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authorMark H Weaver <mhw@netris.org>2021-01-07 15:15:24 -0500
committerMaxim Cournoyer <maxim.cournoyer@gmail.com>2021-01-08 14:10:33 -0500
commit485ac28235bf8775914b905060266b09629c1bac (patch)
tree439f53946741042630e8f24ec12580837b6a96c9 /tests/accounts.scm
parent8027711ee8708c130b30be43da7908e0e04d6972 (diff)
downloadguix-485ac28235bf8775914b905060266b09629c1bac.tar.gz
guix-485ac28235bf8775914b905060266b09629c1bac.zip
utils: Allow text substitution even in the presence of NUL characters.
Fixes <https://issues.guix.gnu.org/30116>. Before this change, the presence of a NUL character on a line meant that the (glibc) regexp engine used by Guile would either 1. stop scanning the string or 2. crash with the error "string contains #\\nul character", depending on the locale used. This change works around this limitation by first replacing the NUL character by an unused Unicode code point, doing the substitution, then reverting the replacement. * guix/build/utils.scm (unused-private-use-code-point) (replace-char): New procedures. (substitute): Make use of the above procedures to work around the NUL character regexp engine limitation. * tests/build-utils.scm: Add tests. Co-authored-by: Maxim Cournoyer <maxim.cournoyer@gmail.com> Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
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