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47 randomness in jit_stencils.h · Issue #138061 · python/cpython · GitHub
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randomness in jit_stencils.h #138061

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#138131
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randomness in jit_stencils.h#138061
#138131
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buildThe build process and cross-buildinterpreter-core(Objects, Python, Grammar, and Parser dirs)topic-JITtype-bugAn unexpected behavior, bug, or error
@bmwiedemann

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@bmwiedemann
bmwiedemann
opened on Aug 22, 2025

Bug report

Bug description:

While working on reproducible builds for openSUSE, I found that
our Python-3.14.0rc2 package has random variations in one of its files:

--- old//usr/src/debug/Python-3.14.0rc2/jit_stencils-x86_64-suse-linux-gnu.h
+++ new//usr/src/debug/Python-3.14.0rc2/jit_stencils-x86_64-suse-linux-gnu.h
@@ -1,4 +1,4 @@
-// 758e10176251ef35b7d8475a699dd17f8f18825312fcdd02e2e0aaa535e2898b
+// fb9d76f68f8171b81f54501d168e608c09472dc74015ec545a1e862b2bbbbf40
 // $ python3.13 ./Tools/jit/build.py x86_64-suse-linux-gnu --output-dir . --pyconfig-dir . --cflags=

 void

It would be better to have all build outputs deterministic.

related: https://bugzilla.opensuse.org/show_bug.cgi?id=1244680

CPython versions tested on:

3.14

Operating systems tested on:

Linux

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