2 files changed, 9 insertions, 0 deletions
diff --git a/lib/std/debug/no_panic.zig b/lib/std/debug/no_panic.zig
index 934751b937..ccecc89a87 100644
--- a/lib/std/debug/no_panic.zig
+++ b/lib/std/debug/no_panic.zig
@@ -135,6 +135,11 @@ pub fn memcpyAlias() noreturn {
     @trap();
 }
 
+pub fn memmoveLenMismatch() noreturn {
+    @branchHint(.cold);
+    @trap();
+}
+
 pub fn noreturnReturned() noreturn {
     @branchHint(.cold);
     @trap();
diff --git a/lib/std/debug/simple_panic.zig b/lib/std/debug/simple_panic.zig
index 21016f395a..724061021f 100644
--- a/lib/std/debug/simple_panic.zig
+++ b/lib/std/debug/simple_panic.zig
@@ -128,6 +128,10 @@ pub fn memcpyAlias() noreturn {
     call("@memcpy arguments alias", null);
 }
 
+pub fn memmoveLenMismatch() noreturn {
+    call("@memmove arguments have non-equal lengths", null);
+}
+
 pub fn noreturnReturned() noreturn {
     call("'noreturn' function returned", null);
 }