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patch 9.0.1317: crash when using an unset object variable

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Problem:    Crash when using an unset object variable.
Solution:   Give an error instead. (closes #12005)
This commit is contained in:
Bram Moolenaar
2023-02-17 21:08:50 +00:00
parent eea0a00811
commit 552bdca781
4 changed files with 34 additions and 7 deletions
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6
src/errors.h
View File

@@ -1182,6 +1182,8 @@ EXTERN char e_invalid_command[]
INIT(= N_("E476: Invalid command"));
EXTERN char e_invalid_command_str[]
INIT(= N_("E476: Invalid command: %s"));
EXTERN char e_invalid_command_str_expected_str[]
INIT(= N_("E476: Invalid command: %s, expected %s"));
EXTERN char e_no_bang_allowed[]
INIT(= N_("E477: No ! allowed"));
EXTERN char e_dont_panic[]
@@ -3442,6 +3444,6 @@ EXTERN char e_using_super_not_in_child_class[]
INIT(= N_("E1358: Using \"super\" not in a child class"));
EXTERN char e_cannot_define_new_function_in_abstract_class[]
INIT(= N_("E1359: Cannot define a \"new\" function in an abstract class"));
EXTERN char e_invalid_command_str_expected_str[]
INIT(= N_("E476: Invalid command: %s, expected %s"));
EXTERN char e_using_null_object[]
INIT(= N_("E1360: Using a null object"));
#endif

15
src/testdir/test_vim9_class.vim
View File

@@ -182,6 +182,21 @@ def Test_class_interface_wrong_end()
v9.CheckScriptFailure(lines, 'E476: Invalid command: endclass, expected endinterface')
enddef
def Test_object_not_set()
var lines =<< trim END
vim9script
class State
this.value = 'xyz'
endclass
var state: State
var db = {'xyz': 789}
echo db[state.value]
END
v9.CheckScriptFailure(lines, 'E1360:')
enddef
def Test_class_member_initializer()
var lines =<< trim END
vim9script

2
src/version.c
View File

@@ -695,6 +695,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1317,
/**/
1316,
/**/

18
src/vim9class.c
View File

@@ -1234,9 +1234,6 @@ class_object_index(
evalarg_T *evalarg,
int verbose UNUSED) // give error messages
{
// int evaluate = evalarg != NULL
// && (evalarg->eval_flags & EVAL_EVALUATE);
if (VIM_ISWHITE((*arg)[1]))
{
semsg(_(e_no_white_space_allowed_after_str_str), ".", *arg);
@@ -1250,8 +1247,19 @@ class_object_index(
return FAIL;
size_t len = name_end - name;
class_T *cl = rettv->v_type == VAR_CLASS ? rettv->vval.v_class
: rettv->vval.v_object->obj_class;
class_T *cl;
if (rettv->v_type == VAR_CLASS)
cl = rettv->vval.v_class;
else // VAR_OBJECT
{
if (rettv->vval.v_object == NULL)
{
emsg(_(e_using_null_object));
return FAIL;
}
cl = rettv->vval.v_object->obj_class;
}
if (*name_end == '(')
{
int on_class = rettv->v_type == VAR_CLASS;