rustc SIGSEGV on RISC-V when building simple Hello World on Ubuntu in stable and nightly version

Hello.

I ran in a rustc error while running cargo build --release on a Ubuntu 24.4 .0.
I tried to experiment with rust on RISC-V, i installed the build-essential bevor installing rust.
I installed the Stable Version and encountered an error while compiling the basic Hello World program which i get by running
cargo init in a directory. For the compile i ran cargo build --release and encountered a SIGSEGV. I tested the exact same way with the exact version on a Debian 12 x86_64 system and encountered no issue. I also checked if the nightly version listed below encounters the same issue, yes it does. I will attach the stacktrace, version and system information below, hope thats everything you need, if anything is missing please let me know.

RISC-V

Version Stable

rustc --version --verbose
rustc 1.96.0 (ac68faa20 2026-05-25)
binary: rustc
commit-hash: ac68faa20c58cbccd01ee7208bf3b6e93a7d7f96
commit-date: 2026-05-25
host: riscv64gc-unknown-linux-gnu
release: 1.96.0
LLVM version: 22.1.2

cargo --version --verbose
cargo 1.96.0 (30a34c682 2026-05-25)
release: 1.96.0
commit-hash: 30a34c6821b57de0aaec83a901aca39f88f6778c
commit-date: 2026-05-25
host: riscv64gc-unknown-linux-gnu
libgit2: 1.9.2 (sys:0.20.4 vendored)
libcurl: 8.19.0-DEV (sys:0.4.87+curl-8.19.0 vendored ssl:OpenSSL/3.5.4)
ssl: OpenSSL 3.5.4 30 Sep 2025
os: Ubuntu 24.4.0 (noble) [64-bit]

Version Nightly

rustc --version --verbose
rustc 1.98.0-nightly (485ec3fbc 2026-06-10)
binary: rustc
commit-hash: 485ec3fbcc12fa14ef6596dabb125ad710499c9e
commit-date: 2026-06-10
host: riscv64gc-unknown-linux-gnu
release: 1.98.0-nightly
LLVM version: 22.1.6

cargo --version --verbose
cargo 1.98.0-nightly (0b1123a48 2026-06-01)
release: 1.98.0-nightly
commit-hash: 0b1123a48825309b697312b44fdb64b3df00c958
commit-date: 2026-06-01
host: riscv64gc-unknown-linux-gnu
libgit2: 1.9.4 (sys:0.21.0 vendored)
libcurl: 8.20.0-DEV (sys:0.4.88+curl-8.20.0 vendored ssl:OpenSSL/3.6.2)
ssl: OpenSSL 3.6.2 7 Apr 2026
os: Ubuntu 24.4.0 (noble) [64-bit]

x86_64 Debian

Version Stable

rustc --version --verbose                                                                                     
rustc 1.96.0 (ac68faa20 2026-05-25)
binary: rustc
commit-hash: ac68faa20c58cbccd01ee7208bf3b6e93a7d7f96
commit-date: 2026-05-25
host: x86_64-unknown-linux-gnu
release: 1.96.0
LLVM version: 22.1.2

cargo --version --verbose                                                                                      
cargo 1.96.0 (30a34c682 2026-05-25)
release: 1.96.0
commit-hash: 30a34c6821b57de0aaec83a901aca39f88f6778c
commit-date: 2026-05-25
host: x86_64-unknown-linux-gnu
libgit2: 1.9.2 (sys:0.20.4 vendored)
libcurl: 8.19.0-DEV (sys:0.4.87+curl-8.19.0 vendored ssl:OpenSSL/3.5.4)
ssl: OpenSSL 3.5.4 30 Sep 2025
os: Debian 12.0.0 (bookworm) [64-bit]

Stacktrace

Stable

cargo build --release
   Compiling rust-test6 v0.1.0 (/home/<user>/rust-test6)
error: rustc interrupted by SIGSEGV, printing backtrace

