src: handle empty Maybe in uv binding initialize

This can fail when terminating a Worker that loads
the `uv` binding at the same time.

Refs: https://github.com/nodejs/node/pull/25061#issuecomment-447648475
Fixes: https://github.com/nodejs/node/issues/25134
PR-URL: https://github.com/nodejs/node/pull/25079
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/uv.cc b/src/uv.cc
index 79c221f4df..27daed556e 100644
--- a/src/uv.cc
+++ b/src/uv.cc
@@ -81,9 +81,11 @@ void Initialize(Local<Object> target,
     OneByteString(isolate, #name),                                            \
     OneByteString(isolate, msg)                                               \
   };                                                                          \
-  err_map->Set(context,                                                       \
-               Integer::New(isolate, UV_##name),                              \
-               Array::New(isolate, arr, arraysize(arr))).ToLocalChecked();    \
+  if (err_map->Set(context,                                                   \
+                   Integer::New(isolate, UV_##name),                          \
+                   Array::New(isolate, arr, arraysize(arr))).IsEmpty()) {     \
+    return;                                                                   \
+  }                                                                           \
 } while (0);
   UV_ERRNO_MAP(V)
 #undef V