gbranden pushed a commit to branch master
in repository groff.
commit de6d3118aab9c681a7955506cddde044a7387f77
Author: G. Branden Robinson <[email protected]>
AuthorDate: Fri Sep 19 19:48:03 2025 -0500
PROBLEMS: Document the damnable pnmcrop warning.
---
PROBLEMS | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/PROBLEMS b/PROBLEMS
index 9326face9..30999327e 100644
--- a/PROBLEMS
+++ b/PROBLEMS
@@ -55,6 +55,31 @@ following line at each place where you expect the break to
occur.
----------------------------------------------------------------------
+* I sometimes get errors from PNM utilties when using grohtml.
+ pnmcrop: The image is entirely background; there is nothing to crop.
+
+This appears to be a spurious warning, and given the same input to the
+same version of groff, it appears with some versions of the PNM tools
+but not others (and the generated image is, in fact, not blank.)
+
+For example, for groff's developers, Netpbm 10.0 (Debian 2:10.0-15.4 on
+amd64) does not produce the warning spuriously, but Netpbm 10.73.43
+(Debian 1:10.73.43-5 on aarch64) does.
+
+A test exhibit follows if someone would like to help the Netpbm
+developers chase down this defect.
+
+--- start ---
+.TS
+L.
+foobar
+.TE
+--- end ---
+
+Use "groff -t -Thtml" with the foregoing input.
+
+----------------------------------------------------------------------
+
[groff 1.19.2]
* When viewing man pages, some characters on my UTF-8 terminal emulator
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