arg: fix ASAN error on sampler_type_names empty (#18167)

ngxson · web-flow · commit 4d1316c440e7 · 2025-12-18T14:30:32.000+01:00
diff --git a/common/arg.cpp b/common/arg.cpp
@@ -873,7 +873,9 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
         sampler_type_chars += common_sampler_type_to_chr(sampler);
         sampler_type_names += common_sampler_type_to_str(sampler) + ";";
     }
-    sampler_type_names.pop_back();
+    if (!sampler_type_names.empty()) {
+        sampler_type_names.pop_back(); // remove last semicolon
+    }
 
 
     /**

Original file line number	Diff line number	Diff line change
`@@ -873,7 +873,9 @@ common_params_context common_params_parser_init(common_params & params, llama_ex`
`873`	`873`	`sampler_type_chars += common_sampler_type_to_chr(sampler);`
`874`	`874`	`sampler_type_names += common_sampler_type_to_str(sampler) + ";";`
`875`	`875`	`}`
`876`		`- sampler_type_names.pop_back();`
	`876`	`+ if (!sampler_type_names.empty()) {`
	`877`	`+ sampler_type_names.pop_back(); // remove last semicolon`
	`878`	`+ }`
`877`	`879`
`878`	`880`
`879`	`881`	`/**`