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rustbuild --keep-stage 0 still rebuilds everything #44737

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arielb1 opened this issue Sep 21, 2017 · 3 comments
Closed

rustbuild --keep-stage 0 still rebuilds everything #44737

arielb1 opened this issue Sep 21, 2017 · 3 comments
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C-bug Category: This is a bug. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

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@arielb1
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arielb1 commented Sep 21, 2017 •
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Found to occur in commit e2504cf (Sep 21)

Description

config.toml content:

$ sed -r -e 's/^#.*$//' -e '/^$/d' config.toml
[llvm]
ccache = true
[build]
[install]
[rust]
debuginfo-lines = true
[target.x86_64-unknown-linux-gnu]
[dist]

$ echo 'FIRST BUILD' ; ../x.py build ; echo 'SECOND BUILD' ; ../x.py build --keep-stage 0 ; touch ../src/librustc/lib.rs ; echo 'THIRD BUILD'; ../x.py build --keep-stage 0
FIRST BUILD
Updating submodules
error: could not lock config file /home/ariel/Rust/rust/.git/modules/src/liblibc/config: File exists
    Finished dev [unoptimized] target(s) in 0.0 secs
Building stage0 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 test from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling rustc_metadata v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_metadata)
   Compiling rustc_save_analysis v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_save_analysis)
   Compiling rustc_mir v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_mir)
   Compiling rustc_trans v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans)
   Compiling rustc_borrowck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_borrowck)
   Compiling rustc_plugin v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_plugin)
   Compiling rustc_driver v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_driver)
   Compiling rustc-main v0.0.0 (file:///home/ariel/Rust/rust/src/rustc)
    Finished release [optimized] target(s) in 263.68 secs
Copying stage0 rustc from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage1 compiler (x86_64-unknown-linux-gnu)
Building stage1 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling core v0.0.0 (file:///home/ariel/Rust/rust/src/libcore)
   Compiling unwind v0.0.0 (file:///home/ariel/Rust/rust/src/libunwind)
   Compiling libc v0.0.0 (file:///home/ariel/Rust/rust/src/rustc/libc_shim)
   Compiling compiler_builtins v0.0.0 (file:///home/ariel/Rust/rust/src/rustc/compiler_builtins_shim)
   Compiling rustc_msan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_msan)
   Compiling rustc_lsan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_lsan)
   Compiling alloc_jemalloc v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc_jemalloc)
   Compiling rustc_tsan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_tsan)
   Compiling rustc_asan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_asan)
   Compiling std v0.0.0 (file:///home/ariel/Rust/rust/src/libstd)
   Compiling rand v0.0.0 (file:///home/ariel/Rust/rust/src/librand)
   Compiling std_unicode v0.0.0 (file:///home/ariel/Rust/rust/src/libstd_unicode)
   Compiling panic_abort v0.0.0 (file:///home/ariel/Rust/rust/src/libpanic_abort)
   Compiling alloc v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc)
   Compiling panic_unwind v0.0.0 (file:///home/ariel/Rust/rust/src/libpanic_unwind)
   Compiling collections v0.0.0 (file:///home/ariel/Rust/rust/src/libcollections)
   Compiling alloc_system v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc_system)
    Finished release [optimized] target(s) in 41.73 secs
Copying stage1 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling term v0.0.0 (file:///home/ariel/Rust/rust/src/libterm)
   Compiling getopts v0.2.14
   Compiling test v0.0.0 (file:///home/ariel/Rust/rust/src/libtest)
    Finished release [optimized] target(s) in 13.62 secs
Copying stage1 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling arena v0.0.0 (file:///home/ariel/Rust/rust/src/libarena)
   Compiling libc v0.2.30
   Compiling rustc-serialize v0.3.24
   Compiling bitflags v1.0.0
   Compiling ar v0.3.0
   Compiling log v0.3.8
   Compiling graphviz v0.0.0 (file:///home/ariel/Rust/rust/src/libgraphviz)
   Compiling rustc-demangle v0.1.5
   Compiling rustc_platform_intrinsics v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_platform_intrinsics)
   Compiling serialize v0.0.0 (file:///home/ariel/Rust/rust/src/libserialize)
   Compiling stable_deref_trait v1.0.0
   Compiling fmt_macros v0.0.0 (file:///home/ariel/Rust/rust/src/libfmt_macros)
   Compiling rustc_trans v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans)
   Compiling rustc v0.0.0 (file:///home/ariel/Rust/rust/src/librustc)
   Compiling rustc_driver v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_driver)
   Compiling rustc_cratesio_shim v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_cratesio_shim)
   Compiling rustc_metadata v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_metadata)
   Compiling jobserver v0.1.6
   Compiling num_cpus v1.6.2
   Compiling env_logger v0.4.3
   Compiling rustc_back v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_back)
   Compiling syntax v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax)
   Compiling owning_ref v0.3.3
   Compiling rustc_incremental v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_incremental)
   Compiling rustc_apfloat v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_apfloat)
   Compiling rustc_data_structures v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_data_structures)
   Compiling miniz-sys v0.1.9
   Compiling rls-span v0.4.0
   Compiling rustc_llvm v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_llvm)
   Compiling syntax_pos v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax_pos)
   Compiling rls-data v0.10.0
   Compiling flate2 v0.2.19
   Compiling rustc_errors v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_errors)
   Compiling proc_macro v0.0.0 (file:///home/ariel/Rust/rust/src/libproc_macro)
   Compiling rustc_const_math v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_const_math)
   Compiling syntax_ext v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax_ext)
   Compiling rustc_resolve v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_resolve)
   Compiling rustc_const_eval v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_const_eval)
   Compiling rustc_privacy v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_privacy)
   Compiling rustc_typeck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_typeck)
   Compiling rustc_trans_utils v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans_utils)
   Compiling rustc_allocator v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_allocator)
   Compiling rustc_lint v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_lint)
   Compiling rustc_mir v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_mir)
   Compiling rustc_passes v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_passes)
   Compiling rustc_save_analysis v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_save_analysis)
   Compiling rustc_plugin v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_plugin)
   Compiling rustc_borrowck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_borrowck)
   Compiling rustc-main v0.0.0 (file:///home/ariel/Rust/rust/src/rustc)
    Finished release [optimized] target(s) in 865.47 secs
Copying stage1 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage2 compiler (x86_64-unknown-linux-gnu)
Uplifting stage1 std (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 test (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building rustdoc for stage2 (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Build completed successfully in 0:19:50

