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vim-patch:8.2.3419: a failing debug expression may make Vim unusable

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Problem:    A failing debug expression may make Vim unusable.
Solution:   Suppress error messages. (closes vim/vim#8848)
0325d3967c
This commit is contained in:
Sean Dewar
2021-09-13 17:09:15 +01:00
parent 936c4ae151
commit 31ac33bf77
2 changed files with 9 additions and 19 deletions
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24
src/nvim/debugger.c
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@@ -454,22 +454,14 @@ static garray_T prof_ga = { 0, 0, sizeof(struct debuggy), 4, NULL };
#define DBG_EXPR 3
/// Evaluate the "bp->dbg_name" expression and return the result.
/// Restore the got_int and called_emsg flags.
static typval_T *eval_expr_restore(struct debuggy *const bp)
/// Disables error messages.
static typval_T *eval_expr_no_emsg(struct debuggy *const bp)
FUNC_ATTR_NONNULL_ALL
{
const int prev_called_emsg = called_emsg;
const int prev_did_emsg = did_emsg;
got_int = false;
// Disable error messages, a bad expression would make Vim unusable.
emsg_off++;
typval_T *const tv = eval_expr(bp->dbg_name);
// Evaluating the expression should not result in breaking the sequence of
// commands.
got_int = false;
called_emsg = prev_called_emsg;
did_emsg = prev_did_emsg;
emsg_off--;
return tv;
}
@@ -535,7 +527,7 @@ static int dbg_parsearg(char_u *arg, garray_T *gap)
bp->dbg_name = vim_strsave(curbuf->b_ffname);
} else if (bp->dbg_type == DBG_EXPR) {
bp->dbg_name = vim_strsave(p);
bp->dbg_val = eval_expr_restore(bp);
bp->dbg_val = eval_expr_no_emsg(bp);
} else {
// Expand the file name in the same way as do_source(). This means
// doing it twice, so that $DIR/file gets expanded when $DIR is
@@ -791,7 +783,7 @@ debuggy_find(
} else if (bp->dbg_type == DBG_EXPR) {
bool line = false;
typval_T *const tv = eval_expr_restore(bp);
typval_T *const tv = eval_expr_no_emsg(bp);
if (tv != NULL) {
if (bp->dbg_val == NULL) {
debug_oldval = typval_tostring(NULL);
@@ -804,7 +796,7 @@ debuggy_find(
line = true;
debug_oldval = typval_tostring(bp->dbg_val);
// Need to evaluate again, typval_compare() overwrites "tv".
typval_T *const v = eval_expr_restore(bp);
typval_T *const v = eval_expr_no_emsg(bp);
debug_newval = typval_tostring(v);
tv_free(bp->dbg_val);
bp->dbg_val = v;