Re: pkg/60059: math/gnumeric 10.0_2025Q4 segfaults on RPi4

[Ramiro Aceves <ea1abz%gmail.com@localhost>]

El 11/3/26 a las 20:30, Benny Siegert via gnats escribió:
> The following reply was made to PR pkg/60059; it has been noted by GNATS.
>
> From: Benny Siegert <bsiegert%netbsd.org@localhost>
> To: Ramiro Aceves <ea1abz%gmail.com@localhost>
> Cc: gnats-bugs%netbsd.org@localhost, pkg-manager%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
>      pkgsrc-bugs%netbsd.org@localhost
> Subject: Re: pkg/60059: math/gnumeric 10.0_2025Q4 segfaults on RPi4
> Date: Wed, 11 Mar 2026 19:28:46 +0000 (UTC)
>
>   >>  Changing from "long double" to "double" inside
>   >>  fmt-fp function in the file
>   >>  /usr/pkgsrc/misc/goffice0.10/work/goffice-0.10.60/goffice/math
>   >>  fixes de crash.
>   >>
>   >>  I do not know how to properly fix it only for aarch64 and if it is a
>   >>  proper fix.
>   
>   Thanks, this is actually helpful! At the risk of being flamed to death, I
>   used Gemini to explain the cause of the crash. It suggests that this is a
>   pointer underflow specifically on aarch64, because the calculation of the
>   array size in that function is wrong. It suggests this patch:
>   
>   --- go-dtoa.c
>   +++ go-dtoa.c
>   @@ -227,7 +227,7 @@
>     	if (y) y *= 0x1p28, e2-=28;
>   
>     	if (e2<0) a=r=z=big;
>   -	else a=r=z=big+sizeof(big)/sizeof(*big) - LDBL_MANT_DIG - 1;
>   +	else a=r=z=big+sizeof(big)/sizeof(*big) - (LDBL_MANT_DIG+28)/9 - 1;
>   
>     	do {
>     		*z = y;
>   
>   It also suggests that the code is lifted from musl libc :)
>   
>   Can you try recompiling goffice0.10 with this change?
>   
>   Thanks!
>   
>   --
>   Benny
>   

Hello Benny,

I have recompiled goffice changing only one line manually as you told but it segfaults again (make replace):



netbsd-raspa4# diff -Nru  /usr/pkgsrc/misc/goffice0.10/work/goffice-0.10.59/goffice/math/go-dtoa.c.orig 
/usr/pkgsrc/misc/goffice0.10/work/goffice-0.10.59/goffice/math/go-dtoa.c
--- /usr/pkgsrc/misc/goffice0.10/work/goffice-0.10.59/goffice/math/go-dtoa.c.orig	2025-03-01 22:10:00.000000000 +0100
+++ /usr/pkgsrc/misc/goffice0.10/work/goffice-0.10.59/goffice/math/go-dtoa.c	2026-03-15 09:09:03.728612918 +0100
@@ -49,6 +49,14 @@
 #define go_finitel isfinite
 #endif

+#if defined(__NetBSD__)
+#if (__NetBSD_Version__ >= 699001700)
+/* in <math.h> in newer NetBSDs, should already be included */
+#else
+/* OK, this will lose precision and range, but what else to do? */
+#define frexpl(ldv,i)	(long double)frexp((double)ldv, i)
+#endif
+#endif /* __NetBSD__ */

 /* musl code starts here */

@@ -234,7 +242,8 @@
 	if (y) y *= 0x1p28, e2-=28;

 	if (e2<0) a=r=z=big;
-	else a=r=z=big+sizeof(big)/sizeof(*big) - LDBL_MANT_DIG - 1;
+/*else a=r=z=big+sizeof(big)/sizeof(*big) - LDBL_MANT_DIG - 1;*/
+	else a=r=z=big+sizeof(big)/sizeof(*big) - (LDBL_MANT_DIG+28)/9 - 1;

 	do {
 		*z = y;
netbsd-raspa4#


netbsd-raspa4$ gdb /usr/pkg/bin/gnumeric
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Reading symbols from /usr/pkg/bin/gnumeric...
(No debugging symbols found in /usr/pkg/bin/gnumeric)
(gdb) run
Starting program: /usr/pkg/bin/gnumeric
[New LWP 1771 of process 10389]
[New LWP 28988 of process 10389]
[New LWP 21892 of process 10389]
[New LWP 8735 of process 10389]

(gnumeric:10389): GVFS-RemoteVolumeMonitor-WARNING **: 09:37:26.260: cannot open directory /usr/pkg/share/gvfs/remote-volume-monitors: Falló al abrir 
la carpeta «/usr/pkg/share/gvfs/remote-volume-monitors»: No such file or directory
[New LWP 27385 of process 10389]

Thread 1 "" received signal SIGSEGV, Segmentation fault.
0x0000fde79e13a13c in fmt_fp (f=f@entry=0xfde796a92400, y=inf, y@entry=0,
    w=w@entry=1, p=<optimized out>, p@entry=0, fl=fl@entry=536870918,
    t=t@entry=70) at math/go-dtoa.c:249
249			*z = y;
(gdb)
(gdb) list
244		if (e2<0) a=r=z=big;
245	/*else a=r=z=big+sizeof(big)/sizeof(*big) - LDBL_MANT_DIG - 1;*/
246		else a=r=z=big+sizeof(big)/sizeof(*big) - (LDBL_MANT_DIG+28)/9 - 1;
247	
248		do {
249			*z = y;
250			y = 1000000000*(y-*z++);
251		} while (y);
252	
253		while (e2>0) {
(gdb)

Regards.
Ramiro.