hygiene: Downgrade is_decode_placeholder asserts to debug asserts

Author: petrochenkov

compiler/rustc_span/src/hygiene.rs

@@ -448,28 +448,28 @@ impl HygieneData {
     }
 
     fn normalize_to_macros_2_0(&self, ctxt: SyntaxContext) -> SyntaxContext {
-        assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         self.syntax_context_data[ctxt.0 as usize].opaque
     }
 
     fn normalize_to_macro_rules(&self, ctxt: SyntaxContext) -> SyntaxContext {
-        assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         self.syntax_context_data[ctxt.0 as usize].opaque_and_semitransparent
     }
 
     fn outer_expn(&self, ctxt: SyntaxContext) -> ExpnId {
-        assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         self.syntax_context_data[ctxt.0 as usize].outer_expn
     }
 
     fn outer_mark(&self, ctxt: SyntaxContext) -> (ExpnId, Transparency) {
-        assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         let data = &self.syntax_context_data[ctxt.0 as usize];
         (data.outer_expn, data.outer_transparency)
     }
 
     fn parent_ctxt(&self, ctxt: SyntaxContext) -> SyntaxContext {
-        assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!self.syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         self.syntax_context_data[ctxt.0 as usize].parent
     }
 
@@ -579,7 +579,7 @@ impl HygieneData {
         transparency: Transparency,
     ) -> SyntaxContext {
         let syntax_context_data = &mut self.syntax_context_data;
-        assert!(!syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
+        debug_assert!(!syntax_context_data[ctxt.0 as usize].is_decode_placeholder());
         let mut opaque = syntax_context_data[ctxt.0 as usize].opaque;
         let mut opaque_and_semitransparent =
             syntax_context_data[ctxt.0 as usize].opaque_and_semitransparent;
@@ -926,7 +926,7 @@ impl SyntaxContext {
 
     pub(crate) fn dollar_crate_name(self) -> Symbol {
         HygieneData::with(|data| {
-            assert!(!data.syntax_context_data[self.0 as usize].is_decode_placeholder());
+            debug_assert!(!data.syntax_context_data[self.0 as usize].is_decode_placeholder());
             data.syntax_context_data[self.0 as usize].dollar_crate_name
         })
     }