Rustdoc cann't build rust documentation with custom libdir.

[o01eg]

Looks like something related to #45345

 Documenting core v0.0.0 (file:///tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libcore)
     Running `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --crate-name core libcore/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps`
rustdoc command: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc" "--crate-name" "core" "libcore/lib.rs" "--target" "x86_64-unknown-linux-gnu" "-o" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "--cfg" "stage1" "--cfg" "dox" "--sysroot" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1" "-Z" "force-unstable-if-unmarked" "--linker" "x86_64-pc-linux-gnu-gcc" "-Z" "unstable-options" "-Z" "unstable-options" "--crate-version" "1.29.0-dev (d334027c5 2018-07-12)"
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc: error while loading shared libraries: librustc_driver-8d7fdf72b3fbbc6b.so: cannot open shared object file: No such file or directory
error: Could not document `core`.

Caused by:
  process didn't exit successfully: `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --crate-name core libcore/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps` (exit code: 127)


command did not execute successfully: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "doc" "--target" "x86_64-unknown-linux-gnu" "-j" "1" "-v" "--release" "--locked" "--features" "panic-unwind jemalloc backtrace" "--manifest-path" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libstd/Cargo.toml" "--no-deps" "-p" "alloc" "-p" "core" "-p" "std" "-p" "std_unicode"
expected success, got: exit code: 101

but file exists:

$ find /tmp/portage/ -name librustc_driver-8d7fdf72b3fbbc6b.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/lib64/rust-9999/rustlib/x86_64-unknown-linux-gnu/lib/librustc_driver-8d7fdf72b3fbbc6b.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/lib/librustc_driver-8d7fdf72b3fbbc6b.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib64/rust-9999/rustlib/x86_64-unknown-linux-gnu/lib/librustc_driver-8d7fdf72b3fbbc6b.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_driver-8d7fdf72b3fbbc6b.so

config.toml:

[llvm]
optimize = true
release-debuginfo = false
assertions = false
targets = "X86;Mips;NVPTX;BPF;AArch64"
[build]
build = "x86_64-unknown-linux-gnu"
host = ["x86_64-unknown-linux-gnu"]
target = ["i686-unknown-linux-gnu","x86_64-unknown-linux-gnu","wasm32-unknown-unknown"]
docs = true
submodules = false
python = "python2.7"
locked-deps = true
vendor = false
verbose = 2
sanitizers = true
extended = true
tools=["src", "rls", "analysis", "rustfmt", "clippy"]
[install]
prefix = "/usr"
libdir = "lib64/rust-9999"
docdir = "share/doc/rust-9999"
mandir = "share/rust-9999/man"
[rust]
optimize = true
debuginfo = false
debug-assertions = false
use-jemalloc = true
default-linker = "x86_64-pc-linux-gnu-gcc"
rpath = false
ignore-git = false
lld = true
llvm-tools = true
[target.i686-unknown-linux-gnu]
cc = "x86_64-pc-linux-gnu-gcc"
cxx = "x86_64-pc-linux-gnu-g++"
linker = "x86_64-pc-linux-gnu-gcc"
ar = "x86_64-pc-linux-gnu-ar"
[target.x86_64-unknown-linux-gnu]
cc = "x86_64-pc-linux-gnu-gcc"
cxx = "x86_64-pc-linux-gnu-g++"
linker = "x86_64-pc-linux-gnu-gcc"
ar = "x86_64-pc-linux-gnu-ar"
[target.wasm32-unknown-unknown]

Affected rust version: 2d5a295

Known to work revision: 478226c

[o01eg]

It was broken in #51917

[o01eg]

Looks like it gets RUSTDOC_LIBDIR=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib while libraries are placed in:

/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/lib64/rust-9999/rustlib/x86_64-unknown-linux-gnu/lib/librustc_driver-dd8d6be268880e27.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/lib/librustc_driver-dd8d6be268880e27.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib64/rust-9999/rustlib/x86_64-unknown-linux-gnu/lib/librustc_driver-dd8d6be268880e27.so
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_driver-dd8d6be268880e27.so

