[clang-format] Fix an assertion failure in RemoveSemicolon (#117472)

Fixes #117290.

Author: owenca

clang/lib/Format/TokenAnnotator.cpp

@@ -3901,6 +3901,11 @@ bool TokenAnnotator::mustBreakForReturnType(const AnnotatedLine &Line) const {
 }
 
 void TokenAnnotator::calculateFormattingInformation(AnnotatedLine &Line) const {
+  if (Line.Computed)
+    return;
+
+  Line.Computed = true;
+
   for (AnnotatedLine *ChildLine : Line.Children)
     calculateFormattingInformation(*ChildLine);
 

clang/lib/Format/TokenAnnotator.h

@@ -182,6 +182,9 @@ class AnnotatedLine {
   /// \c True if this line contains a macro call for which an expansion exists.
   bool ContainsMacroCall = false;
 
+  /// \c True if calculateFormattingInformation() has been called on this line.
+  bool Computed = false;
+
   /// \c True if this line should be formatted, i.e. intersects directly or
   /// indirectly with one of the input ranges.
   bool Affected;

clang/unittests/Format/FormatTest.cpp

@@ -27386,6 +27386,13 @@ TEST_F(FormatTest, RemoveSemicolon) {
                Style);
 #endif
 
+  verifyFormat("auto sgf = [] {\n"
+               "  ogl = {\n"
+               "      a, b, c, d, e,\n"
+               "  };\n"
+               "};",
+               Style);
+
   Style.TypenameMacros.push_back("STRUCT");
   verifyFormat("STRUCT(T, B) { int i; };", Style);
 }