--- a/python/mozbuild/mozbuild/mach_commands.py
+++ b/python/mozbuild/mozbuild/mach_commands.py
@@ -1321,16 +1321,17 @@ class RunProgram(MachCommandBase):
                 if not os.path.isdir(path):
                     os.makedirs(path)
                 args.append('-profile')
                 args.append(path)
 
         extra_env = {
             'MOZ_DEVELOPER_REPO_DIR': self.topsrcdir,
             'MOZ_DEVELOPER_OBJ_DIR': self.topobjdir,
+            'RUST_BACKTRACE': '1',
         }
 
         if not enable_crash_reporter:
             extra_env['MOZ_CRASHREPORTER_DISABLE'] = '1'
         else:
             extra_env['MOZ_CRASHREPORTER'] = '1'
 
         if disable_e10s: