaky flag INCONSTRUCTOR, see my comments in the JIRA issue
for more discussion) from `LambdaLift` and `ExplicitOuter`, and
instead use the stack of active self/super calls to know when to
skip an enclosing class. That will obviate that flag.
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SI-6902 Check unreachability under @unchecked
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Only exhaustiveness checking should be disabled if the
scrutinee of a match as annotated as `: @unchecked`.
This was the pre-2.10.x behaviour.
This also fixes a variation of the closed ticket,
SI-6011. The exhaustiveness check is needed to
safely fallback from emitting a table switch if
duplicate cases are detected.
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Closes SI-6952: add correct error positions for Dynamic feature check.
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SI-6969, mishandling of SoftReferences in method cache.
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More interesting to test than it was to fix. The soft
reference is now dereferenced once, the locally stored
underlying value ascertained to be non-null, and the
remainder of the references to the value use the local var.
The enclosed test reliably NPEs without this patch.
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SI-6976 Fix value class separate compilation crasher.
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We can't guarantee that the owner of the value class
is initialized, and if it isn't, the search for the
companion module will turn up bubkis.
This is a localized fix, but I'd be suprised if there
weren't other places that suffered from the same problem.
Wouldn't it be nicer to have something like:
// doesn't force info
sym.raw.info
sym.raw.companionModule
// forces info
sym.info
sym.companionModule
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Conflicts:
test/partest
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Use the same default scalac options in all three partest frontends
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Make ConsoleRunner, AntRunner and SBTRunner take scalac options from
"partest.scalac_opts" property.
Also remove leftover "-deprecation" option from test/partest.
The change to SBTRunner was not tested as sbt test is currently broken.
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[backport] Fix SI-6637 (misoptimization in erasure)
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commit f9ef5300ab561628e53c654df9000c75f488d74a
Author: Jan Niehusmann <jan@gondor.com>
Date: Fri Nov 9 15:05:58 2012 +0100
Fix SI-6637 (misoptimization in erasure)
Move the optimization one level deeper so the expression
being tested with isInstanceOf is always evaluated.
(cherry picked from commit b540aaee4ba30e2dd980456a44e8c6d732222df1)
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[backport] Fix unsafe array opt. / opt. primitive Array(...)
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SI-6611, SI-6247 (partial fix)
The original commits on master were a bit circuitous, this
is squashed to a neat little package.
I had to add type arguments to the Array.apply calls in the
test case, they are inferred on master.
commit 41ff05dfdbcf032157b3509ace633f2e7a12295c
Author: Jason Zaugg <jzaugg@gmail.com>
Date: Sun Nov 4 14:44:59 2012 +0100
Refactor guards checking for a particular overload of Array.apply.
(cherry picked from commit 092345a24c22a821204fb358d33272ae8f7353be)
commit 1e5c942deccaf64f8d57bd8891b912381d7f220a
Author: Jason Zaugg <jzaugg@gmail.com>
Date: Sun Nov 4 14:17:25 2012 +0100
Expand optimization of Array(e1, ..., en) to primitive arrays.
(cherry picked from commit 8265175ecc42293997d59049f430396c77a2b891)
commit ab1bf77e39f2dfeacf3fc107ccb2907a1867f04c
Author: Jason Zaugg <jzaugg@gmail.com>
Date: Sat Nov 3 13:34:20 2012 +0100
SI-6611 Tighten up an unsafe array optimization
The net was cast too wide and was unsafely optimizing away array
copies.
(cherry picked from commit dad886659faca4fba2d4937c9bc6780591b02c27)
And also:
Optimize primitive Array(e1, ..., en)
Expands an existing optimization for reference arrays to
apply to primitives, as well.
Fixes one aspect of SI-6247.
(cherry picked from commit cac5a08611f9511ba4d94b99db630404efae190a)
Conflicts:
src/compiler/scala/tools/nsc/transform/CleanUp.scala
More principled tree copying.
Canonical > home-spun.
Conflicts:
src/compiler/scala/tools/nsc/transform/CleanUp.scala
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[backport] SI-6567 Warning for Option(implicitView(foo))
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commit 284bd754fa5dfc8bc626b0c5ebe85d872dd044cb
Author: Jason Zaugg <jzaugg@gmail.com>
Date: Sat Nov 3 16:19:46 2012 +0100
SI-6567 Warning for Option(implicitView(foo))
I've seen the reported problem before in the wild. It seems
worthy of a special warning, so long as we advocate Option.apply
as an alternative to `if (x == null) Some(x) else None`.
It is behind -Xlint at the moment, an option that could do with
some promotion.
(cherry picked from commit 0bcb9e9169146e3f589c6c9f65cc4a5523b78120)
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* commit 'ac432bcde6':
Fix broken build.
