diff --git a/CHANGELOG.md b/CHANGELOG.md
index bba1abc6..30a50473 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,11 @@ Status of the `main` branch. Changes prior to the next official version change w
     indicate it was incomplete. Serena now declares work-done progress support and waits for the work
     Metals reports, bounded by the new `indexing_timeout`, `indexing_start_grace` and
     `indexing_quiet_period` settings
+  - Fix: a `tsserver` crash mid-indexing (e.g. a V8 heap OOM) sent the same `$/progress` "end"
+    event as a normal completion, so `find_referencing_symbols` and other cross-file queries
+    silently returned an empty result instead of surfacing the crash. The crash is now detected
+    independently via the `window/logMessage` notification tsserver already sends, and the
+    affected wait now raises instead of reporting success (#1814)
 
 * Dependencies:
   - Remove the redundant `dotenv` dependency; the `dotenv` module is provided by `python-dotenv`
diff --git a/src/solidlsp/language_servers/typescript_language_server.py b/src/solidlsp/language_servers/typescript_language_server.py
index 063b2524..c02cf13c 100644
--- a/src/solidlsp/language_servers/typescript_language_server.py
+++ b/src/solidlsp/language_servers/typescript_language_server.py
@@ -4,6 +4,7 @@ Provides TypeScript specific instantiation of the LanguageServer class. Contains
 
 import logging
 import os
+import re
 import shutil
 import threading
 import time
@@ -15,7 +16,9 @@ from sensai.util.logging import LogTime
 from solidlsp import ls_types
 from solidlsp.ls import LanguageServerDependencyProvider, LanguageServerDependencyProviderSinglePath, SolidLanguageServer
 from solidlsp.ls_config import LanguageServerConfig
+from solidlsp.ls_exceptions import SolidLSPException
 from solidlsp.ls_utils import PlatformId, PlatformUtils
+from solidlsp.lsp_protocol_handler.lsp_types import MessageType
 from solidlsp.settings import SolidLSPSettings
 
 from .common import RuntimeDependency, RuntimeDependencyCollection, build_npm_install_command
@@ -65,6 +68,21 @@ def prefer_non_node_modules_definition(definitions: list[ls_types.Location]) ->
     return definitions[0]
 
 
+class TypeScriptServerCrashedError(SolidLSPException):
+    """Raised when tsserver reported its own abnormal exit via window/logMessage.
+
+    typescript-language-server sends a $/progress "end" event for the in-flight
+    token as part of tearing its connection down after tsserver dies, which is
+    otherwise indistinguishable from a normal indexing completion.
+    """
+
+
+# Matches typescript-language-server's window/logMessage notification for an abnormal
+# tsserver exit, e.g. "[lspserver] [tsclient] [tsserver] Exited. Code: null. Signal: SIGABRT".
+# A clean shutdown does not produce this message.
+_TSSERVER_EXITED_PATTERN = re.compile(r"\[tsserver\]\s+Exited\b", re.IGNORECASE)
+
+
 class TypeScriptLanguageServer(SolidLanguageServer):
     """
     Provides TypeScript specific instantiation of the LanguageServer class. Contains various configurations and settings specific to TypeScript.
@@ -114,14 +132,36 @@ class TypeScriptLanguageServer(SolidLanguageServer):
         self._active_progress_tokens: set[str] = set()
         self._indexing_complete = threading.Event()
         self._indexing_complete.set()  # Initially set (no active work)
+        # set from window/logMessage when tsserver reports its own abnormal exit;
+        # a crash mid-indexing still drains _active_progress_tokens via a $/progress
+        # "end" event, so that alone cannot distinguish a crash from real completion
+        self._crash_message: str | None = None
+
+    def _raise_if_crashed(self) -> None:
+        if self._crash_message is not None:
+            raise TypeScriptServerCrashedError(self._crash_message)
+
+    @staticmethod
+    def _tsserver_exit_message(msg: dict) -> str | None:
+        """:return: the log text if ``msg`` is tsserver reporting its own abnormal exit, else None."""
+        if msg.get("type") != MessageType.Error:
+            return None
+        message_text = str(msg.get("message", ""))
+        if _TSSERVER_EXITED_PATTERN.search(message_text):
+            return message_text
+        return None
 
     def wait_for_indexing(self, timeout: float) -> bool:
         """Block until all $/progress tokens complete.
 
