"memory allocation of _ bytes failed" when compiling certain crates #68607
Description
When trying to compile Rocket as a dependency on nightly, the build intermittently fails after making a large allocation, typically of about 34GB.
In the process, the system memory usage quickly reaches capacity and then the error occurs after a few seconds.
Possibly related: rust-lang/cargo#7840
Reproduction
Run cargo.exe new rocket_test.
Add rocket = "0.4" as a dependency to Cargo.toml.
Run cargo.exe build on nightly.
Meta
System
Windows 10
16GB RAM
Rustc version
$ rustc.exe --version --verbose
rustc 1.42.0-nightly (8a79d08fa 2020-01-27)
binary: rustc
commit-hash: 8a79d08fa57e1c257d647c9848e35defcb379c07
commit-date: 2020-01-27
host: x86_64-pc-windows-msvc
release: 1.42.0-nightly
LLVM version: 9.0
Cargo output
$ cargo.exe --verbose build
Fresh unicode-xid v0.1.0
Fresh version_check v0.1.5
Fresh smallvec v1.1.0
Fresh matches v0.1.8
Fresh yansi v0.4.0
Fresh cc v1.0.50
Fresh cfg-if v0.1.10
Fresh percent-encoding v1.0.1
Fresh version_check v0.9.1
Fresh autocfg v1.0.0
Fresh safemem v0.3.3
Fresh yansi v0.5.0
Fresh untrusted v0.6.2
Fresh language-tags v0.2.2
Fresh typeable v0.1.2
Fresh traitobject v0.1.0
Fresh state v0.4.1
Fresh unicode-normalization v0.1.12
Fresh unicode-bidi v0.3.4
Compiling ring v0.13.5
Running `rustc --crate-name build_script_build C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\ring-0.13.5\build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C debuginfo=2 --cfg "feature=\"default\"" --cf
g "feature=\"dev_urandom_fallback\"" --cfg "feature=\"use_heap\"" -C metadata=1a15ad6c82b60c04 -C extra-filename=-1a15ad6c82b60c04 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\build\ring-1a15ad6c82b60c04 -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\dep
s --extern cc=C:\Users\Nathan\Desktop\rocket\target\debug\deps\libcc-946cf986cc7db055.rlib --cap-lints allow`
Compiling rocket_codegen v0.4.2
Compiling rocket v0.4.2
Compiling proc-macro2 v0.4.30
Compiling libc v0.2.66
Compiling byteorder v1.3.2
Running `rustc --crate-name build_script_build C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\rocket_codegen-0.4.2\build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=284f14c65bf
013fe -C extra-filename=-284f14c65bf013fe --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\build\rocket_codegen-284f14c65bf013fe -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --extern version_check=C:\Users\Nathan\Desktop\rocket\target\debug\deps\libve
rsion_check-8db3cc685504e6bd.rlib --extern yansi=C:\Users\Nathan\Desktop\rocket\target\debug\deps\libyansi-6a6e593e43fda685.rlib --cap-lints allow`
Running `rustc --crate-name build_script_build C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\rocket-0.4.2\build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C debuginfo=2 --cfg "feature=\"default\"" --c
fg "feature=\"private-cookies\"" -C metadata=f3930abe81925812 -C extra-filename=-f3930abe81925812 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\build\rocket-f3930abe81925812 -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --extern version_check=C:\Use
rs\Nathan\Desktop\rocket\target\debug\deps\libversion_check-8db3cc685504e6bd.rlib --extern yansi=C:\Users\Nathan\Desktop\rocket\target\debug\deps\libyansi-6a6e593e43fda685.rlib --cap-lints allow`
Running `rustc --crate-name proc_macro2 C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\proc-macro2-0.4.30\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg "feat
ure=\"default\"" --cfg "feature=\"nightly\"" --cfg "feature=\"proc-macro\"" -C metadata=c0ae366126deddd3 -C extra-filename=-c0ae366126deddd3 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\deps -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --extern un
icode_xid=C:\Users\Nathan\Desktop\rocket\target\debug\deps\libunicode_xid-8104dae258f2c7fd.rmeta --cap-lints allow --cfg u128 --cfg use_proc_macro --cfg wrap_proc_macro --cfg proc_macro_span`
Running `rustc --crate-name libc C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\libc-0.2.66\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg "feature=\"default\
"" --cfg "feature=\"std\"" -C metadata=99fc6d3d0ed157f9 -C extra-filename=-99fc6d3d0ed157f9 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\deps -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --cap-lints allow --cfg freebsd11 --cfg libc_priv_mod_use --
cfg libc_union --cfg libc_const_size_of --cfg libc_align --cfg libc_core_cvoid --cfg libc_packedN`
Compiling winapi v0.3.8
Running `rustc --crate-name byteorder C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\byteorder-1.3.2\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg "feature=\
"default\"" --cfg "feature=\"std\"" -C metadata=8e0e2ef74f6e6b59 -C extra-filename=-8e0e2ef74f6e6b59 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\deps -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --cap-lints allow --cfg byteorder_i128`
Running `rustc --crate-name winapi C:\Users\Nathan\.cargo\registry\src\github.com-1ecc6299db9ec823\winapi-0.3.8\src\lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg "feature=\"conso
leapi\"" --cfg "feature=\"minwinbase\"" --cfg "feature=\"minwindef\"" --cfg "feature=\"ntdef\"" --cfg "feature=\"processenv\"" --cfg "feature=\"profileapi\"" --cfg "feature=\"std\"" --cfg "feature=\"sysinfoapi\"" --cfg "feature=\"timezoneapi\"" --cfg "feature=\"winbase\"" -
C metadata=219eb773078db546 -C extra-filename=-219eb773078db546 --out-dir C:\Users\Nathan\Desktop\rocket\target\debug\deps -L dependency=C:\Users\Nathan\Desktop\rocket\target\debug\deps --cap-lints allow --cfg "feature=\"wincontypes\"" --cfg "feature=\"excpt\"" --cfg "featu
re=\"cfgmgr32\"" --cfg "feature=\"wincon\"" --cfg "feature=\"basetsd\"" --cfg "feature=\"devpropdef\"" --cfg "feature=\"wingdi\"" --cfg "feature=\"ktmtypes\"" --cfg "feature=\"vcruntime\"" --cfg "feature=\"cfg\"" --cfg "feature=\"winnt\"" --cfg "feature=\"libloaderapi\"" --
cfg "feature=\"guiddef\"" --cfg "feature=\"winreg\"" --cfg "feature=\"vadefs\"" --cfg "feature=\"windef\"" --cfg "feature=\"processthreadsapi\"" --cfg "feature=\"ntstatus\"" --cfg "feature=\"fileapi\"" -l dylib=advapi32 -l dylib=cfgmgr32 -l dylib=gdi32 -l dylib=kernel32 -l
dylib=msimg32 -l dylib=opengl32 -l dylib=user32 -l dylib=winspool`
Compiling idna v0.1.5
memory allocation of 36641439744 bytes failed