| [#619] | project: compiler | priority: low | category: bug | |
|---|---|---|---|---|
| submitter | assigned to | status | date submitted | |
| Sean | Martin | not repro | 2006-06-02 16:32:30.0 | |
| subject | implicit parameter shadowing doesn't work | |||
| code |
class Context;
object bar {
implicit def txt0 : Context = null;
}
abstract class Foo {
import bar._;
abstract class Bar {
def foo(implicit txt : Context) : Unit = {
foo;
}
}
}
|
|||
| what happened | java.lang.NullPointerException at scala.tools.nsc.symtab.SymbolLoaders$SourcefileLoader.doComplete(SymbolLoaders.scala:221) at scala.tools.nsc.symtab.SymbolLoaders$SymbolLoader.complete(SymbolLoaders.scala:48) at scala.tools.nsc.symtab.Symbols$Symbol.info(Symbols.scala:346) at scala.tools.nsc.symtab.Symbols$Symbol.tpe(Symbols.scala:322) at scala.tools.nsc.symtab.Types$Type.memberType(Types.scala:203) at scala.tools.nsc.symtab.Symbols$Symbol$$anonfun$6.apply(Symbols.scala:633) at scala.tools.nsc.symtab.Symbols$Symbol$$anonfun$6.apply(Symbols.scala:632) at scala.tools.nsc.symtab.Symbols$Symbol.filter(Symbols.scala:511) at scala.tools.nsc.symtab.Symbols$Symbol.matchingSymbol(Symbols.scala:632) at scala.tools.nsc.symtab.Symbols$Symbol.overriddenSymbol(Symbols.scala:637) at scala.tools.nsc.symtab.Symbols$Symbol$$anonfun$7.apply(Symbols.scala:646) at scala.tools.nsc.symtab.Symbols$Symbol$$anonfun$7.apply(Symbols.scala:645) at scala.List.map(List.scala:652) at scala.tools.nsc.symtab.Symbols$Symbol.allOverriddenSymbols(Symbols.scala:645) at ch.epfl.lamp.sdt.ui.scalaeditor.OverrideIndicatorManager$OverrideIndicator.overrides(OverrideIndicatorManage\ r.java:23) at ch.epfl.lamp.sdt.ui.scalaeditor.OverrideIndicatorManager$OverrideIndicator.isValid(OverrideIndicatorManager.\ java:44) at ch.epfl.lamp.sdt.ui.scalaeditor.OverrideIndicatorManager.refresh(OverrideIndicatorManager.java:75) at ch.epfl.lamp.sdt.ui.actions.HighlightAction.run(HighlightAction.java:105) at ch.epfl.lamp.sdt.ui.actions.HighlightAction.run(HighlightAction.java:77) at ch.epfl.lamp.sdt.ui.actions.HighlightAction$1.run(HighlightAction.java:61) at ch.epfl.lamp.sdt.ui.actions.HighlightAction.run(HighlightAction.java:65) at ch.epfl.lamp.sdt.ui.scalaeditor.ScalaEditor$1.focusGained(ScalaEditor.java:206) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:105) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1109) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1090) at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2592) at org.eclipse.swt.widgets.Control.gtk_event_after(Control.java:2002) at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1429) at org.eclipse.swt.widgets.Display.windowProc(Display.java:3796) at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method) at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:5245) at org.eclipse.swt.widgets.Display.eventProc(Display.java:1133) at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method) at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:1427) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2838) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336) at org.eclipse.core.launcher.Main.basicRun(Main.java:280) at org.eclipse.core.launcher.Main.run(Main.java:977) at org.eclipse.core.launcher.Main.main(Main.java:952) |
|||
| what expected | Shouldn't crash. | |||
| [back to overview] | ||||
| Sean edited on 2006-06-02 16:33:06.0 |
| Martin edited on 2006-06-04 19:36:10.0 |
| Shadowing is supposed to apply only if the two implicits have the same name. |
| Sean edited on 2006-06-07 16:32:24.0 |
| Noisey bug before, crashes compiler on latest revision. |
| Martin edited on 2006-06-07 16:48:41.0 |
I get:
bug619.scala:9 error: ambiguous implicit value:
both value txt of type Context
and method txt0 in object bar of type => Context
match expected type Context
foo;
^
one error found
|
| Martin edited on 2006-06-07 22:09:43.0 |
| Something's wrong here. The current file SymbolLoaders does not have a line 221 (the one where the NPE occurs); it ends at line 218. Sean, are you sure you use the latest version? |