src/jdk.compiler/share/classes/com/sun/tools/javac/code/DeferredCompletionFailureHandler.java

rev 54093 : 8177068: incomplete classpath causes NPE in Flow
Summary: Undo completions that failed during speculative attribution, so that the appropriate CompletionFailures are thrown again and properly reported.
Reviewed-by: vromero

*** 84,93 ****
--- 84,113 ----
          public void uninstall() {
              class2Flip.values().forEach(f -> f.flip());
          }
      };
  
+     public final Handler speculativeCodeHandler = new Handler() {
+         private final Map<ClassSymbol, FlipSymbolDescription> class2Flip = new HashMap<>();
+ 
+         public void install() {
+         }
+         public void handleAPICompletionFailure(CompletionFailure cf) {
+             throw cf;
+         }
+         public void classSymbolCompleteFailed(ClassSymbol sym, Completer origCompleter) {
+             class2Flip.put(sym, new FlipSymbolDescription(sym, new DeferredCompleter(origCompleter)));
+         }
+         public void classSymbolRemoved(ClassSymbol sym) {
+             class2Flip.remove(sym);
+         }
+         public void uninstall() {
+             class2Flip.values().forEach(f -> f.flip());
+             class2Flip.clear();
+         }
+     };
+ 
      public final Handler javacCodeHandler = new Handler() {
          public void install() {
          }
          public void handleAPICompletionFailure(CompletionFailure cf) {
              throw cf;