Bug 548779 - [1.8][complete] eclipse hangs on String AutocompletionI20210422-1800

Change-Id: Ia46a242ac934d30c48781d33f3783c8f71317636
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/179694
Tested-by: JDT Bot <jdt-bot@eclipse.org>
Reviewed-by: Stephan Herrmann <stephan.herrmann@berlin.de>

1 files changed, 123 insertions, 0 deletions

diff --git a/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/CompletionTests18.java b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/CompletionTests18.java
index ee30e0f901..a102d22925 100644
--- a/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/CompletionTests18.java
+++ b/org.eclipse.jdt.core.tests.model/src/org/eclipse/jdt/core/tests/model/CompletionTests18.java
@@ -4509,4 +4509,127 @@ public void testBug558530() throws Exception {
             "trim[METHOD_REF]{trim(), Ljava.lang.String;, ()Ljava.lang.String;, trim, null, 90}",
             requestor.getResults());
 }
+public void testBug548779() throws JavaModelException {
+	this.workingCopies = new ICompilationUnit[2];
+	this.workingCopies[0] = getWorkingCopy(
+            "/Completion/src/test/Test.java",
+            "package test;\n" +
+            "\n" +
+            "public class Test {\n" +
+            "	String val = \"\";\n" +
+            "	{\n" +
+            "//		val.match\n" +
+            "	}\n" +
+            "}\n" +
+            "\n" +
+            "interface ConditionChecker {\n" +
+            "	boolean check(String line);\n" +
+            "}\n" +
+            "\n" +
+            "enum MyGuesser {\n" +
+            "	INT_LONG(\"INT_LONG\", (line) -> {\n" +
+            "		return line.contains(\"int\");\n" +
+            "	}, (line) -> {\n" +
+            "		return line.contains(\"long\");\n" +
+            "	});\n" +
+            "\n" +
+            "	String name;\n" +
+            "	ConditionChecker checker;\n" +
+            "	ConditionChecker checkerOld;\n" +
+            "\n" +
+            "	MyGuesser(String name, ConditionChecker checker, ConditionChecker checkerOld) {\n" +
+            "		this.name = name;\n" +
+            "		this.checker = checker;\n" +
+            "		this.checkerOld = checkerOld;\n" +
+            "	}\n" +
+            "}\n");
+
+    CompletionTestsRequestor2 requestor = new CompletionTestsRequestor2(true);
+	requestor.allowAllRequiredProposals();
+
+    String str = this.workingCopies[0].getSource();
+    String completeBehind = "line.";
+	int cursorLocation = str.lastIndexOf(completeBehind) + completeBehind.length();
+    this.workingCopies[0].codeComplete(cursorLocation, requestor, this.wcOwner, new NullProgressMonitor());
+
+    assertResults(
+            "copyValueOf[METHOD_REF]{copyValueOf, Ljava.lang.String;, ([C)Ljava.lang.String;, copyValueOf, (arg0), 49}\n" +
+            "copyValueOf[METHOD_REF]{copyValueOf, Ljava.lang.String;, ([CII)Ljava.lang.String;, copyValueOf, (arg0, arg1, arg2), 49}\n" +
+            "format[METHOD_REF]{format, Ljava.lang.String;, (Ljava.lang.String;[Ljava.lang.Object;)Ljava.lang.String;, format, (arg0, arg1), 49}\n" +
+            "format[METHOD_REF]{format, Ljava.lang.String;, (Ljava.util.Locale;Ljava.lang.String;[Ljava.lang.Object;)Ljava.lang.String;, format, (arg0, arg1, arg2), 49}\n" +
+            "join[METHOD_REF]{join, Ljava.lang.String;, (Ljava.lang.CharSequence;Ljava.lang.Iterable<+Ljava.lang.CharSequence;>;)Ljava.lang.String;, join, (arg0, arg1), 49}\n" +
+            "join[METHOD_REF]{join, Ljava.lang.String;, (Ljava.lang.CharSequence;[Ljava.lang.CharSequence;)Ljava.lang.String;, join, (arg0, arg1), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (C)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (D)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (F)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (I)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (J)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (Ljava.lang.Object;)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, (Z)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, ([C)Ljava.lang.String;, valueOf, (arg0), 49}\n" +
