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Go back to using globalError to report when a stub's info is referenced,
and only throw the MissingRequirementError when compilation really
must abort due to having a StubTermSymbol in a place where a
StubClassSymbol would have been a better choice.
This situation arises when an entire package is missing from the
classpath, as was the case in the reported bug.
Adds `StoreReporterDirectTest`, which buffers messages issued
during compilation for more structured interrogation. Use this
in two test for manifests -- these tests were using a crude means
of grepping compiler console output to focus on the relevant output,
but this approach was insufficient with the new multi-line error
message emitted as part of this change.
Also used that base test class to add two new tests: one for
the reported error (package missing), and another for a simpler
error (class missing). The latter test shows how stub symbols
allow code to compile if it doesn't the subset of signatures
in some type that refer to a missing class.
Gave the INFO/WARNING/ERROR members of Reporter sensible
toString implementations; they inherit from Enumeration#Value
in an unusual manner (why?) that means the built in toString of
Enumeration printed `Severity@0`.
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- To force a failure of the stub, call a new method `failIfStub`
rather than `info`.
- Offer a broader range of potential root causes in the
error message.
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In a55788e, StubSymbols were introduced to fail-slow when
the classpath was deficient. This allowed compilation to
succeed in cases when one didn't actually use the part of
class A which referred to some missing class B.
But a few problems were introduced.
Firstly, when the deferred error eventually happened, it was
signalled with abort(msg), rather than through a thrown
MissingRequirementError. The latter is desirable, as it doesn't
lead to printing a stack trace.
Second, the actual error message changed, and no longer
included the name of the class file that refers to the missing
class.
Finally, it seems that we can end up with a stub term symbol
in a situation where a class symbol is desired. An assertion
in the constructor of ThisType throws trips when calling .isClass,
before the useful error message from StubSymbol can be emitted.
This commit addresses these points, and rewords the error
a little to be more accessible. The last point is the most fragile
in this arrangement, there might be some whack-a-mole
required to find other places that also need this.
I don't see a clean solution for this, but am open to suggestions.
We should really build a facility in partest to delete
specified classfiles between groups in separate compilation
tests, in order to have tests for this. I'll work on that as a followup.
For now, here's the result of my manual testing:
[info] Set current project to default-821d14 (in build file:/Users/jason/code/scratch1/)
> compile
[info] Compiling 1 Scala source to /Users/jason/code/scratch1/target/scala-2.10/classes...
[error]
[error] while compiling: /Users/jason/code/scratch1/test.scala
[error] during phase: typer
[error] library version: version 2.10.0-RC2
[error] compiler version: version 2.10.0-RC2
...
[error] last tree to typer: Ident(SwingWorker)
[error] symbol: <none> (flags: )
[error] symbol definition: <none>
[error] symbol owners:
[error] context owners: object Test -> package <empty>
...
[error] uncaught exception during compilation: java.lang.AssertionError
[trace] Stack trace suppressed: run last compile:compile for the full output.
[error] (compile:compile) java.lang.AssertionError: assertion failed: value actors
[error] Total time: 2 s, completed Nov 10, 2012 3:18:34 PM
>
> set scalaHome := Some(file("/Users/jason/code/scala/build/pack"))
[info] Defining *:scala-home
[info] The new value will be used by no settings or tasks.
[info] Reapplying settings...
[info] Set current project to default-821d14 (in build file:/Users/jason/code/scratch1/)
^[compile
[info] Compiling 1 Scala source to /Users/jason/code/scratch1/target/scala-2.10/classes...
[error] /Users/jason/code/scratch1/test.scala:4: A signature in SwingWorker.class refers to term actors in package scala which is missing from the classpath.
[error] object Test extends SwingWorker
[error] ^
[error] one error found
[error] (compile:compile) Compilation failed
[error] Total time: 2 s, completed Nov 10, 2012 3:18:45 PM
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SI-6624 better lookup of case field accessors for case class pattern with complicated type
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sometimes the type checker infers a weird type for a sub-pattern of a case class/extractor pattern
this confuses the pattern matcher and it can't find the case field accessors for the sub-pattern
use the expected argument type of the extractor corresponding to the case class that we're matching
as the info for the sub-pattern binder -- this type more readily admits querying its caseFieldAccessors
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Fixes SI-6628, Revert "Fix for view isEmpty."
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This reverts commit caf7eb6b56817fd1e1fbc1cf017f30e6f94c6bea.
I don't have a better idea right now than wholesale reversion.
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SI-6559 Fix raw string interpolator: string parts which were after the first argument were still escaped
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As reported by Curtis Stanford, with indication of what to fix. standardInterpolator was not correctly
calling the passed in process function, so raw strings were not really raw.
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argument were still escaped
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SI-6648 copyAttrs must preserve TypeTree#wasEmpty
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This field tracks whether the type is an inferred
on, subject to removal in `resetAttrs`, or an explicit
type, which must remain.
In ae5ff662, `ResetAttrs` was modified to duplicate
trees, rather than mutate trees in place. But the
tree copier didn't pass `wasEmpty` on to the new tree,
which in turn meant that the subsequent typing run
on the tree would not re-infer the types. If the
type refers to a local class, e.g. the anonymous
function in the enclosed test case, the reference
to the old symbol would persist.
This commit overrides `copyAttrs` in TypeTree to
copy `wasEmpty`.
We might consider representing this as a tree
attachment, but this would need to be validated
for the performance impact.
