box: use stacked diagnostic area for functional indexes

Since we've introduced stacked diagnostic in previous commit, let's use
it in the code implementing functional indexes.

Part of #1148

src/box/key_list.c

@@ -63,9 +63,9 @@ key_list_iterator_create(struct key_list_iterator *it, struct tuple *tuple,
 	if (rc != 0) {
 		/* Can't evaluate function. */
 		struct space *space = space_by_id(index_def->space_id);
-		diag_set(ClientError, ER_FUNC_INDEX_FUNC, index_def->name,
+		diag_add(ClientError, ER_FUNC_INDEX_FUNC, index_def->name,
 			 space ? space_name(space) : "",
-			 diag_last_error(diag_get())->errmsg);
+			 "can't evaluate function");
 		return -1;
 	}
 	uint32_t key_data_sz;
@@ -74,9 +74,9 @@ key_list_iterator_create(struct key_list_iterator *it, struct tuple *tuple,
 	if (key_data == NULL) {
 		struct space *space = space_by_id(index_def->space_id);
 		/* Can't get a result returned by function . */
-		diag_set(ClientError, ER_FUNC_INDEX_FUNC, index_def->name,
+		diag_add(ClientError, ER_FUNC_INDEX_FUNC, index_def->name,
 			 space ? space_name(space) : "",
-			 diag_last_error(diag_get())->errmsg);
+			 "can't get a value returned by function");
 		return -1;
 	}
 
@@ -170,9 +170,9 @@ key_list_iterator_next(struct key_list_iterator *it, const char **value)
 		 * The key doesn't follow functional index key
 		 * definition.
 		 */
-		diag_set(ClientError, ER_FUNC_INDEX_FORMAT, it->index_def->name,
+		diag_add(ClientError, ER_FUNC_INDEX_FORMAT, it->index_def->name,
 			 space ? space_name(space) : "",
-			 diag_last_error(diag_get())->errmsg);
+			 "key does not follow functional index definition");
 		return -1;
 	}
 

src/box/lua/call.c

@@ -687,9 +687,9 @@ func_persistent_lua_load(struct func_lua *func)
 	if (func->base.def->is_sandboxed) {
 		if (prepare_lua_sandbox(tarantool_L, default_sandbox_exports,
 					nelem(default_sandbox_exports)) != 0) {
-			diag_set(ClientError, ER_LOAD_FUNCTION,
-				func->base.def->name,
-				diag_last_error(diag_get())->errmsg);
+			diag_add(ClientError, ER_LOAD_FUNCTION,
+				 func->base.def->name,
+				 "can't prepare a Lua sandbox");
 			goto end;
 		}
 	} else {

test/engine/func_index.result

@@ -5,6 +5,14 @@ test_run = require('test_run').new()
 engine = test_run:get_cfg('engine')
  | ---
  | ...
+test_run:cmd("push filter \"file: .*\" to \"file: <filename>\"")
+ | ---
+ | - true
+ | ...
+test_run:cmd("push filter \"line: .*\" to \"line: <line>\"")
+ | ---
+ | - true
+ | ...
 
 --
 -- gh-1260: Func index.
@@ -158,8 +166,7 @@ idx = s:create_index('idx', {func = box.func.invalidreturn1.id, parts = {{1, 'un
 s:insert({1})
  | ---
  | - error: 'Key format doesn''t match one defined in functional index ''idx'' of space
- |     ''withdata'': Supplied key type of part 0 does not match index part type: expected
- |     unsigned'
+ |     ''withdata'': key does not follow functional index definition'
  | ...
 idx:drop()
  | ---
@@ -197,8 +204,7 @@ idx = s:create_index('idx', {func = box.func.invalidreturn3.id, parts = {{1, 'un
 s:insert({1})
  | ---
  | - error: 'Key format doesn''t match one defined in functional index ''idx'' of space
- |     ''withdata'': Supplied key type of part 0 does not match index part type: expected
- |     unsigned'
+ |     ''withdata'': key does not follow functional index definition'
  | ...
 idx:drop()
  | ---
@@ -217,8 +223,7 @@ idx = s:create_index('idx', {func = box.func.invalidreturn4.id, parts = {{1, 'un
 s:insert({1})
  | ---
  | - error: 'Key format doesn''t match one defined in functional index ''idx'' of space
- |     ''withdata'': Supplied key type of part 0 does not match index part type: expected
- |     unsigned'
+ |     ''withdata'': key does not follow functional index definition'
  | ...
 idx:drop()
  | ---
@@ -264,8 +269,41 @@ idx = s:create_index('idx', {func = box.func.runtimeerror.id, parts = {{1, 'stri
 s:insert({1})
  | ---
  | - error: 'Failed to build a key for functional index ''idx'' of space ''withdata'':
- |     [string "return function(tuple)                 local ..."]:1: attempt to call
- |     global ''require'' (a nil value)'
+ |     can''t evaluate function'
+ | ...
+e = box.error.last()
+ | ---
+ | ...
+e:unpack()
+ | ---
+ | - code: 198
+ |   trace:
+ |   - file: <filename>
+ |     line: <line>
+ |   type: ClientError
+ |   message: 'Failed to build a key for functional index ''idx'' of space ''withdata'':
+ |     can''t evaluate function'
+ |   prev: '[string "return function(tuple)                 local ..."]:1: attempt to
+ |     call global ''require'' (a nil value)'
+ | ...
+e = e.prev
+ | ---
+ | ...
+e:unpack()
+ | ---
+ | - type: LuajitError
+ |   message: '[string "return function(tuple)                 local ..."]:1: attempt
+ |     to call global ''require'' (a nil value)'
+ |   trace:
+ |   - file: <filename>
+ |     line: <line>
+ | ...
+e = e.prev
+ | ---
+ | ...
+e == nil
+ | ---
+ | - true
  | ...
 idx:drop()
  | ---

test/engine/func_index.test.lua

 test_run = require('test_run').new()
 engine = test_run:get_cfg('engine')
+test_run:cmd("push filter \"file: .*\" to \"file: <filename>\"")
+test_run:cmd("push filter \"line: .*\" to \"line: <line>\"")
 
 --
 -- gh-1260: Func index.
@@ -99,6 +101,12 @@ test_run:cmd("setopt delimiter ''");
 box.schema.func.create('runtimeerror', {body = lua_code, is_deterministic = true, is_sandboxed = true})
 idx = s:create_index('idx', {func = box.func.runtimeerror.id, parts = {{1, 'string'}}})
 s:insert({1})
+e = box.error.last()
+e:unpack()
+e = e.prev
+e:unpack()
+e = e.prev
+e == nil
 idx:drop()
 
 -- Remove old persistent functions