+            "valueOf[METHOD_REF]{valueOf, Ljava.lang.String;, ([CII)Ljava.lang.String;, valueOf, (arg0, arg1, arg2), 49}\n" +
+            "finalize[METHOD_REF]{finalize, Ljava.lang.Object;, ()V, finalize, null, 55}\n" +
+            "getBytes[METHOD_REF]{getBytes, Ljava.lang.String;, (II[BI)V, getBytes, (arg0, arg1, arg2, arg3), 55}\n" +
+            "getChars[METHOD_REF]{getChars, Ljava.lang.String;, (II[CI)V, getChars, (arg0, arg1, arg2, arg3), 55}\n" +
+            "notify[METHOD_REF]{notify, Ljava.lang.Object;, ()V, notify, null, 55}\n" +
+            "notifyAll[METHOD_REF]{notifyAll, Ljava.lang.Object;, ()V, notifyAll, null, 55}\n" +
+            "wait[METHOD_REF]{wait, Ljava.lang.Object;, ()V, wait, null, 55}\n" +
+            "wait[METHOD_REF]{wait, Ljava.lang.Object;, (J)V, wait, (millis), 55}\n" +
+            "wait[METHOD_REF]{wait, Ljava.lang.Object;, (JI)V, wait, (millis, nanos), 55}\n" +
+            "charAt[METHOD_REF]{charAt, Ljava.lang.String;, (I)C, charAt, (arg0), 60}\n" +
+            "chars[METHOD_REF]{chars, Ljava.lang.CharSequence;, ()Ljava.util.stream.IntStream;, chars, null, 60}\n" +
+            "clone[METHOD_REF]{clone, Ljava.lang.Object;, ()Ljava.lang.Object;, clone, null, 60}\n" +
+            "codePointAt[METHOD_REF]{codePointAt, Ljava.lang.String;, (I)I, codePointAt, (arg0), 60}\n" +
+            "codePointBefore[METHOD_REF]{codePointBefore, Ljava.lang.String;, (I)I, codePointBefore, (arg0), 60}\n" +
+            "codePointCount[METHOD_REF]{codePointCount, Ljava.lang.String;, (II)I, codePointCount, (arg0, arg1), 60}\n" +
+            "codePoints[METHOD_REF]{codePoints, Ljava.lang.CharSequence;, ()Ljava.util.stream.IntStream;, codePoints, null, 60}\n" +
+            "compareTo[METHOD_REF]{compareTo, Ljava.lang.String;, (Ljava.lang.String;)I, compareTo, (arg0), 60}\n" +
+            "compareToIgnoreCase[METHOD_REF]{compareToIgnoreCase, Ljava.lang.String;, (Ljava.lang.String;)I, compareToIgnoreCase, (arg0), 60}\n" +
+            "concat[METHOD_REF]{concat, Ljava.lang.String;, (Ljava.lang.String;)Ljava.lang.String;, concat, (arg0), 60}\n" +
+            "getBytes[METHOD_REF]{getBytes, Ljava.lang.String;, ()[B, getBytes, null, 60}\n" +
+            "getBytes[METHOD_REF]{getBytes, Ljava.lang.String;, (Ljava.lang.String;)[B, getBytes, (arg0), 60}\n" +
+            "getBytes[METHOD_REF]{getBytes, Ljava.lang.String;, (Ljava.nio.charset.Charset;)[B, getBytes, (arg0), 60}\n" +
+            "getClass[METHOD_REF]{getClass, Ljava.lang.Object;, ()Ljava.lang.Class<*>;, getClass, null, 60}\n" +
+            "hashCode[METHOD_REF]{hashCode, Ljava.lang.String;, ()I, hashCode, null, 60}\n" +
+            "indexOf[METHOD_REF]{indexOf, Ljava.lang.String;, (I)I, indexOf, (arg0), 60}\n" +
+            "indexOf[METHOD_REF]{indexOf, Ljava.lang.String;, (II)I, indexOf, (arg0, arg1), 60}\n" +
+            "indexOf[METHOD_REF]{indexOf, Ljava.lang.String;, (Ljava.lang.String;)I, indexOf, (arg0), 60}\n" +
+            "indexOf[METHOD_REF]{indexOf, Ljava.lang.String;, (Ljava.lang.String;I)I, indexOf, (arg0, arg1), 60}\n" +
+            "intern[METHOD_REF]{intern, Ljava.lang.String;, ()Ljava.lang.String;, intern, null, 60}\n" +
+            "lastIndexOf[METHOD_REF]{lastIndexOf, Ljava.lang.String;, (I)I, lastIndexOf, (arg0), 60}\n" +
+            "lastIndexOf[METHOD_REF]{lastIndexOf, Ljava.lang.String;, (II)I, lastIndexOf, (arg0, arg1), 60}\n" +
+            "lastIndexOf[METHOD_REF]{lastIndexOf, Ljava.lang.String;, (Ljava.lang.String;)I, lastIndexOf, (arg0), 60}\n" +
+            "lastIndexOf[METHOD_REF]{lastIndexOf, Ljava.lang.String;, (Ljava.lang.String;I)I, lastIndexOf, (arg0, arg1), 60}\n" +
