shithub: riscv

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ref: 51950fd7893f962cfe4b39cf504b868dda89f228
parent: df3bb51a1c27e5499e6c80997bfd25db376e3242
author: Ori Bernstein <ori@eigenstate.org>
date: Tue Aug 29 15:58:35 EDT 2023

ms2html: fix crash on macro without newline

when processing an unterminated macro, we would pop
the last input file too early, leading to an invalid
stack access; only pop if we're not the last item on
the stack.

--- a/sys/src/cmd/ms2html.c

+++ b/sys/src/cmd/ms2html.c

@@ -684,13 +684,13 @@

 	lastsrc = Input;

 	for(;;) {

-		if(ssp < sstack)

-			return -1;

 		c = Bgetrune(&ssp->in);

 		if(c >= 0){

 			r = c;

 			break;

 		}

+		if(ssp == sstack)

+			return -1;

 		close(ssp->fd);

 		ssp--;

 	}