Your message dated Sun, 18 Oct 2026 15:50:18 +0000
with message-id <[email protected]>
and subject line Bug#1146590: fixed in tinyarray 1.2.5-2
has caused the Debian Bug report #1146590,
regarding tinyarray: FTBFS on arm64
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1146590: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1146590
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: src:tinyarray
Version: 1.2.5-1
User: [email protected]
Usertags: python3.15
Tags: patch, ftbfs, forky, sid
Hi!
While rebuilding the python related packages against the Python 3.15rc1
version we found that tinyarray fails to build from source on arm64 [1].
This also fails on Debian's buildds [2].
It fails in arm64 with: Failed: DID NOT RAISE OverflowError
When converting floats to integer, `std::numeric_limits<long>::max()`
(2^63 - 1) rounds up to 2^63 in float/double, causing `*ptr > max()` to
be false for 2^63. The subsequent check on the cast integer relied on
architecture-specific overflow behavior that does not hold on ARM64
(where out-of-range floats saturate to positive INT64_MAX instead of
negative values).
So, to fix it, check bounds against exact power-of-two limits before
casting to detect overflow portably across architectures.
I applied the fix in the sandbox [3] to be able to build the packages
that depend on tinyarray, please consider applying the patch to support
the upcoming 3.15 version.
Happy hacking,
[1]: https://debusine.debian.net/debian/r-python-python3.15/artifact/4316397/
[2]:
https://buildd.debian.org/status/fetch.php?pkg=tinyarray&arch=arm64&ver=1.2.5-1&stamp=1766523038&raw=0
[3]: https://debusine.debian.net/debian/r-python-python3.15/
--
"Can you imagine what I would do if I could do all I can?" -- Sun Tzu
Saludos /\/\ /\ >< `/
Description: Fix float-to-integer overflow detection across architectures
When converting floats to integer, std::numeric_limits<long>::max() (2^63 - 1)
rounds up to 2^63 in float/double, causing *ptr > max() to be false for 2^63.
The subsequent check on the cast integer relied on architecture-specific
overflow behavior that does not hold on ARM64 (where out-of-range floats
saturate to positive INT64_MAX instead of negative values).
.
Check bounds against exact power-of-two limits before casting to detect
overflow portably across architectures.
Author: Maximiliano Curia <[email protected]>
diff --git a/src/conversion.hh b/src/conversion.hh
index bb7de89..7da9563 100644
--- a/src/conversion.hh
+++ b/src/conversion.hh
@@ -177,22 +177,18 @@ inline long number_from_ptr<long, unsigned long long>(const void *data)
template<typename Tdest, typename Tsrc>
inline Tdest _int_from_floatptr_exact(const void *data)
{
- const Tsrc *ptr = reinterpret_cast<const Tsrc*>(data);
- Tdest result = static_cast<Tdest>(*ptr);
-
- // Note: the > max and < min tests are unreliable since the floating point
- // representation of the maximal/minimal value may not be exact. The two
- // other tests catch these problems. This approach looks flimsy and is
- // implementation-dependent, but it is tested rigourosly.
- if (*ptr > std::numeric_limits<Tdest>::max() ||
- *ptr < std::numeric_limits<Tdest>::min() ||
- (*ptr > 0 && result < 0) || (*ptr < 0 && result > 0)) {
+ const Tsrc val = *reinterpret_cast<const Tsrc*>(data);
+ const Tsrc min_val = static_cast<Tsrc>(std::numeric_limits<Tdest>::min());
+ const Tsrc max_val_plus_1 = -min_val;
+ const Tsrc min_minus_1 = min_val - static_cast<Tsrc>(1);
+ const bool underflow = (min_minus_1 < min_val) ? (val <= min_minus_1) : (val < min_val);
+
+ if (!(val < max_val_plus_1) || underflow) {
PyErr_Format(PyExc_OverflowError,
"Float too large to be represented by long");
return -1;
- } else
- {
- return result;
+ } else {
+ return static_cast<Tdest>(val);
}
}
--- End Message ---
--- Begin Message ---
Source: tinyarray
Source-Version: 1.2.5-2
Done: Margarita Manterola <[email protected]>
We believe that the bug you reported is fixed in the latest version of
tinyarray, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Margarita Manterola <[email protected]> (supplier of updated tinyarray package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 18 Oct 2026 14:09:13 +0200
Source: tinyarray
Architecture: source
Version: 1.2.5-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Python Team <[email protected]>
Changed-By: Margarita Manterola <[email protected]>
Closes: 1017051 1146590
Changes:
tinyarray (1.2.5-2) unstable; urgency=medium
.
* Team upload.
* Add fix-float-to-integer-conversion.patch to fix missing overflow error on
several non-amd64 architectures (Closes: #1146590).
* Add fix-32bit-integer-hash.patch to fix wrong hash values for certain
numbers on 32bit architectures (Closes: #1017051).
* Add fix-armhf-alignment.patch to solve alignment issuees on armhf and
possibly other architectures.
* Update Standards-Version to 4.7.4: drop Priority field from
debian/control.
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