         :param timeout: Maximum seconds to wait.
         :return: True if indexing completed, False on timeout.
+        :raises TypeScriptServerCrashedError: if tsserver reported an abnormal exit.
         """
-        return self._indexing_complete.wait(timeout=timeout)
+        result = self._indexing_complete.wait(timeout=timeout)
+        if result:
+            self._raise_if_crashed()
+        return result
 
     def _wait_for_indexing_start_or_completion(self, timeout: float, start_grace: float | None = None) -> bool:
         """Wait until TypeScript indexing has started and drained, or provably never started.
@@ -129,6 +169,7 @@ class TypeScriptLanguageServer(SolidLanguageServer):
         :param timeout: Maximum seconds to wait once active indexing progress is observed.
         :param start_grace: Maximum seconds to wait for progress to begin after opening files.
         :return: True if indexing completed or no progress began within the grace period, False on timeout.
+        :raises TypeScriptServerCrashedError: if tsserver reported an abnormal exit.
         """
         grace = self.INDEXING_START_GRACE if start_grace is None else start_grace
 
@@ -139,6 +180,7 @@ class TypeScriptLanguageServer(SolidLanguageServer):
                 if self._active_progress_tokens:
                     break
                 if self._indexing_complete.is_set():
+                    self._raise_if_crashed()
                     return True
             time.sleep(0.05)
 
@@ -147,6 +189,7 @@ class TypeScriptLanguageServer(SolidLanguageServer):
             has_active_progress = bool(self._active_progress_tokens)
             if not has_active_progress:
                 self._indexing_complete.set()
+                self._raise_if_crashed()
                 return True
 
         # wait for active progress to drain
@@ -382,6 +425,10 @@ class TypeScriptLanguageServer(SolidLanguageServer):
 
         def window_log_message(msg: dict) -> None:
             log.info(f"LSP: window/logMessage: {msg}")
+            crash_text = self._tsserver_exit_message(msg)
+            if crash_text is not None:
+                log.warning(f"tsserver reported an abnormal exit: {crash_text}")
+                self._crash_message = f"tsserver exited abnormally: {crash_text}"
 
         def handle_typescript_version(params: dict) -> None:
             """
diff --git a/test/solidlsp/test_typescript_timeout_policy.py b/test/solidlsp/test_typescript_timeout_policy.py
index ad2274b0..f71867ca 100644
--- a/test/solidlsp/test_typescript_timeout_policy.py
+++ b/test/solidlsp/test_typescript_timeout_policy.py
@@ -17,7 +17,7 @@ from solidlsp.language_servers.svelte_language_server import (
     SvelteLanguageServer,
     SvelteTypeScriptServer,
 )
-from solidlsp.language_servers.typescript_language_server import TypeScriptLanguageServer
+from solidlsp.language_servers.typescript_language_server import TypeScriptLanguageServer, TypeScriptServerCrashedError
 from solidlsp.settings import SolidLSPSettings
 
 
@@ -31,6 +31,7 @@ def _bare_ts_server(cls: type[TypeScriptLanguageServer], custom_settings: dict |
     server._active_progress_tokens = set()
     server._indexing_complete = threading.Event()
     server._indexing_complete.set()  # mirrors __init__: initially no active work
+    server._crash_message = None  # mirrors __init__: no crash observed yet
     server._custom_settings = SolidLSPSettings.CustomLSSettings(custom_settings)
     return server
 
@@ -149,6 +150,111 @@ class TestWaitForIndexingStartOrCompletion:
             timer.cancel()
 
