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fix heredoc crash

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we emitted an error on heredoc tags, but we
continued on, and added a heredoc entry to
the list, with a tag that we couldn't handle.

when processing this heredoc, rc would segfault.

fix: don't add a heredoc to the list on error.
This commit is contained in:
Ori Bernstein 2020-03-09 14:24:02 -07:00
parent 698837e715
commit fc90f7a666
1 changed files with 6 additions and 2 deletions
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8
sys/src/cmd/rc/here.c
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@ -22,9 +22,13 @@ hexnum(char *p, int n)
tree* tree*
heredoc(tree *tag) heredoc(tree *tag)
{ {
struct here *h = new(struct here); struct here *h;
if(tag->type!=WORD)
if(tag->type!=WORD){
yyerror("Bad here tag"); yyerror("Bad here tag");
return nil;
}
h = new(struct here);
h->next = 0; h->next = 0;
if(here) if(here)
*ehere = h; *ehere = h;