 Documenting core v0.0.0 (file:///tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libcore)                                                                                                                                               
       Fresh cmake v0.1.31                                                                                                                                                                                                                    
     Running `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustc --crate-name core libcore/lib.rs --crate-type lib --emit=dep-info,metadata -C opt-level=2 -C metadata=df73258a79ae0cfb -C extra-filename=-df73258a
79ae0cfb --out-dir /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust
-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps`                              
     Running `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --crate-name core libcore/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-lin
ux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/w
ork/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps`                                                                                                                                                                      
rustc command: "LD_LIBRARY_PATH"="/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib:/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps:/tmp/po
rtage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage0/lib" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/bin/rustc" "--crate-name" "core" "libcore/lib.rs" "--crate-type
" "lib" "--emit=dep-info,metadata" "-C" "opt-level=2" "-C" "metadata=df73258a79ae0cfb-rustc" "-C" "extra-filename=-df73258a79ae0cfb" "--out-dir" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/bu i l dCompiling/x8 6std_ v640-.u0n.k0no (wnfile:///tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libstd-)l
inux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "--target" "x86_64-unknown-linux-gnu" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rus t - g i tRunning-s r`/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_6$-unknown-linux-gnu/stage1-std/release/build/std-e87c01deeb8aee92/build-script-build`c
/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "--cfg" "stage1" "--sysroot" "/t$p/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1" "-Cprefer-dynamic" "-Clinker=x86_64-pc-linux-gnu-gcc" "-C" "debug-assertions=n" "-Z" "force-unstable-if-unmarked" "-Dwarnings"
sysroot: "/tmp/portagrustdoc command: e/d"e/vt-mlpa/npgo/rrtuasgte-/9d9e9v9-/lwaonrgk//rruusstt--9g9i9t9-/swrocr/kb/uriulsdt/-xg8i6t_-6s4r-cu/nbkuniolwdn/-xl8i6n_u6x4--gunnuk/nsotwang-el1i"n
ulibdir: x"-/gtnmup//sptoargtea2g/eb/idne/vr-ulsatndgo/cr"u s"t---9c9r9a9t/ew-onrakm/er"u s"tc-ogriet"- s"rlci/bbcuoirled//lxi8b6._r6s4"- u"n-k-ntoawrng-elti"n u"xx-8g6n_u6/4s-tuangken1o/wlni-bl"i
nux-gnu" "-o" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/st$ge1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "--cfg" "stage1" "--cfg" "dox" "--sysroot" "/tmp/portage/dev-lang/r$st-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1" "-Z" "force-unstable-if-unmarked" "--linker" "x86_64-pc-linux-gnu-gcc" "-Z" "unstable-options" "-Z" "unstable-options" "--crate-version" "1.29.0-dev (3d5753fda 2018-07-16)"$ RUSTDOC_LIBDIR: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib"
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc: error while loading shared libraries: librustc_driver-dd8d6be268880e27.so: cannot open shared object file: No such file or directory
error: Could not document `core`.

Caused by:
  process didn't exit successfully: `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --crate-name core libcore/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/$uild/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/port$ge/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps` (exit code: 127)
warning: build failed, waiting for other jobs to finish...
error: build failed


command did not execute successfully: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "doc" "--target" "x86_64-unknown-linux-gnu" "-j" "7" "-v" "--release" "--locked" "--features" "pani$-unwind jemalloc backtrace" "--manifest-path" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libstd/Cargo.toml" "--no-deps" "-p" "alloc" "-p" "core" "-p" "std" "-p" "std_unicode"
expected success, got: exit code: 101

[o01eg]

Looks like it went back in recent commits 4d66b7b:

 Documenting alloc v0.0.0 (/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/liballoc)
     Running `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --edition=2018 --crate-name alloc src/liballoc/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc --markdown-css rust.css --markdown-no-toc --generate-redirect-pages --index-page /tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/doc/index.md -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps --extern compiler_builtins=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcompiler_builtins-a1d726fb784e7a79.rmeta --extern core=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcore-c5a981d603a5e0b9.rmeta`
rustdoc command: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc" "--edition=2018" "--crate-name" "alloc" "src/liballoc/lib.rs" "--target" "x86_64-unknown-linux-gnu" "-o" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc" "--markdown-css" "rust.css" "--markdown-no-toc" "--generate-redirect-pages" "--index-page" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/doc/index.md" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps" "-L" "dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps" "--extern" "compiler_builtins=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcompiler_builtins-a1d726fb784e7a79.rmeta" "--extern" "core=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcore-c5a981d603a5e0b9.rmeta" "--cfg" "stage1" "--cfg" "dox" "--sysroot" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1" "-Z" "force-unstable-if-unmarked" "--linker" "x86_64-pc-linux-gnu-gcc" "-Z" "unstable-options" "-Z" "unstable-options" "--crate-version" "1.34.0-dev (4d66b7b76 2019-02-19)"
libdir: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1/lib"
/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage2/bin/rustdoc: error while loading shared libraries: librustc_driver-86e4db5b82fc213f.so: cannot open shared object file: No such file or directory
error: Could not document `alloc`.

Caused by:
  process didn't exit successfully: `/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/bootstrap/debug/rustdoc --edition=2018 --crate-name alloc src/liballoc/lib.rs --target x86_64-unknown-linux-gnu -o /tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/doc --markdown-css rust.css --markdown-no-toc --generate-redirect-pages --index-page /tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/doc/index.md -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/release/deps --extern compiler_builtins=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcompiler_builtins-a1d726fb784e7a79.rmeta --extern core=/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage1-std/x86_64-unknown-linux-gnu/release/deps/libcore-c5a981d603a5e0b9.rmeta` (exit code: 127)


command did not execute successfully: "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "rustdoc" "--target" "x86_64-unknown-linux-gnu" "-j" "7" "-v" "--release" "--locked" "--features" "panic-unwind backtrace" "--manifest-path" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/libstd/Cargo.toml" "-Z" "unstable-options" "-p" "alloc" "--" "--markdown-css" "rust.css" "--markdown-no-toc" "--generate-redirect-pages" "--index-page" "/tmp/portage/dev-lang/rust-9999/work/rust-git-src/src/doc/index.md"
expected success, got: exit code: 101