JS: Classify native parser crashes consistently after pipe errors

Use the wrapper exit-code classification after IPC failures so a native prefetch crash is reported consistently with malformed responses. Preserve the communication-error fallback when the wrapper is still running.

Make the internal-error integration test terminate the native child instead of relying on the legacy parser's stack overflow.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 9f12f7cb-26aa-405b-a1f0-9dcc239778cb

Author: paldepind

javascript/extractor/src/com/semmle/ts/extractor/TypeScriptParser.java

@@ -365,12 +365,7 @@ private JsonObject talkToParserWrapper(JsonObject request) {
         throw getExceptionFromMalformedResponse(response, e);
       }
     } catch (IOException e) {
-      throw new CatastrophicError(
-          "Could not communicate with TypeScript parser wrapper "
-              + "(command: ."
-              + parserWrapperCommand
-              + ").",
-          e);
+      throw getExceptionFromMalformedResponse(response, e);
     }
   }
 
@@ -397,6 +392,14 @@ private RuntimeException getExceptionFromMalformedResponse(String response, Exce
     } catch (InterruptedException e1) {
       Exceptions.ignore(e, "This is for diagnostic purposes only.");
     }
+    if (e instanceof IOException) {
+      return new CatastrophicError(
+          "Could not communicate with TypeScript parser wrapper "
+              + "(command: ."
+              + parserWrapperCommand
+              + ").",
+          e);
+    }
     if (response == null) {
       return new CatastrophicError("No response from TypeScript parser wrapper", e);
     }

javascript/ql/integration-tests/diagnostics/internal-error/fail-native.cjs

@@ -0,0 +1,7 @@
+const childProcess = require("node:child_process");
+const spawn = childProcess.spawn;
+childProcess.spawn = function (...args) {
+    const child = spawn.apply(this, args);
+    child.kill();
+    return child;
+};

javascript/ql/integration-tests/diagnostics/internal-error/test.py

@@ -1,2 +1,6 @@
-def test(codeql, javascript):
-    codeql.database.create(_assert_failure=True)
+import os
+
+
+def test(codeql, javascript, cwd):
+    os.environ["NODE_OPTIONS"] = f'--require "{cwd / "fail-native.cjs"}"'
+    codeql.database.create(source_root="src", _assert_failure=True)