Update of bug #65930 (group groff):
Status: None => Confirmed
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Follow-up Comment #1:
Hi Dave,
The `@f` trap macro is setting itself off recursively. This is not quite
obvious with `groff -b` but is if one instruments the `@t` macro.
$ git diff
diff --git a/tmac/e.tmac b/tmac/e.tmac
index 48962de54..7453f3e39 100644
--- a/tmac/e.tmac
+++ b/tmac/e.tmac
@@ -459,6 +459,7 @@ .de @e \" --- end page
.de @t \" --- output header or footer title
.if !\\n(?h \
\{\
+. do tm GBR: \\$0: \\$@
. sz \\n(tp\" \" set header/footer type fonts, etc.
. @F \\n(tf
. lt \\n(_Lu \" make title span entire page
$ ./build/test-groff -bz -me EXPERIMENTS/tv-stack-limit.me 2>&1|head -n 20
GBR: @t: "$h"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
GBR: @t: "$f"
Maybe we want to validate `tv` (and `dv`) values and enforce a limit...
...or maybe we should turn vertical position traps off while setting headers
and footers. I wonder if Allman contemplated titles taller than one vee; if
not, vertical spacing is irrelevant in that context.
...so maybe what we want to do is temporarily set vertical spacing to zero
inside headers and footers.
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