From 8dc3eca49ba4203fb28ae4d70f3bfac35442199a Mon Sep 17 00:00:00 2001
From: Patrick Jackson <PatrickSJackson@gmail.com>
Date: Mon, 24 Apr 2017 03:39:48 -0700
Subject: [PATCH] api/dispatch: Mark generated functions table readonly (#6576)

---
 scripts/geneval.lua | 1 +
 src/nvim/eval.c     | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/scripts/geneval.lua b/scripts/geneval.lua
index b1ba76296c..b17ecb1a0c 100644
--- a/scripts/geneval.lua
+++ b/scripts/geneval.lua
@@ -41,6 +41,7 @@ funcsdata:close()
 gperfpipe:write([[
 %language=ANSI-C
 %global-table
+%readonly-tables
 %define initializer-suffix ,0,0,NULL,NULL
 %define word-array-name functions
 %define hash-function-name hash_internal_func_gperf
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index d7feed8bfd..c02d172458 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -6009,7 +6009,7 @@ char_u *get_expr_name(expand_T *xp, int idx)
 /// @param[in]  name  Name of the function.
 ///
 /// Returns pointer to the function definition or NULL if not found.
-static VimLFuncDef *find_internal_func(const char *const name)
+static const VimLFuncDef *find_internal_func(const char *const name)
   FUNC_ATTR_WARN_UNUSED_RESULT FUNC_ATTR_PURE FUNC_ATTR_NONNULL_ALL
 {
   size_t len = strlen(name);
@@ -6378,7 +6378,7 @@ call_func(
       }
     } else {
       // Find the function name in the table, call its implementation.
-      VimLFuncDef *const fdef = find_internal_func((const char *)fname);
+      const VimLFuncDef *const fdef = find_internal_func((const char *)fname);
       if (fdef != NULL) {
         if (argcount < fdef->min_argc) {
           error = ERROR_TOOFEW;