[Pkg-rust-maintainers] Bug#1114356: rust-harfbuzz-sys: FTBFS: error: test failed, to rerun pass `--lib`

Santiago Vila sanvila at debian.org
Fri Sep 5 19:25:36 BST 2025


Package: src:rust-harfbuzz-sys
Version: 0.5.0+really.0.4.1-5
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, your package failed to build.

Below you will find how the build ends (probably the most relevant part,
but not necessarily). If required, the full build log is available here:

https://people.debian.org/~sanvila/build-logs/202509/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you could not reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:rust-harfbuzz-sys, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
 debian/rules clean
dh clean --buildsystem cargo
   dh_auto_clean -O--buildsystem=cargo
debian cargo wrapper: options = ['parallel=2'], profiles = [], parallel = ['-j2'], lto = 
debian cargo wrapper: rust_type = x86_64-unknown-linux-gnu, gnu_type = x86_64-linux-gnu
debian cargo wrapper: running subprocess (['env', 'RUST_BACKTRACE=1', '/usr/bin/cargo', 'clean', '--verbose', '--verbose'],) {'check': True}
     Removed 0 files
   dh_autoreconf_clean -O--buildsystem=cargo
   dh_clean -O--buildsystem=cargo
 debian/rules binary
dh binary --buildsystem cargo
   dh_update_autotools_config -O--buildsystem=cargo
   dh_autoreconf -O--buildsystem=cargo
   dh_auto_configure -O--buildsystem=cargo

[... snipped ...]

     |
1381 |         unsafe { &(*(::std::ptr::null::<hb_glyph_extents_t>())).width as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:1391:19
     |
1391 |         unsafe { &(*(::std::ptr::null::<hb_glyph_extents_t>())).height as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2184:19
     |
2184 |         unsafe { &(*(::std::ptr::null::<hb_glyph_info_t>())).codepoint as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2194:19
     |
2194 |         unsafe { &(*(::std::ptr::null::<hb_glyph_info_t>())).mask as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2204:19
     |
2204 |         unsafe { &(*(::std::ptr::null::<hb_glyph_info_t>())).cluster as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2214:19
     |
2214 |         unsafe { &(*(::std::ptr::null::<hb_glyph_info_t>())).var1 as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2224:19
     |
2224 |         unsafe { &(*(::std::ptr::null::<hb_glyph_info_t>())).var2 as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2294:19
     |
2294 |         unsafe { &(*(::std::ptr::null::<hb_glyph_position_t>())).x_advance as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2304:19
     |
2304 |         unsafe { &(*(::std::ptr::null::<hb_glyph_position_t>())).y_advance as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2314:19
     |
2314 |         unsafe { &(*(::std::ptr::null::<hb_glyph_position_t>())).x_offset as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2324:19
     |
2324 |         unsafe { &(*(::std::ptr::null::<hb_glyph_position_t>())).y_offset as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2334:19
     |
2334 |         unsafe { &(*(::std::ptr::null::<hb_glyph_position_t>())).var as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2375:14
     |
2375 |             &(*(::std::ptr::null::<hb_segment_properties_t>())).direction as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2386:19
     |
2386 |         unsafe { &(*(::std::ptr::null::<hb_segment_properties_t>())).script as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2397:14
     |
2397 |             &(*(::std::ptr::null::<hb_segment_properties_t>())).language as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2409:14
     |
2409 |             &(*(::std::ptr::null::<hb_segment_properties_t>())).reserved1 as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:2421:14
     |
2421 |             &(*(::std::ptr::null::<hb_segment_properties_t>())).reserved2 as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3067:19
     |
3067 |         unsafe { &(*(::std::ptr::null::<hb_ot_name_entry_t>())).name_id as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3077:19
     |
3077 |         unsafe { &(*(::std::ptr::null::<hb_ot_name_entry_t>())).var as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3087:19
     |
3087 |         unsafe { &(*(::std::ptr::null::<hb_ot_name_entry_t>())).language as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3203:19
     |
3203 |         unsafe { &(*(::std::ptr::null::<hb_ot_color_layer_t>())).glyph as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3213:19
     |
3213 |         unsafe { &(*(::std::ptr::null::<hb_ot_color_layer_t>())).color_index as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3709:14
     |
3709 |             &(*(::std::ptr::null::<hb_ot_math_glyph_variant_t>())).glyph as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3721:14
     |
3721 |             &(*(::std::ptr::null::<hb_ot_math_glyph_variant_t>())).advance as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3773:19
     |
3773 |         unsafe { &(*(::std::ptr::null::<hb_ot_math_glyph_part_t>())).glyph as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3784:14
     |
3784 |             &(*(::std::ptr::null::<hb_ot_math_glyph_part_t>())).start_connector_length as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3797:14
     |
3797 |             &(*(::std::ptr::null::<hb_ot_math_glyph_part_t>())).end_connector_length as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3810:14
     |
3810 |             &(*(::std::ptr::null::<hb_ot_math_glyph_part_t>())).full_advance as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:3821:19
     |
3821 |         unsafe { &(*(::std::ptr::null::<hb_ot_math_glyph_part_t>())).flags as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4068:14
     |
4068 |             &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).axis_index as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4079:19
     |
4079 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).tag as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4089:19
     |
4089 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).name_id as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4099:19
     |
4099 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).flags as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4109:19
     |
4109 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).min_value as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4120:14
     |
4120 |             &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).default_value as *const _ as usize
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4131:19
     |
4131 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).max_value as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4141:19
     |
4141 |         unsafe { &(*(::std::ptr::null::<hb_ot_var_axis_info_t>())).reserved as *const _ as usize },
     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4681:14
     |
4681 |             &(*(::std::ptr::null::<hb_aat_layout_feature_selector_info_t>())).name_id as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4694:14
     |
4694 |             &(*(::std::ptr::null::<hb_aat_layout_feature_selector_info_t>())).enable as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4707:14
     |
4707 |             &(*(::std::ptr::null::<hb_aat_layout_feature_selector_info_t>())).disable as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: dereferencing a null pointer
    --> src/lib.rs:4720:14
     |
4720 |             &(*(::std::ptr::null::<hb_aat_layout_feature_selector_info_t>())).reserved as *const _
     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this code causes undefined behavior when executed