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SI-6661 - Remove obsolete implicit parameter of scala.concurrent.promise method
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Clarification of @heathermiller:
This is an inconsistency introduced after refactoring implicit ExecutionContexts.
In commit 1dfce90246f7d334 the implicit ExecutionContexts were removed from everything else in Promise.scala,
but it appears that method promise was missed in the scala.concurrent package object, which would've made
sense to remove back then.
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SI-6023 reify abstract vals
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Type trees created by MethodSynthesis for abstract val getters carry symless originals,
which are unusable for reification purposes
(or the result of reification will be unhygienic).
To combat this, type trees for such getters are now created empty,
i.e. without any `tpe` set, just having an original assigned.
Subsequent `typedTypeTree` invocations fill in the `tpe` and
update the original to be symful.
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SI-6673 fixes macro problems with eta expansions
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Eta expansions previously caused the typer to disable macros. That was
done in order to detect eta expansion of macro defs and show the user
an appropriate error message.
Macros were disabled because to find out whether we're expanding
a macro def, we need to get its symbol, and to get a symbol of something
we need to typecheck that something. However typechecking automatically
expands macros, so, unless we disable macros, after a typecheck we won't
be able to analyze macro occurrences anymore.
Unfortunately this solution has a fatal flaw. By disabling macros we
not only prevent the eta-expandee from macro expanding, but also all
the subtrees of that eta-expandee (see SI-6673).
This commit adds a mechanism for fine-grained control over macro
expansion. Now it's possible to prohibit only the node, but not its
children from macro expanding.
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SI-6695 Test case for fixed Array match bug
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SI-6632 SI-6633 Fixes issues and data corruption in ListBuffer
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- Disallow negative positions for ListBuffer#insert/insertAll/update
- Fix data corruption issue in ListBuffer#insert
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SI-6634 Fixes data corruption issue in ListBuffer#remove
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This is the cut-down version with minimally invasive changes,
e. g. keeping the "auto-correcting" bounds algorithm.
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Fixes SI-6551.
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Don't rewrite an explicit apply method to dynamic polytypes.
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Si 6663 2.10.x fix type parameter on selectDynamic
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Fix mkInvoke to handle selectDynamic calls of the form
new C.foo[T].xyz
or
new C.foo[T].xyz :U
(where C extends Dynamic)
Without this patch, the type parameter was silently ignored, and
possibly inferred to a different.
This patch fixes mkInvoke to handle these cases, where ctxTree has
the form Select(TypeApply(fun, targs), nme) or Typed(...)
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Scaladoc update for collection.mutable.MultiMap
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Addition of source code example on how to use a MultiMap and its
defined methods. Minor correction in documentation for method
`removeBinding`.
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Restore the opimization apparently lost after merge.
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Fixes SI-6150 - backport to 2.10.x branch.
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SI-5330, SI-6014 deal with existential self-type
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This has been broken since https://github.com/scala/scala/commit/b7b81ca2#L0L567.
The existential rash is treated in a similar manner as in fc24db4c.
Conceptually, the fix would be `def selfTypeSkolemized =
widen.skolemizeExistential.narrow`, but simply widening before
narrowing achieves the same thing. Since we're in existential voodoo
territory, let's go for the minimal fix: replacing `this.narrow` by
`widen.narrow`.
--
Original patch by @retronym in #1074, refined by @paulp to
only perform widen.narrow incantation if there are
existentials present in the widened type, as
narrowing is expensive when the type is not a singleton.
The result is that compiling the entirety of quick, that
code path is hit only 143 times. All the other calls hit
.narrow directly as before. It looks like the definition
of negligible in the diff of -Ystatistics when compiling
src/library/scala/collection:
< #symbols : 306315
---
> #symbols : 306320
12c13
< #unique types : 293859
---
> #unique types : 293865
I'm assuming based on the 2/1000ths of a percent increase
in symbol and type creation that wall clock is manageable,
but I didn't measure it.
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show developer guidelines on opening pull request
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Includes "Improvements and typo fixes to CONTRIBUTING.md" by @heathercmiller
as well as feedback from @retronym.
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sane printing of renamed imports
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Having a select named "foo" with an underlying symbol named "bar"
and trying to make sense of all that by prettyprinting is very confusing
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SI-6448 Collecting the spoils of PartialFun#runWith
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Avoids calling both `isDefinedAt` and `apply`. This pathological
case that would benefit the most looks like:
xs collect {
case x if {expensive(); true} => x
}
The typical change looks like:
- for (x <- this) if (pf.isDefinedAt(x)) b += pf(x)
+ foreach(pf.runWith(b += _))
Incorporates feedback provided by Pavel Pavlov:
https://github.com/retronym/scala/commit/ef5430
A few more opportunities for optimization are noted in the
`Pending` section of the enclosed test. `Iterator.collect`
would be nice, but a solution eludes me.
Calling the guard less frequently does change the behaviour
of these functions in an obervable way, but not contravene
the documented semantics. That said, there is an alternative
opinion on the comment of the ticket:
https://issues.scala-lang.org/browse/SI-6448
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Removing unused code, take 2.
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All those old-timey methods whose melodies have become
unfashionable.
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They are everywhere.
They defy categorization.
They are... M I S C
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Nobody is immune!
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Removing code from this neighborhood is more difficult than
elsewhere, making it all the more important that it be done.
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Not a bad showing for a newcomer. Of course most of this
code predates scala.reflect by a lot.
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