Index: lldb/tools/lldb-vscode/lldb-vscode.cpp
===================================================================
--- lldb/tools/lldb-vscode/lldb-vscode.cpp
+++ lldb/tools/lldb-vscode/lldb-vscode.cpp
@@ -2777,6 +2777,12 @@
 
 int main(int argc, char *argv[]) {
 
+  // LLDB writes logs to stderr and the system logs, but
+  // no one is reading from stderr so this can block
+  // once the pipe buffer is full.
+  fclose(stderr);
+  stderr = fopen("/dev/null", "w");
+
   // Initialize LLDB first before we do anything.
   lldb::SBDebugger::Initialize();