Fix the assertion crash from rustdoc document indent widths

Author: chenyukang

compiler/rustc_resolve/src/rustdoc.rs

@@ -136,8 +136,11 @@ pub fn unindent_doc_fragments(docs: &mut [DocFragment]) {
                     // Compare against either space or tab, ignoring whether they are
                     // mixed or not.
                     let whitespace = line.chars().take_while(|c| *c == ' ' || *c == '\t').count();
-                    cmp::min(min_indent, whitespace)
-                        + if fragment.kind == DocFragmentKind::SugaredDoc { 0 } else { add }
+                    cmp::min(
+                        min_indent,
+                        whitespace
+                            + (if fragment.kind == DocFragmentKind::SugaredDoc { 0 } else { add }),
+                    )
                 }
             })
         })
@@ -151,13 +154,13 @@ pub fn unindent_doc_fragments(docs: &mut [DocFragment]) {
             continue;
         }
 
-        let min_indent = if fragment.kind != DocFragmentKind::SugaredDoc && min_indent > 0 {
+        let indent = if fragment.kind != DocFragmentKind::SugaredDoc && min_indent > 0 {
             min_indent - add
         } else {
             min_indent
         };
 
-        fragment.indent = min_indent;
+        fragment.indent = indent;
     }
 }
 

tests/rustdoc/resolve-ice-124363.rs

@@ -0,0 +1,7 @@
+/**
+*/
+pub mod A {
+    #![doc = "{
+         Foo { },
+     }"]
+}