process: move DEP0062 (node --debug) to end-of-life

This has already been practically end-of-life since `node --debug`
alone would exit the process. This patch drops support of
`node --inspect --debug-brk` as well.

`node --inspect --debug-brk` has been deprecated since v8,
it has been maintained so that vendors can target Node.js
v6 and above without detecting versions.
The support of `--inspect`, which starts from v6, will reach
end-of-life in April 2019, it should be safe to drop the support
of `--inspect --debug-brk` altogether in v12.

Also removes `process._deprecatedDebugBrk`

PR-URL: #25828
Refs: #12949
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

doc/api/deprecations.md

@@ -1279,9 +1279,12 @@ changes:
   - version: v8.0.0
     pr-url: https://github.com/nodejs/node/pull/10970
     description: Runtime deprecation.
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/25828
+    description: End-of-Life.
 -->
 
-Type: Runtime
+Type: End-Of-Life
 
 `--debug` activates the legacy V8 debugger interface, which was removed as
 of V8 5.8. It is replaced by Inspector which is activated with `--inspect`

lib/internal/bootstrap/node.js

@@ -203,14 +203,6 @@ Object.defineProperty(process, 'argv0', {
 });
 process.argv[0] = process.execPath;
 
-// Handle `--debug*` deprecation and invalidation.
-if (process._deprecatedDebugBrk) {
-  process.emitWarning(
-    '`node --inspect --debug-brk` is deprecated. ' +
-    'Please use `node --inspect-brk` instead.',
-    'DeprecationWarning', 'DEP0062', undefined, true);
-}
-
 const { deprecate } = NativeModule.require('internal/util');
 {
   // Install legacy getters on the `util` binding for typechecking.

src/node_options.cc

@@ -36,6 +36,11 @@ void DebugOptions::CheckOptions(std::vector<std::string>* errors) {
                       "are invalid. Please use `node --inspect` or "
                       "`node --inspect-brk` instead.");
   }
+
+  if (deprecated_debug && inspector_enabled && break_first_line) {
+    errors->push_back("[DEP0062]: `node --inspect --debug-brk` is deprecated. "
+                      "Please use `node --inspect-brk` instead.");
+  }
 }
 
 void PerProcessOptions::CheckOptions(std::vector<std::string>* errors) {

src/node_options.h

@@ -75,12 +75,6 @@ class DebugOptions : public Options {
 
   HostPort host_port{"127.0.0.1", kDefaultInspectorPort};
 
-  bool deprecated_invocation() const {
-    return deprecated_debug &&
-      inspector_enabled &&
-      break_first_line;
-  }
-
   bool wait_for_connect() const {
     return break_first_line || break_node_first_line;
   }

src/node_process_object.cc

@@ -259,12 +259,6 @@ MaybeLocal<Object> CreateProcessObject(
                                 "_breakNodeFirstLine", True(env->isolate()));
   }
 
-  // --inspect --debug-brk
-  if (env->options()->debug_options().deprecated_invocation()) {
-    READONLY_DONT_ENUM_PROPERTY(process,
-                                "_deprecatedDebugBrk", True(env->isolate()));
-  }
-
   // --security-revert flags
 #define V(code, _, __)                                                        \
   do {                                                                        \

test/sequential/test-debugger-debug-brk.js

@@ -2,32 +2,19 @@
 const common = require('../common');
 common.skipIfInspectorDisabled();
 
-// This test ensures that the debug-brk flag will spin up a new process and
-// wait, rather than exit.
-
+// This test ensures that the --debug-brk flag will exit the process
 const assert = require('assert');
 const fixtures = require('../common/fixtures');
-const spawn = require('child_process').spawn;
+const { spawnSync } = require('child_process');
 
-// file name here doesn't actually matter since
-// debugger will connect regardless of file name arg
+// File name here doesn't actually matter the process will exit on start.
 const script = fixtures.path('empty.js');
 
 function test(arg) {
-  const child = spawn(process.execPath, ['--inspect', arg, script]);
-  const argStr = child.spawnargs.join(' ');
-  const fail = () => assert.fail(true, false, `'${argStr}' should not quit`);
-  child.on('exit', fail);
-
-  // give node time to start up the debugger
-  setTimeout(function() {
-    child.removeListener('exit', fail);
-    child.kill();
-  }, 2000);
-
-  process.on('exit', function() {
-    assert(child.killed);
-  });
+  const child = spawnSync(process.execPath, ['--inspect', arg, script]);
+  const stderr = child.stderr.toString();
+  assert(stderr.includes('DEP0062'));
+  assert.strictEqual(child.status, 9);
 }
 
 test('--debug-brk');