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Auto merge of #45198 - oli-obk:fmt_args, r=sfackler
Prevent fmt::Arguments from being shared across threads Fixes #45197 This is a **breaking change**! Without doing this it's very easy to create race conditions. There's probably a way to do this without breaking valid use cases, but it would require quite an overhaul of the formatting machinery.
1.0.5454
7 years ago by bors
7 years ago in 2 hr 20 min
Environment: MSYS_BITS=32, RUST_CONFIGURE_ARGS=--build=i686-pc-windows-gnu, SCRIPT=python x.py test, MINGW_URL=https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror, MINGW_ARCHIVE=i686-6.3.0-release-posix-dwarf-rt_v5-rev2.7z, MINGW_DIR=mingw32
2 hr 20 min
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