diff --git a/.idea/runConfigurations/tyche_test.xml b/.idea/runConfigurations/tyche_test.xml
index c5c7393..f658405 100644
--- a/.idea/runConfigurations/tyche_test.xml
+++ b/.idea/runConfigurations/tyche_test.xml
@@ -1,10 +1,9 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="tyche-test" type="CLionNativeAppRunConfigurationType" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="tyche" TARGET_NAME="tyche-test" CONFIG_NAME="tyche-test" version="1" RUN_TARGET_PROJECT_NAME="tyche" RUN_TARGET_NAME="tyche-test">
+  <configuration default="false" name="tyche-test" type="CLionNativeAppRunConfigurationType" REDIRECT_INPUT="false" ELEVATE="false" USE_EXTERNAL_CONSOLE="false" EMULATE_TERMINAL="false" PASS_PARENT_ENVS_2="true" PROJECT_NAME="tyche" TARGET_NAME="tyche-test" CONFIG_NAME="tyche-test" version="1" RUN_PATH="$PROJECT_DIR$/tyche-test">
     <envs>
       <env name="MallocNanoZone" value="0" />
     </envs>
     <method v="2">
-      <option name="ToolBeforeRunTask" enabled="true" actionId="Tool_External Tools_clean" />
       <option name="CLION.COMPOUND.BUILD" enabled="true" />
     </method>
   </configuration>
diff --git a/lib/stack.c b/lib/stack.c
index 3b1f547..ccb92fb 100644
--- a/lib/stack.c
+++ b/lib/stack.c
@@ -81,7 +81,7 @@ static TYC_RESULT stack_at(Stack* s, int32_t key, VALUE* v)
             return T_ERR_STACK_ACCESS_OUT_OF_RANGE;
         *v = s->stack[stack_top_fp(s) + key];
     } else {
-        if ((int) stack_top_fp(s) + (int) s->stack_n + key < 0)
+        if ((int) s->stack_n + key < (int) stack_top_fp(s))
             return T_ERR_STACK_ACCESS_OUT_OF_RANGE;
         *v = s->stack[s->stack_n + key];
     }
@@ -96,7 +96,7 @@ static TYC_RESULT stack_set(Stack* s, int32_t key, VALUE v)
             return T_ERR_STACK_ACCESS_OUT_OF_RANGE;
         s->stack[stack_top_fp(s) + key] = v;
     } else {
-        if ((int) stack_top_fp(s) + (int) s->stack_n + key < 0)
+        if ((int) s->stack_n + key < (int) stack_top_fp(s))
             return T_ERR_STACK_ACCESS_OUT_OF_RANGE;
         s->stack[s->stack_n + key] = v;
     }