Diff of the two buildlogs:

--
--- b1/build.log	2025-03-20 00:36:58.101961336 +0000
+++ b2/build.log	2025-03-20 00:38:36.313509801 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Apr 21 18:58:45 -12 2026
-I: pbuilder-time-stamp: 1776841125
+I: Current time: Thu Mar 20 14:37:00 +14 2025
+I: pbuilder-time-stamp: 1742431020
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -22,51 +22,83 @@
 dpkg-source: info: unpacking rust-integer-sqrt_0.1.5-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3407694/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/D01_modify_environment starting
+debug: Running on infom01-amd64.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Mar 20 00:37 /bin/sh -> /bin/bash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='amd64'
-  DEBIAN_FRONTEND='noninteractive'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="37" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='7a1c1bf6392c49d5affd6ea65be3774f'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='3407694'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=61adfa977d094e8c85975423c694e680
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=2051803
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.nlIAPUuw/pbuilderrc_EarB --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.nlIAPUuw/b1 --logfile b1/build.log rust-integer-sqrt_0.1.5-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.nlIAPUuw/pbuilderrc_8wdI --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.nlIAPUuw/b2 --logfile b2/build.log rust-integer-sqrt_0.1.5-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
 I: uname -a
-  Linux infom02-amd64 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-32-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.129-1 (2025-03-06) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3407694/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -190,7 +222,7 @@
 Get: 78 http://deb.debian.org/debian unstable/main amd64 librust-autocfg-dev amd64 1.1.0-1+b2 [15.2 kB]
 Get: 79 http://deb.debian.org/debian unstable/main amd64 librust-libm-dev amd64 0.2.8-1 [95.8 kB]
 Get: 80 http://deb.debian.org/debian unstable/main amd64 librust-num-traits-dev amd64 0.2.19-2 [44.9 kB]
-Fetched 137 MB in 2s (70.4 MB/s)
+Fetched 137 MB in 6s (22.6 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:amd64.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19784 files and directories currently installed.)
@@ -465,8 +497,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Wed Apr 22 06:59:43 UTC 2026.
-Universal Time is now:  Wed Apr 22 06:59:43 UTC 2026.
+Local time is now:      Thu Mar 20 00:38:15 UTC 2025.
+Universal Time is now:  Thu Mar 20 00:38:15 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -537,7 +569,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/rust-integer-sqrt-0.1.5/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../rust-integer-sqrt_0.1.5-1_source.changes
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/rust-integer-sqrt-0.1.5/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../rust-integer-sqrt_0.1.5-1_source.changes
 dpkg-buildpackage: info: source package rust-integer-sqrt
 dpkg-buildpackage: info: source version 0.1.5-1
 dpkg-buildpackage: info: source distribution unstable
@@ -651,24 +687,24 @@
      Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=integer_sqrt CARGO_MANIFEST_DIR=/build/reproducible-path/rust-integer-sqrt-0.1.5 CARGO_MANIFEST_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/Cargo.toml CARGO_PKG_AUTHORS='Richard Dodd <richard.o.dodd@gmail.com>:Joseph Richey:Sergei Shulepov' CARGO_PKG_DESCRIPTION='An implementation of integer square root algorithm for primitive rust types' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0/MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=integer-sqrt CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/derekdreery/integer-sqrt-rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps rustc --crate-name integer_sqrt --edition=2015 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=389c962a5aef903b -C extra-filename=-6aeea1b5185466b6 --out-dir /build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -C incremental=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/incremental -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps --extern num_traits=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps/libnum_traits-d1a90a235480e563.rmeta -C debuginfo=2 -C strip=none --cap-lints warn -C linker=x86_64-linux-gnu-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /build/reproducible-path/rust-integer-sqrt-0.1.5=/usr/share/cargo/registry/integer-sqrt-0.1.5 --remap-path-prefix /build/reproducible-path/rust-integer-sqrt-0.1.5/debian/cargo_registry=/usr/share/cargo/registry`
 warning: `num-traits` (lib) generated 4 warnings
      Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=integer_sqrt CARGO_MANIFEST_DIR=/build/reproducible-path/rust-integer-sqrt-0.1.5 CARGO_MANIFEST_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/Cargo.toml CARGO_PKG_AUTHORS='Richard Dodd <richard.o.dodd@gmail.com>:Joseph Richey:Sergei Shulepov' CARGO_PKG_DESCRIPTION='An implementation of integer square root algorithm for primitive rust types' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0/MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=integer-sqrt CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/derekdreery/integer-sqrt-rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps rustc --crate-name integer_sqrt --edition=2015 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=a17ef83c0ab35077 -C extra-filename=-872c5db8bea8c2c8 --out-dir /build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -C incremental=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/incremental -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps --extern num_traits=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps/libnum_traits-d1a90a235480e563.rlib -C debuginfo=2 -C strip=none --cap-lints warn -C linker=x86_64-linux-gnu-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /build/reproducible-path/rust-integer-sqrt-0.1.5=/usr/share/cargo/registry/integer-sqrt-0.1.5 --remap-path-prefix /build/reproducible-path/rust-integer-sqrt-0.1.5/debian/cargo_registry=/usr/share/cargo/registry`
-    Finished `test` profile [unoptimized + debuginfo] target(s) in 3.00s
+    Finished `test` profile [unoptimized + debuginfo] target(s) in 2.20s
      Running `CARGO=/usr/bin/cargo CARGO_MANIFEST_DIR=/build/reproducible-path/rust-integer-sqrt-0.1.5 CARGO_MANIFEST_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/Cargo.toml CARGO_PKG_AUTHORS='Richard Dodd <richard.o.dodd@gmail.com>:Joseph Richey:Sergei Shulepov' CARGO_PKG_DESCRIPTION='An implementation of integer square root algorithm for primitive rust types' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0/MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=integer-sqrt CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/derekdreery/integer-sqrt-rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' LD_LIBRARY_PATH='/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps:/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug:/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib' /build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps/integer_sqrt-872c5db8bea8c2c8`
 