SI-6434 Pretty print function types with by name arg as (=> A) => B
Removed class files.
SI-6994 Avoid spurious promiscuous catch warning
Addressing warnings.
SI-6439 Avoid spurious REPL warnings about companionship
use ArrayBuffer instead of Array to build Formulae
SI-6942 more efficient unreachability analysis
use Constant::isIntRange even if it's NIH
SI-6956 determine switchability by type, not tree
SI-5568 Comment improvements for getClass on primitive intersection.
SI-5568 Fixes verify error from getClass on refinement of value type
SI-6923 Context now buffers warnings as well as errors
Conflicts:
src/compiler/scala/tools/nsc/interpreter/IMain.scala
src/compiler/scala/tools/nsc/transform/Erasure.scala
src/compiler/scala/tools/nsc/typechecker/Contexts.scala
src/compiler/scala/tools/nsc/typechecker/Typers.scala
test/files/neg/t4851.check
Note:
This merge excludes b07228aebe7a as it breaks master.
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SI-6439 Avoid spurious REPL warnings about companionship
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`val m` isn't a companion of `trait m`, check the pair of
eponymous symbols are a ((class|trait), object) pair before
emitting the warning.
In order to correctly check this one a type alias is involved,
`definedSymbols` must avoid normalizing through type aliases.
AFAICT this is an improvement to the other clients of that Map,
one such power mode progression is demonstrated at the end
of the test case.
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SI-6994 Avoid spurious promiscuous catch warning
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It was being issued upon re-typechecking of a transformed
tree. Now we disable the warning post-typer.
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It's all system admin, all the time, here at scala ranch.
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We were pretty printing a function type with one by name arg as
=> A => B, but because => is right associative that's formally
equivalent to => (A => B) and that's entirely a different thing. This
commit changes the pretty printer in Typers.scala to check for a
byname argument on a function type and wrap it in parens. A REPL test
is included.
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Someone checked in a pair of .class files.
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SI-6942 more efficient CNF conversion in patmat analysis
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Avoid blowing the stack/the analysis budget by more eagerly translating
the propositions that model matches to CNF.
First building a large proposition that represents the match,
and then converting to CNF tends to blow the stack.
Luckily, it's easy to convert to CNF as we go.
The optimization relies on `CNF(P1 /\ ... /\ PN) == CNF(P1) ++ CNF(...) ++ CNF(PN)`:
Normalizing a conjunction of propositions
yields the same formula as
concatenating the normalized conjuncts.
CNF conversion is expensive for large propositions,
so we push it down into the conjunction and
then concatenate the resulting arrays of clauses (which is cheap).
(CNF converts a free-form proposition into an `Array[Set[Lit]]`, where:
- the Array's elements are /\'ed together;
- and the Set's elements are \/'ed;
- a Lit is a possibly negated variable.)
NOTE:
- removeVarEq may throw an AnalysisBudget.Exception
- also reworked the interface used to build formula,
so that we can more easily plug in SAT4J when the time comes
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SI-5568 Fixes verify error from getClass on refinement of value type
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Based on code review here are a few comment cleanups and the removal of
some dead test code.
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().asInstanceOf[AnyRef with Unit].getClass and
5.asInstanceOf[AnyRef with Int].getClass would cause a verify
error. Going the other way, i.e. [Unit with AnyRef] or [Int with AnyRef]
worked fine. This commit fixes it that both directions work out to
BoxedUnit or java.lang.Integer.
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SI-6601 Publicise derived value contstructor after pickler
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Otherwise the access restrictions are not enforced under
separate compilation.
See also SI-6608.
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SI-6923 Context now buffers warnings as well as errors
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Code that was silently typed would not report warnings, even if it
returned a successful result.
This appeared in the following code which didn't show warnings even
with -Ywarn-adapted-args:
def foo(a: Any) = a; foo(1, 2)
While the following would show the expected warning:
def foo[A](a: Any) = a; foo(1, 2)
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SI-6956 determine switchability by type, not tree
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Constant folding will set the type of a constant tree
to `ConstantType(Constant(folded))`, while the tree
itself can be many different things (in casu, an Ident).
We used to look at the tree directly when deciding whether
to emit a switch. Now we look at the tree's type. VoilĂ .
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This reverts commit 0a25ee3431d0314c782dd2e6620bc75c4de0d1a4.
It came with a test failure which I overlooked.
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SI-5824 Fix crashes in reify with _*
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Reification crashes if "foo: _*" construct is used. This happens besause type tree is represented either with TypeTree, or with Ident (present case), and `toPreTyperTypedOrAnnotated' only matches of the former. The fix is to cover the latter too. A test is included.
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Small terminology change aimed at improving inclusion.
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