 
+class TestTsserverCrashDetection:
+    """oraios/serena#1814: typescript-language-server sends a $/progress "end" for the
+    in-flight token as part of tearing its connection down after tsserver dies, which
+    _wait_for_indexing_start_or_completion previously could not distinguish from a real
+    completion: find_referencing_symbols returned {} with isError: false instead of
+    surfacing the crash. window/logMessage does carry the crash independently; these
+    tests drive the exact begin/crash-log/end sequence from the reporter's log and pin
+    that every wait path now raises instead of reporting silent success.
+    """
+
+    def test_tsserver_exit_message_matches_sigabrt_line(self) -> None:
+        msg = {"type": 1, "message": "[lspserver] [tsclient] [tsserver] Exited. Code: null. Signal: SIGABRT"}
+        assert TypeScriptLanguageServer._tsserver_exit_message(msg) == msg["message"]
+
+    def test_tsserver_exit_message_ignores_non_error_type(self) -> None:
+        # type 3 (Info) is what a clean shutdown/log line would carry, not type 1 (Error)
+        msg = {"type": 3, "message": "[lspserver] [tsclient] [tsserver] Exited. Code: null. Signal: SIGABRT"}
+        assert TypeScriptLanguageServer._tsserver_exit_message(msg) is None
+
+    def test_tsserver_exit_message_ignores_unrelated_error(self) -> None:
+        msg = {"type": 1, "message": "Some other tsserver error unrelated to process exit"}
+        assert TypeScriptLanguageServer._tsserver_exit_message(msg) is None
+
+    def test_raise_if_crashed_is_a_noop_when_no_crash_observed(self) -> None:
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server._raise_if_crashed()  # must not raise
+
+    def test_raise_if_crashed_raises_with_recorded_message(self) -> None:
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server._crash_message = "tsserver exited abnormally: [tsserver] Exited. Code: null. Signal: SIGABRT"
+
+        with pytest.raises(TypeScriptServerCrashedError, match="SIGABRT"):
+            server._raise_if_crashed()
+
+    def test_wait_for_indexing_raises_when_progress_end_follows_a_crash(self) -> None:
+        """Drives the reporter's exact sequence: $/progress begin, the SIGABRT window/logMessage,
+        then $/progress end (teardown), the same "end" that previously read as success.
+        """
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server.expect_indexing()
+        server._active_progress_tokens.add("646a4e19")
+
+        # window/logMessage handler's effect: record the crash independently of progress state
+        server._crash_message = "tsserver exited abnormally: [tsserver] Exited. Code: null. Signal: SIGABRT"
+        # $/progress end (teardown): drains the token and sets indexing_complete, exactly as a
+        # real completion would
+        server._active_progress_tokens.discard("646a4e19")
+        server._indexing_complete.set()
+
+        with pytest.raises(TypeScriptServerCrashedError, match="SIGABRT"):
+            server.wait_for_indexing(timeout=1.0)
+
+    def test_wait_for_indexing_returns_true_on_clean_completion(self) -> None:
+        """Same $/progress begin/end shape as the crash test, without a crash message: must still
+        return True, not regress the ordinary success path.
+        """
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server.expect_indexing()
+        server._active_progress_tokens.add("646a4e19")
+        server._active_progress_tokens.discard("646a4e19")
+        server._indexing_complete.set()
+
+        assert server.wait_for_indexing(timeout=1.0) is True
+
+    def test_wait_for_indexing_start_or_completion_raises_via_early_is_set_branch(self) -> None:
+        """Covers the early "if self._indexing_complete.is_set(): return True" branch, which is
+        reached (not the tail wait_for_indexing() call) when begin+crash+end all land before the
+        first poll iteration observes an active token.
+        """
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server.expect_indexing()
+        server._crash_message = "tsserver exited abnormally: [tsserver] Exited. Code: null. Signal: SIGABRT"
+        server._indexing_complete.set()  # progress already drained by the time we start waiting
+
+        with pytest.raises(TypeScriptServerCrashedError, match="SIGABRT"):
+            server._wait_for_indexing_start_or_completion(timeout=1.0, start_grace=1.0)
+
+    def test_wait_for_indexing_start_or_completion_raises_via_absent_progress_branch(self) -> None:
+        """Covers the "treat absent progress as ready" branch: no active token observed within the
+        start grace, but a crash was already recorded.
+        """
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server.expect_indexing()
+        server._crash_message = "tsserver exited abnormally: [tsserver] Exited. Code: null. Signal: SIGABRT"
+
+        with pytest.raises(TypeScriptServerCrashedError, match="SIGABRT"):
+            server._wait_for_indexing_start_or_completion(timeout=1.0, start_grace=0.05)
+
+    def test_wait_for_cross_file_references_propagates_the_crash(self) -> None:
+        """The actual call path find_referencing_symbols drives (ls.py's SymbolLocationRequest.execute
+        calls this with no surrounding try/except) must raise, not silently log "indexing complete"
+        and let the caller receive an empty result.
+        """
+        server = _bare_ts_server(TypeScriptLanguageServer)
+        server._has_waited_for_cross_file_references = False
+        server.expect_indexing()
+        server._crash_message = "tsserver exited abnormally: [tsserver] Exited. Code: null. Signal: SIGABRT"
+
+        with pytest.raises(TypeScriptServerCrashedError, match="SIGABRT"):
+            server._wait_for_cross_file_references_if_needed()
+
+        # the crash must be reported, not swallowed into a false "we've already waited" state
+        assert server._has_waited_for_cross_file_references is False
+
+
 class TestWaitForCrossFileReferencesUsesConfiguredGrace:
     """The actual find-references call path (not just the helper in isolation) must honor
     indexing_start_grace: this is the mechanism behind oraios/serena#1586, where a large