    \--- COMMENT MINE: OK, BUILDS EVERYTHING

SECOND BUILD
Updating submodules
error: could not lock config file /home/ariel/Rust/rust/.git/modules/src/liblibc/config: File exists
    Finished dev [unoptimized] target(s) in 0.0 secs
Building stage0 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 test from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 rustc from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage1 compiler (x86_64-unknown-linux-gnu)
Building stage1 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage1 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage1 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage1 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage2 compiler (x86_64-unknown-linux-gnu)
Uplifting stage1 std (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 test (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building rustdoc for stage2 (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Build completed successfully in 0:00:04

    \--- COMMENT MINE: OK, IDENTITY REBUILD
    \--- (touched librustc)

THIRD BUILD
Updating submodules
error: could not lock config file /home/ariel/Rust/rust/.git/modules/src/liblibc/config: File exists
    Finished dev [unoptimized] target(s) in 0.0 secs
Building stage0 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 std from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Copying stage0 test from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage0 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling rustc v0.0.0 (file:///home/ariel/Rust/rust/src/librustc)
   Compiling rustc_allocator v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_allocator)
   Compiling rustc_resolve v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_resolve)
   Compiling rustc_trans_utils v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans_utils)
   Compiling rustc_metadata v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_metadata)
   Compiling rustc_const_eval v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_const_eval)
   Compiling rustc_typeck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_typeck)
   Compiling rustc_privacy v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_privacy)
   Compiling rustc_incremental v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_incremental)
   Compiling rustc_lint v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_lint)
   Compiling rustc_mir v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_mir)
   Compiling rustc_passes v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_passes)
   Compiling rustc_trans v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans)
   Compiling rustc_save_analysis v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_save_analysis)
   Compiling rustc_plugin v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_plugin)
   Compiling rustc_borrowck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_borrowck)
   Compiling rustc_driver v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_driver)
   Compiling rustc-main v0.0.0 (file:///home/ariel/Rust/rust/src/rustc)
    Finished release [optimized] target(s) in 645.93 secs
Copying stage0 rustc from stage0 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage1 compiler (x86_64-unknown-linux-gnu)
Building stage1 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling core v0.0.0 (file:///home/ariel/Rust/rust/src/libcore)
   Compiling libc v0.0.0 (file:///home/ariel/Rust/rust/src/rustc/libc_shim)
   Compiling unwind v0.0.0 (file:///home/ariel/Rust/rust/src/libunwind)
   Compiling compiler_builtins v0.0.0 (file:///home/ariel/Rust/rust/src/rustc/compiler_builtins_shim)
   Compiling rustc_lsan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_lsan)
   Compiling rustc_asan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_asan)
   Compiling rustc_msan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_msan)
   Compiling alloc_jemalloc v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc_jemalloc)
   Compiling rustc_tsan v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_tsan)
   Compiling std v0.0.0 (file:///home/ariel/Rust/rust/src/libstd)
   Compiling rand v0.0.0 (file:///home/ariel/Rust/rust/src/librand)
   Compiling std_unicode v0.0.0 (file:///home/ariel/Rust/rust/src/libstd_unicode)
   Compiling panic_abort v0.0.0 (file:///home/ariel/Rust/rust/src/libpanic_abort)
   Compiling alloc v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc)
   Compiling alloc_system v0.0.0 (file:///home/ariel/Rust/rust/src/liballoc_system)
   Compiling panic_unwind v0.0.0 (file:///home/ariel/Rust/rust/src/libpanic_unwind)
   Compiling collections v0.0.0 (file:///home/ariel/Rust/rust/src/libcollections)
    Finished release [optimized] target(s) in 40.96 secs
Copying stage1 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 test artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling getopts v0.2.14
   Compiling term v0.0.0 (file:///home/ariel/Rust/rust/src/libterm)
   Compiling test v0.0.0 (file:///home/ariel/Rust/rust/src/libtest)
    Finished release [optimized] target(s) in 13.54 secs
Copying stage1 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building stage1 compiler artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
   Compiling graphviz v0.0.0 (file:///home/ariel/Rust/rust/src/libgraphviz)
   Compiling ar v0.3.0
   Compiling arena v0.0.0 (file:///home/ariel/Rust/rust/src/libarena)
   Compiling rustc-demangle v0.1.5
   Compiling libc v0.2.30