+            "length[METHOD_REF]{length, Ljava.lang.String;, ()I, length, null, 60}\n" +
+            "offsetByCodePoints[METHOD_REF]{offsetByCodePoints, Ljava.lang.String;, (II)I, offsetByCodePoints, (arg0, arg1), 60}\n" +
+            "replace[METHOD_REF]{replace, Ljava.lang.String;, (CC)Ljava.lang.String;, replace, (arg0, arg1), 60}\n" +
+            "replace[METHOD_REF]{replace, Ljava.lang.String;, (Ljava.lang.CharSequence;Ljava.lang.CharSequence;)Ljava.lang.String;, replace, (arg0, arg1), 60}\n" +
+            "replaceAll[METHOD_REF]{replaceAll, Ljava.lang.String;, (Ljava.lang.String;Ljava.lang.String;)Ljava.lang.String;, replaceAll, (arg0, arg1), 60}\n" +
+            "replaceFirst[METHOD_REF]{replaceFirst, Ljava.lang.String;, (Ljava.lang.String;Ljava.lang.String;)Ljava.lang.String;, replaceFirst, (arg0, arg1), 60}\n" +
+            "split[METHOD_REF]{split, Ljava.lang.String;, (Ljava.lang.String;)[Ljava.lang.String;, split, (arg0), 60}\n" +
+            "split[METHOD_REF]{split, Ljava.lang.String;, (Ljava.lang.String;I)[Ljava.lang.String;, split, (arg0, arg1), 60}\n" +
+            "subSequence[METHOD_REF]{subSequence, Ljava.lang.String;, (II)Ljava.lang.CharSequence;, subSequence, (arg0, arg1), 60}\n" +
+            "substring[METHOD_REF]{substring, Ljava.lang.String;, (I)Ljava.lang.String;, substring, (arg0), 60}\n" +
+            "substring[METHOD_REF]{substring, Ljava.lang.String;, (II)Ljava.lang.String;, substring, (arg0, arg1), 60}\n" +
+            "toCharArray[METHOD_REF]{toCharArray, Ljava.lang.String;, ()[C, toCharArray, null, 60}\n" +
+            "toLowerCase[METHOD_REF]{toLowerCase, Ljava.lang.String;, ()Ljava.lang.String;, toLowerCase, null, 60}\n" +
+            "toLowerCase[METHOD_REF]{toLowerCase, Ljava.lang.String;, (Ljava.util.Locale;)Ljava.lang.String;, toLowerCase, (arg0), 60}\n" +
+            "toString[METHOD_REF]{toString, Ljava.lang.String;, ()Ljava.lang.String;, toString, null, 60}\n" +
+            "toUpperCase[METHOD_REF]{toUpperCase, Ljava.lang.String;, ()Ljava.lang.String;, toUpperCase, null, 60}\n" +
+            "toUpperCase[METHOD_REF]{toUpperCase, Ljava.lang.String;, (Ljava.util.Locale;)Ljava.lang.String;, toUpperCase, (arg0), 60}\n" +
+            "trim[METHOD_REF]{trim, Ljava.lang.String;, ()Ljava.lang.String;, trim, null, 60}\n" +
+            "contains[METHOD_REF]{contains, Ljava.lang.String;, (Ljava.lang.CharSequence;)Z, contains, (arg0), 90}\n" +
+            "contentEquals[METHOD_REF]{contentEquals, Ljava.lang.String;, (Ljava.lang.CharSequence;)Z, contentEquals, (arg0), 90}\n" +
+            "contentEquals[METHOD_REF]{contentEquals, Ljava.lang.String;, (Ljava.lang.StringBuffer;)Z, contentEquals, (arg0), 90}\n" +
+            "endsWith[METHOD_REF]{endsWith, Ljava.lang.String;, (Ljava.lang.String;)Z, endsWith, (arg0), 90}\n" +
+            "equals[METHOD_REF]{equals, Ljava.lang.String;, (Ljava.lang.Object;)Z, equals, (arg0), 90}\n" +
+            "equalsIgnoreCase[METHOD_REF]{equalsIgnoreCase, Ljava.lang.String;, (Ljava.lang.String;)Z, equalsIgnoreCase, (arg0), 90}\n" +
+            "isEmpty[METHOD_REF]{isEmpty, Ljava.lang.String;, ()Z, isEmpty, null, 90}\n" +
+            "matches[METHOD_REF]{matches, Ljava.lang.String;, (Ljava.lang.String;)Z, matches, (arg0), 90}\n" +
+            "regionMatches[METHOD_REF]{regionMatches, Ljava.lang.String;, (ILjava.lang.String;II)Z, regionMatches, (arg0, arg1, arg2, arg3), 90}\n" +
+            "regionMatches[METHOD_REF]{regionMatches, Ljava.lang.String;, (ZILjava.lang.String;II)Z, regionMatches, (arg0, arg1, arg2, arg3, arg4), 90}\n" +
+            "startsWith[METHOD_REF]{startsWith, Ljava.lang.String;, (Ljava.lang.String;)Z, startsWith, (arg0), 90}\n" +
+            "startsWith[METHOD_REF]{startsWith, Ljava.lang.String;, (Ljava.lang.String;I)Z, startsWith, (arg0, arg1), 90}",
+    		requestor.getResults());
+}
 }