gbranden pushed a commit to branch master
in repository groff.
commit 44d0de30e0100e9922c07dff7031de199a112cc7
Author: G. Branden Robinson <[email protected]>
AuthorDate: Sat Dec 13 17:29:37 2025 -0600
[troff]: Reject `\s` after `\c` on a line.
* src/roff/troff/input.cpp (token::next): Reject `\s` escape sequence
after `\c` on an input line. Throw warning in category "syntax" and
don't interpret it at all.
---
ChangeLog | 6 ++++++
src/roff/troff/input.cpp | 6 ++++++
2 files changed, 12 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index df6abf605..4a86b719d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2025-12-13 G. Branden Robinson <[email protected]>
+
+ * src/roff/troff/input.cpp (token::next): Reject `\s` escape
+ sequence after `\c` on an input line. Throw warning in category
+ "syntax" and don't interpret it at all.
+
2025-12-13 G. Branden Robinson <[email protected]>
* src/roff/troff/env.cpp (environment::set_font): Move warning
diff --git a/src/roff/troff/input.cpp b/src/roff/troff/input.cpp
index 7db0fda5f..d08dfda3b 100644
--- a/src/roff/troff/input.cpp
+++ b/src/roff/troff/input.cpp
@@ -2587,6 +2587,12 @@ void token::next()
have_formattable_input = true;
break;
case 's':
+ if (curenv->get_was_line_interrupted()) {
+ warning(WARN_SYNTAX, "ignoring escaped '%1' on input line"
+ " after output line continuation escape sequence",
+ char(cc));
+ break;
+ }
if (read_size(&x))
curenv->set_size(x);
if (!want_att_compat)
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