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--- Singular-Release-4-2-1p3/kernel/groebner_walk/walkSupport.cc.orig	2021-12-17 11:35:18.000000000 -0700
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+++ Singular-Release-4-2-1p3/kernel/groebner_walk/walkSupport.cc	2022-07-25 13:16:57.297425786 -0600
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@@ -12,7 +12,7 @@
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 #include "kernel/groebner_walk/walkSupport.h"
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 #include "kernel/GBEngine/kstd1.h"
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-EXTERN_VAR BOOLEAN overflow_error;
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+EXTERN_VAR int overflow_error;
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 ///////////////////////////////////////////////////////////////////
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 //Support functions for Groebner Walk and Fractal Walk