fixed PY-11476 No error given for mismatched accolade and squarebracket

python/src/com/jetbrains/python/PyBundle.properties

@@ -637,6 +637,7 @@ PARSE.expected.comma=',' expected
 PARSE.expected.colon=':' expected
 PARSE.expected.rpar=')' expected
 PARSE.expected.lpar='(' expected
+PARSE.expected.rbrace='}' expected
 PARSE.expected.tick='`' (backtick) expected
 PARSE.expected.name=name expected
 PARSE.expected.colon.or.rbracket=':' or ']' expected

python/src/com/jetbrains/python/parsing/ExpressionParsing.java

@@ -236,7 +236,7 @@ public class ExpressionParsing extends Parsing {
           break;
         }
       }
-      myBuilder.advanceLexer();
+      checkMatches(PyTokenTypes.RBRACE, message("PARSE.expected.rbrace"));
       startMarker.done(PyElementTypes.DICT_LITERAL_EXPRESSION);
     }
   }
@@ -264,7 +264,7 @@ public class ExpressionParsing extends Parsing {
         break;
       }
     }
-    myBuilder.advanceLexer();
+    checkMatches(PyTokenTypes.RBRACE, message("PARSE.expected.rbrace"));
     startMarker.done(PyElementTypes.SET_LITERAL_EXPRESSION);
   }
 

python/testData/psi/NotClosedBraceDict.py

@@ -0,0 +1,3 @@
+a = {
+        'b': 'c',
+    ]

python/testData/psi/NotClosedBraceDict.txt

@@ -0,0 +1,24 @@
+PyFile:NotClosedBraceDict.py
+  PyAssignmentStatement
+    PyTargetExpression: a
+      PsiElement(Py:IDENTIFIER)('a')
+    PsiWhiteSpace(' ')
+    PsiElement(Py:EQ)('=')
+    PsiWhiteSpace(' ')
+    PyDictLiteralExpression
+      PsiElement(Py:LBRACE)('{')
+      PsiWhiteSpace('\n        ')
+      PyKeyValueExpression
+        PyStringLiteralExpression: b
+          PsiElement(Py:SINGLE_QUOTED_STRING)(''b'')
+        PsiElement(Py:COLON)(':')
+        PsiWhiteSpace(' ')
+        PyStringLiteralExpression: c
+          PsiElement(Py:SINGLE_QUOTED_STRING)(''c'')
+      PsiElement(Py:COMMA)(',')
+      PsiErrorElement:'}' expected
+        <empty list>
+  PsiWhiteSpace('\n    ')
+  PsiElement(Py:RBRACKET)(']')
+  PsiErrorElement:Statement expected, found Py:RBRACKET
+    <empty list>

python/testData/psi/NotClosedBraceSet.py

@@ -0,0 +1 @@
+a = {'b',]

python/testData/psi/NotClosedBraceSet.txt

@@ -0,0 +1,17 @@
+PyFile:NotClosedBraceSet.py
+  PyAssignmentStatement
+    PyTargetExpression: a
+      PsiElement(Py:IDENTIFIER)('a')
+    PsiWhiteSpace(' ')
+    PsiElement(Py:EQ)('=')
+    PsiWhiteSpace(' ')
+    PySetLiteralExpression
+      PsiElement(Py:LBRACE)('{')
+      PyStringLiteralExpression: b
+        PsiElement(Py:SINGLE_QUOTED_STRING)(''b'')
+      PsiElement(Py:COMMA)(',')
+      PsiErrorElement:'}' expected
+        <empty list>
+  PsiElement(Py:RBRACKET)(']')
+  PsiErrorElement:Statement expected, found Py:RBRACKET
+    <empty list>

python/testSrc/com/jetbrains/python/PythonParsingTest.java

@@ -430,6 +430,14 @@ public class PythonParsingTest extends ParsingTestCase {
     doTest();
   }
 
+  public void testNotClosedBraceDict() {
+    doTest();
+  }
+
+  public void testNotClosedBraceSet() {
+    doTest(LanguageLevel.PYTHON33);
+  }
+
   public void doTest(LanguageLevel languageLevel) {
     LanguageLevel prev = myLanguageLevel;
     myLanguageLevel = languageLevel;