patch 8.2.2503: Vim9: a caught error may leave something on the stack
Problem: Vim9: a caught error may leave something on the stack.
Solution: Drop items from the stack if needed. (closes #7826)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 6d462ea..8febf36 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -24,7 +24,8 @@
// Structure put on ec_trystack when ISN_TRY is encountered.
typedef struct {
- int tcd_frame_idx; // ec_frame_idx when ISN_TRY was encountered
+ int tcd_frame_idx; // ec_frame_idx at ISN_TRY
+ int tcd_stack_len; // size of ectx.ec_stack at ISN_TRY
int tcd_catch_idx; // instruction of the first catch
int tcd_finally_idx; // instruction of the finally block
int tcd_caught; // catch block entered
@@ -2561,6 +2562,7 @@
++ectx.ec_trystack.ga_len;
++trylevel;
trycmd->tcd_frame_idx = ectx.ec_frame_idx;
+ trycmd->tcd_stack_len = ectx.ec_stack.ga_len;
trycmd->tcd_catch_idx = iptr->isn_arg.try.try_catch;
trycmd->tcd_finally_idx = iptr->isn_arg.try.try_finally;
trycmd->tcd_caught = FALSE;
@@ -2632,6 +2634,12 @@
if (trycmd->tcd_return)
goto func_return;
+
+ while (ectx.ec_stack.ga_len > trycmd->tcd_stack_len)
+ {
+ --ectx.ec_stack.ga_len;
+ clear_tv(STACK_TV_BOT(0));
+ }
}
}
break;