Index: lld/ELF/Driver.cpp
===================================================================
--- lld/ELF/Driver.cpp
+++ lld/ELF/Driver.cpp
@@ -510,6 +510,13 @@
   ELFOptTable parser;
   opt::InputArgList args = parser.parse(argsArr.slice(1));
 
+  // SCE: Force a crash to test the diagnostics.
+  if (::getenv("FORCE_LLD_DIAGNOSTICS_CRASH")) {
+    message("crashing due to environment variable FORCE_LLD_DIAGNOSTICS_CRASH");
+    LLVM_BUILTIN_TRAP;
+  }
+  // SCE: end
+
   // Interpret these flags early because error()/warn() depend on them.
   errorHandler().errorLimit = args::getInteger(args, OPT_error_limit, 20);
   errorHandler().fatalWarnings =
Index: lld/docs/ReleaseNotes.rst
===================================================================
--- lld/docs/ReleaseNotes.rst
+++ lld/docs/ReleaseNotes.rst
@@ -29,6 +29,7 @@
 * ``-z pack-relative-relocs`` is now available to support ``DT_RELR`` for glibc 2.36+.
   (`D120701 <https://reviews.llvm.org/D120701>`_)
 * ``--no-fortran-common`` (pre 12.0.0 behavior) is now the default.
+* ``FORCE_LLD_DIAGNOSTICS_CRASH`` environment variable is now available to force LLD to crash. 
 
 Breaking changes
 ----------------
Index: lld/test/ELF/crash-report.test
===================================================================
--- /dev/null
+++ lld/test/ELF/crash-report.test
@@ -0,0 +1,9 @@
+## Test the diagnostics produced when LLD crashes.
+
+## Unset LLD_IN_TEST as its engages a crash recovery context.
+# RUN: env -u LLD_IN_TEST FORCE_LLD_DIAGNOSTICS_CRASH=1 not --crash ld.lld -o /dev/null 2>&1 | FileCheck %s
+
+## Check the crash text has the correct structure.
+# CHECK: crashing due to environment variable FORCE_LLD_DIAGNOSTICS_CRASH
+# CHECK: PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
+# CHECK: Stack dump: