gbranden pushed a commit to branch master
in repository groff.
commit 75321a3ab4a779cc542c91cbc304b372774243f4
Author: G. Branden Robinson <[email protected]>
AuthorDate: Sat Oct 4 01:33:20 2025 -0500
[troff]: Add assertion.
* src/roff/troff/env.cpp (environment::hyphenate_line): Add assertion
for an apparently impossible scenario. The formatter should not
attempt to hyphenate an output line with no nodes in it. An output
line containing no nodes is nonsense.
---
ChangeLog | 7 +++++++
src/roff/troff/env.cpp | 1 +
2 files changed, 8 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index 0b8ed3b5b..6751b4937 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2025-10-04 G. Branden Robinson <[email protected]>
+
+ * src/roff/troff/env.cpp (environment::hyphenate_line): Add
+ assertion for an apparently impossible scenario. The formatter
+ should not attempt to hyphenate an output line with no nodes in
+ it. An output line containing no nodes is nonsense.
+
2025-09-30 G. Branden Robinson <[email protected]>
* tmac/an-ext.tmac: Tweak `EX`/`EE` behavior for more flexible
diff --git a/src/roff/troff/env.cpp b/src/roff/troff/env.cpp
index d9649211f..134f328a0 100644
--- a/src/roff/troff/env.cpp
+++ b/src/roff/troff/env.cpp
@@ -2152,6 +2152,7 @@ void environment::hyphenate_line(bool must_break_here)
break;
prev_type = this_type;
}
+ assert(*startp != 0 /* nullptr */);
if (*startp == 0 /* nullptr */)
return;
node *tem = *startp;
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