 running 12 tests
-test tests::i128_test ... ok
-test tests::i16_test ... ok
 test tests::i32_test ... ok
-test tests::i8_test ... ok
+test tests::i16_test ... ok
 test tests::i64_test ... ok
+test tests::i8_test ... ok
+test tests::i128_test ... ok
 test tests::isize_test ... ok
 test tests::u16_test ... ok
+test tests::u128_test ... ok
 test tests::u32_test ... ok
 test tests::u64_test ... ok
-test tests::u128_test ... ok
 test tests::u8_test ... ok
 test tests::usize_test ... ok
 
-test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
+test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
 
    Doc-tests integer_sqrt
      Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=integer_sqrt CARGO_MANIFEST_DIR=/build/reproducible-path/rust-integer-sqrt-0.1.5 CARGO_MANIFEST_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/Cargo.toml CARGO_PKG_AUTHORS='Richard Dodd <richard.o.dodd@gmail.com>:Joseph Richey:Sergei Shulepov' CARGO_PKG_DESCRIPTION='An implementation of integer square root algorithm for primitive rust types' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0/MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=integer-sqrt CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/derekdreery/integer-sqrt-rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' LD_LIBRARY_PATH=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps rustdoc --edition=2015 --crate-type lib --color auto --crate-name integer_sqrt --test src/lib.rs --test-run-directory /build/reproducible-path/rust-integer-sqrt-0.1.5 --target x86_64-unknown-linux-gnu -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/debug/deps --extern integer_sqrt=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps/libinteger_sqrt-6aeea1b5185466b6.rlib --extern num_traits=/build/reproducible-path/rust-integer-sqrt-0.1.5/target/x86_64-unknown-linux-gnu/debug/deps/libnum_traits-d1a90a235480e563.rlib -C embed-bitcode=no --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' --error-format human`
@@ -676,7 +712,7 @@
 running 1 test
 test src/lib.rs - (line 7) ... ok
 
-test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.28s
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.20s
 
 librust-num-traits-dev:amd64 0.2.19-2 0
 rustc 1.85.0+dfsg1-1 1
@@ -710,12 +746,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2051803/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/3407694 and its subdirectories
-I: Current time: Tue Apr 21 18:59:57 -12 2026
-I: pbuilder-time-stamp: 1776841197
+I: removing directory /srv/workspace/pbuilder/2051803 and its subdirectories
+I: Current time: Thu Mar 20 14:38:35 +14 2025
+I: pbuilder-time-stamp: 1742431115