/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(+0xdddcb4)[0x3fa8e59cb4]
linux-vdso.so.1(__vdso_rt_sigreturn+0x0)[0x3fb43da800]
/lib/riscv64-linux-gnu/libc.so.6(syscall+0x1c)[0x3fa7fb3eac]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(_RNvMNtNtNtNtCs5MV44isskXG_3std3sys4sync5mutex5futexNtB2_5Mutex14lock_contended+0x96)[0x3fa8c93408]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(_RNvMNtNtNtNtCs5MV44isskXG_3std3sys4sync7condvar5futexNtB2_7Condvar4wait+0xaa)[0x3faf2ae8d0]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(+0x72142a6)[0x3faf2902a6]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(+0x72159ec)[0x3faf2919ec]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(+0x7216b9a)[0x3faf292b9a]
/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-93dfc950481021c5.so(+0x725792e)[0x3faf2d392e]
/lib/riscv64-linux-gnu/libc.so.6(+0x710d6)[0x3fa7f630d6]
/lib/riscv64-linux-gnu/libc.so.6(+0xc3934)[0x3fa7fb5934]

note: we would appreciate a report at https://github.com/rust-lang/rust
help: you can increase rustc's stack size by setting RUST_MIN_STACK=268435456
error: could not compile `rust-test6` (bin "rust-test6")

Caused by:
  process didn't exit successfully: `/home/<user>/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/rustc --crate-name rust_test6 --edition=2024 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=243 --crate-type bin --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=b6b00c2a189442ed -C extra-filename=-07eeaa4a9ec4e703 --out-dir /home/<user>/rust-test6/target/release/deps -C strip=debuginfo -L dependency=/home/<user>/rust-test6/target/release/deps` (signal: 11, SIGSEGV: invalid memory reference)

Nightly

cargo build --release
   Compiling rust-test6-nightly v0.1.0 (/home/<user>/rust-test6-nightly)
error: rustc interrupted by SIGSEGV, printing backtrace

/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(+0xd7a3ee)[0x3fa86b83ee]
linux-vdso.so.1(__vdso_rt_sigreturn+0x0)[0x3fb3f42800]
/lib/riscv64-linux-gnu/libc.so.6(syscall+0x1c)[0x3fa7875eac]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(_RNvMNtNtNtNtCs1cDhzN1Mo2y_3std3sys4sync5mutex5futexNtB2_5Mutex14lock_contended+0x96)[0x3fa852e98c]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(_RNvMNtNtNtNtCs1cDhzN1Mo2y_3std3sys4sync7condvar5futexNtB2_7Condvar4wait+0xaa)[0x3faed8a8c8]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(+0x74303ca)[0x3faed6e3ca]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(+0x742f81c)[0x3faed6d81c]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(+0x742f9a2)[0x3faed6d9a2]
/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/../lib/librustc_driver-620f3b43f6d4b7eb.so(+0x7471a0e)[0x3faedafa0e]
/lib/riscv64-linux-gnu/libc.so.6(+0x710d6)[0x3fa78250d6]
/lib/riscv64-linux-gnu/libc.so.6(+0xc3934)[0x3fa7877934]

note: we would appreciate a report at https://github.com/rust-lang/rust
help: you can increase rustc's stack size by setting RUST_MIN_STACK=268435456
error: could not compile `rust-test6-nightly` (bin "rust-test6-nightly")

Caused by:
  process didn't exit successfully: `/home/<user>/.rustup/toolchains/nightly-riscv64gc-unknown-linux-gnu/bin/rustc --crate-name rust_test6_nightly --edition=2024 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=121 --crate-type bin --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=de074db0159cd67e -C extra-filename=-10b8e939ad9d89b7 --out-dir /home/<user>/rust-test6-nightly/target/release/deps -C strip=debuginfo -L dependency=/home/<user>/rust-test6-nightly/target/release/deps` (signal: 11, SIGSEGV: invalid memory reference)

The failure occurs in rustc invoked by cargo build --release for src/main.rs on riscv64gc-unknown-linux-gnu; start by reproducing the minimal cargo init project on Ubuntu and comparing the stable and nightly stack traces with the x86_64 result. Done means the same Hello World release build completes without SIGSEGV on RISC-V.