   Compiling fmt_macros v0.0.0 (file:///home/ariel/Rust/rust/src/libfmt_macros)
   Compiling rustc_platform_intrinsics v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_platform_intrinsics)
   Compiling log v0.3.8
   Compiling serialize v0.0.0 (file:///home/ariel/Rust/rust/src/libserialize)
   Compiling bitflags v1.0.0
   Compiling rustc-serialize v0.3.24
   Compiling stable_deref_trait v1.0.0
   Compiling rustc v0.0.0 (file:///home/ariel/Rust/rust/src/librustc)
   Compiling rustc_back v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_back)
   Compiling syntax v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax)
   Compiling rustc_driver v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_driver)
   Compiling rustc_incremental v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_incremental)
   Compiling rustc_trans v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans)
   Compiling jobserver v0.1.6
   Compiling num_cpus v1.6.2
   Compiling rustc_metadata v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_metadata)
   Compiling env_logger v0.4.3
   Compiling rustc_cratesio_shim v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_cratesio_shim)
   Compiling owning_ref v0.3.3
   Compiling miniz-sys v0.1.9
   Compiling rustc_apfloat v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_apfloat)
   Compiling rustc_data_structures v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_data_structures)
   Compiling rustc_llvm v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_llvm)
   Compiling flate2 v0.2.19
   Compiling rls-span v0.4.0
   Compiling syntax_pos v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax_pos)
   Compiling rls-data v0.10.0
   Compiling rustc_errors v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_errors)
   Compiling rustc_const_math v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_const_math)
   Compiling proc_macro v0.0.0 (file:///home/ariel/Rust/rust/src/libproc_macro)
   Compiling syntax_ext v0.0.0 (file:///home/ariel/Rust/rust/src/libsyntax_ext)
   Compiling rustc_resolve v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_resolve)
   Compiling rustc_typeck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_typeck)
   Compiling rustc_const_eval v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_const_eval)
   Compiling rustc_allocator v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_allocator)
   Compiling rustc_trans_utils v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_trans_utils)
   Compiling rustc_privacy v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_privacy)
   Compiling rustc_mir v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_mir)
   Compiling rustc_passes v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_passes)
   Compiling rustc_lint v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_lint)
   Compiling rustc_save_analysis v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_save_analysis)
   Compiling rustc_plugin v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_plugin)
   Compiling rustc_borrowck v0.0.0 (file:///home/ariel/Rust/rust/src/librustc_borrowck)
   Compiling rustc-main v0.0.0 (file:///home/ariel/Rust/rust/src/rustc)
    Finished release [optimized] target(s) in 900.12 secs
Copying stage1 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Assembling stage2 compiler (x86_64-unknown-linux-gnu)
Uplifting stage1 std (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 std from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 test (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 test from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Uplifting stage1 rustc (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
Copying stage2 rustc from stage1 (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu / x86_64-unknown-linux-gnu)
Building rustdoc for stage2 (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.0 secs
Build completed successfully in 0:26:44

    \-- COMMENT MINE: Would have expected only stage2 to be compiled from rustc onwards, but actually we compiled the entire world.
@arielb1 arielb1 added T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) WG-infra-rustbuild labels Sep 21, 2017
@arielb1 arielb1 changed the title rustbuild --keep-stage 0 doesn't actually work rustbuild --keep-stage 0 still rebuilds everything Sep 21, 2017
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arielb1 commented Sep 21, 2017

cc @Mark-Simulacrum

@aidanhs aidanhs added the C-bug Category: This is a bug. label Sep 21, 2017
@ollie27 ollie27 mentioned this issue Nov 22, 2017
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@kennytm kennytm mentioned this issue Dec 22, 2017
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@Diggsey Diggsey mentioned this issue Dec 22, 2017
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jyn514 commented Jan 1, 2021

@arielb1 are you still running into this? --keep-stage works fine for me.

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jyn514 commented Jun 27, 2022

I'm going to close this since I haven't heard back - it should be less necessary to use --keep-stage 0 now that we recommend stage 1 builds anyway. I use --keep-stage-std 1 quite frequently and that works fine.

@jyn514 jyn514 closed this as not planned Won't fix, can't repro, duplicate, stale Jun 27, 2022
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C-bug Category: This is a bug. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)
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