feat(r8): Sort ambiguous no-range entries alphabetically by method name

When multiple no-range entries with different original method names all
have line mappings, sort them alphabetically. Bare method entries (no
line mapping) preserve original mapping file order.

Fixes test_single_line_no_line_number_stacktrace — all 10 R8 line
number handling tests now pass.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: romtsn

src/cache/mod.rs

@@ -1249,7 +1249,17 @@ fn resolve_base_entries<'a>(
                     frames.push(f);
                 }
             } else {
-                for member in &no_range {
+                // Sort by original method name when all entries have line mappings;
+                // bare method entries preserve original mapping file order.
+                let mut entries = no_range;
+                if entries.iter().all(|m| m.has_line_mapping()) {
+                    entries.sort_by(|a, b| {
+                        let name_a = cache.read_string(a.original_name_offset).unwrap_or("");
+                        let name_b = cache.read_string(b.original_name_offset).unwrap_or("");
+                        name_a.cmp(name_b)
+                    });
+                }
+                for member in &entries {
                     if let Some(f) =
                         map_member_without_lines(cache, frame, member, outer_source_file, Some(0))
                     {

src/mapper.rs

@@ -407,7 +407,13 @@ fn resolve_base_entries<'s>(
                     .rewrite_rules
                     .extend(no_range[0].rewrite_rules.iter());
             } else {
-                for member in &no_range {
+                // Sort by original method name when all entries have line mappings;
+                // bare method entries preserve original mapping file order.
+                let mut entries = no_range;
+                if entries.iter().all(|m| m.has_line_mapping) {
+                    entries.sort_by_key(|m| m.original);
+                }
+                for member in &entries {
                     collected
                         .frames
                         .push(map_member_without_lines(frame, member, Some(0)));