lib: add type names in source mapped stack traces

lib/internal/source_map/prepare_stack_trace.js

@@ -112,17 +112,12 @@ function serializeJSStackFrame(sm, callSite, callerCallSite) {
 
   const typeName = callSite.getTypeName();
   const namePrefix = typeName !== null && typeName !== 'global' ? `${typeName}.` : '';
-  const originalName = `${namePrefix}${fnName || '<anonymous>'}`;
-  // The original call site may have a different symbol name
-  // associated with it, use it:
-  const mappedName = (name && name !== originalName) ?
-    `${name}` :
-    `${originalName}`;
-  const hasName = !!(name || originalName);
+  const originalName = `${fnName || '<anonymous>'}`;
+  const mappedName = `${namePrefix}${name || originalName}` || '';
   // Replace the transpiled call site with the original:
-  return `${prefix}${mappedName}${hasName ? ' (' : ''}` +
+  return `${prefix}${mappedName} (` +
     `${originalSourceNoScheme}:${originalLine + 1}:` +
-    `${originalColumn + 1}${hasName ? ')' : ''}`;
+    `${originalColumn + 1})`;
 }
 
 // Transpilers may have removed the original symbol name used in the stack

test/fixtures/source-map/output/source_map_throw_class_method.js

@@ -0,0 +1,7 @@
+'use strict';
+
+// Flags: --enable-source-maps
+
+require('../../../common');
+Error.stackTraceLimit = 2;
+require('../throw-class-method.min.js');

test/fixtures/source-map/output/source_map_throw_class_method.snapshot

@@ -0,0 +1,6 @@
+Error: This is a test
+    at Foo.bar (*/test/fixtures/source-map/throw-class-method.js:3:11)
+    at Object.<anonymous> (*/test/fixtures/source-map/throw-class-method.js:12:7)
+Error: This is a test
+    at Bar.bar (*/test/fixtures/source-map/throw-class-method.js:3:11)
+    at Object.<anonymous> (*/test/fixtures/source-map/throw-class-method.js:19:7)

test/fixtures/source-map/throw-class-method.js

@@ -0,0 +1,27 @@
+class Foo {
+  bar() {
+    throw Error('This is a test');
+  }
+}
+
+class Bar {}
+Bar.prototype.bar = Foo.prototype.bar;
+
+try {
+  const foo = new Foo();
+  foo.bar();
+} catch (e) {
+  console.error(e);
+}
+
+try {
+  const bar = Object.create(Bar.prototype);
+  bar.bar();
+} catch (e) {
+  console.error(e);
+}
+
+// To recreate:
+//
+// cd test/fixtures/source-map
+// npx terser -o throw-class-method.min.js --source-map "url='throw-class-method.min.js.map'" throw-class-method.js

test/parallel/test-node-output-sourcemaps.mjs

@@ -27,6 +27,7 @@ describe('sourcemaps output', { concurrency: !process.env.TEST_PARALLEL }, () =>
     { name: 'source-map/output/source_map_sourcemapping_url_string.js' },
     { name: 'source-map/output/source_map_throw_async_stack_trace.mjs' },
     { name: 'source-map/output/source_map_throw_catch.js' },
+    { name: 'source-map/output/source_map_throw_class_method.js' },
     { name: 'source-map/output/source_map_throw_construct.mjs' },
     { name: 'source-map/output/source_map_throw_first_tick.js' },
     { name: 'source-map/output/source_map_throw_icu.js' },