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patch 8.2.0920: writing viminfo fails with a circular reference

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Problem:    Writing viminfo fails with a circular reference.
Solution:   Use copyID to detect the cycle. (closes #6217)
This commit is contained in:
Bram Moolenaar
2020-06-07 16:08:08 +02:00
parent 673fc3e23f
commit 5b157fe2ed
3 changed files with 52 additions and 2 deletions
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30
src/viminfo.c
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@@ -1337,8 +1337,34 @@ write_viminfo_varlist(FILE *fp)
case VAR_STRING: s = "STR"; break;
case VAR_NUMBER: s = "NUM"; break;
case VAR_FLOAT: s = "FLO"; break;
case VAR_DICT: s = "DIC"; break;
case VAR_LIST: s = "LIS"; break;
case VAR_DICT:
{
dict_T *di = this_var->di_tv.vval.v_dict;
int copyID = get_copyID();
s = "DIC";
if (di != NULL && !set_ref_in_ht(
&di->dv_hashtab, copyID, NULL)
&& di->dv_copyID == copyID)
// has a circular reference, can't turn the
// value into a string
continue;
break;
}
case VAR_LIST:
{
list_T *l = this_var->di_tv.vval.v_list;
int copyID = get_copyID();
s = "LIS";
if (l != NULL && !set_ref_in_list_items(
l, copyID, NULL)
&& l->lv_copyID == copyID)
// has a circular reference, can't turn the
// value into a string
continue;
break;
}
case VAR_BLOB: s = "BLO"; break;
case VAR_BOOL: s = "XPL"; break; // backwards compat.
case VAR_SPECIAL: s = "XPL"; break;