Fixed panic handling on REPL input.

The Lua debug module is mandatory now.

components/lua/Kconfig

@@ -72,7 +72,7 @@ menu "Lua configuration"
             bool "UTF8 module"
             default "y"
             help
-                Includes the debug module.
+                Includes the debug module (required by our Lua VM).
 
         config LUA_BUILTIN_DEBUG
             bool "Debug module"
@@ -124,5 +124,6 @@ menu "Lua configuration"
       default y
       select NODEMCU_CMODULE_PIPE
       select NODEMCU_CMODULE_UART
+      select LUA_BUILTIN_DEBUG
 
 endmenu

components/lua/common/lpanic.c

@@ -2,6 +2,7 @@
 #include "lauxlib.h"
 #include <stdint.h>
 #include <stdlib.h>
+#include <stdio.h>
 #ifndef LUA_CROSS_COMPILER
 #include "esp_system.h"
 /* defined in esp_system_internal.h */
@@ -33,7 +34,7 @@ int panic_get_nvval() {
 #endif
 
 
-int panic (lua_State *L) {
+int lpanic (lua_State *L) {
   (void)L;  /* to avoid warnings */
 #ifndef LUA_CROSS_COMPILER
   uint8_t paniclevel = panic_get_nvval();
@@ -43,6 +44,7 @@ int panic (lua_State *L) {
   lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
                    lua_tostring(L, -1));
 #ifndef LUA_CROSS_COMPILER
+  fflush(stdout);
   /* call abort() directly - we don't want another reset cause to intervene */
   esp_reset_reason_set_hint(ESP_RST_PANIC);
 #endif

components/lua/common/lpanic.h

@@ -5,6 +5,6 @@
 
 void panic_clear_nvval (void);
 int panic_get_nvval (void);
-int panic (lua_State *L);
+int lpanic (lua_State *L);
 
 #endif

components/lua/lua-5.1/lauxlib.c

@@ -917,7 +917,7 @@ LUALIB_API void luaL_assertfail(const char *file, int line, const char *message)
 LUALIB_API lua_State *luaL_newstate (void) {
   lua_State *L = lua_newstate(l_alloc, NULL);
   lua_setallocf(L, l_alloc, L); /* allocator need lua_State. */
-  if (L) lua_atpanic(L, &panic);
+  if (L) lua_atpanic(L, lpanic);
   return L;
 }
 

components/lua/lua-5.3/lauxlib.c

@@ -1104,7 +1104,7 @@ static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
 
 LUALIB_API lua_State *luaL_newstate (void) {
   lua_State *L = lua_newstate(l_alloc, NULL);
-  if (L) lua_atpanic(L, &panic);
+  if (L) lua_atpanic(L, lpanic);
   return L;
 }