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authorSimonas Kazlauskas <git@kazlauskas.me>2017-01-11 16:28:23 +0200
committerSimonas Kazlauskas <git@kazlauskas.me>2017-01-11 19:38:44 +0200
commite97f104da64d047c919fc2fccf720efd46f30261 (patch)
tree01852a2075f40887626b9ff2c4d2967bf257491c /src/libstd
parente57f061be20666eb0506f6f41551c798bbb38b60 (diff)
downloadrust-e97f104da64d047c919fc2fccf720efd46f30261.tar.gz
rust-e97f104da64d047c919fc2fccf720efd46f30261.zip
Fix two const-eval issues related to i128 negation
First issue here was the fact that we’d only allow negating integers in i64 range in case the
integer was not infered yes. While this is not the direct cause of the issue, its still good to fix
it.

The real issue here is the code handling specifically the `min_value` literals. While I128_OVERFLOW
has the expected value (0x8000_..._0000), match using this value as a pattern is handled
incorrectly by the stage1 compiler (it seems to be handled correctly, by the stage2 compiler). So
what we do here is extract this pattern into an explicit `==` until the next snapshot.

Fixes #38987
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