warning: `harfbuzz-sys` (lib test) generated 68 warnings
    Finished `test` profile [unoptimized + debuginfo] target(s) in 3.16s
     Running `CARGO=/usr/bin/cargo CARGO_MANIFEST_DIR=/<<PKG [too-long-redacted] /harfbuzz_sys-f08c0562ba6f00b1`

running 15 tests

thread 'bindgen_test_layout__hb_var_int_t' panicked at src/lib.rs:56:18:
null pointer dereference occurred
stack backtrace:
   0: rust_begin_unwind
             at /usr/src/rustc-1.86.0/library/std/src/panicking.rs:695:5
   1: core::panicking::panic_nounwind_fmt::runtime
             at /usr/src/rustc-1.86.0/library/core/src/panicking.rs:117:22
   2: core::panicking::panic_nounwind_fmt
             at /usr/src/rustc-1.86.0/library/core/src/intrinsics/mod.rs:3886:9
   3: core::panicking::panic_null_pointer_dereference
             at /usr/src/rustc-1.86.0/library/core/src/panicking.rs:304:5
   4: harfbuzz_sys::bindgen_test_layout__hb_var_int_t
             at /usr/share/cargo/registry/harfbuzz-sys-0.5.0+really.0.4.1/src/lib.rs:56:18
   5: harfbuzz_sys::bindgen_test_layout__hb_var_int_t::{{closure}}
             at /usr/share/cargo/registry/harfbuzz-sys-0.5.0+really.0.4.1/src/lib.rs:44:39
   6: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.86.0/library/core/src/ops/function.rs:250:5
   7: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.86.0/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
thread caused non-unwinding panic. aborting.
error: test failed, to rerun pass `--lib`

Caused by:
  process didn't exit successfully: `CARGO=/usr/bin/cargo CA [too-long-redacted]  SIGABRT: process abort signal)
dh_auto_test: error: /usr/share/cargo/bin/cargo test --all returned exit code 101
make[1]: *** [debian/rules:7: override_dh_auto_test] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:3: binary] Error 2
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
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