Beta backports

[nikomatsakis]

Backports of:

• do not fetch variance for items when equating #41913 (or some of it)
• use equality in the coerce-unsized check #41937
• enforce WF conditions after generalizing #41716
• Make sure openssl compiles with only one core #41563

[rust-highfive]

r? @pnkfelix

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[rust-highfive]

Warning

• Pull requests are usually filed against the master branch for this repo, but this one is against beta. Please double check that you specified the right target!

[nikomatsakis]

@bors r+ p=1

[bors]

📌 Commit a30c932 has been approved by nikomatsakis

[bors]

⌛ Testing commit a30c932 with merge adad643...

[bors]

💔 Test failed - status-travis

[kennytm]

Failure in building OpenSSL on macOS.

• Spurious error compiling OpenSSL on OSX #40417? Backport Make sure openssl compiles with only one core #41563 as well?

[01:02:09] stderr ----
[01:02:09] ar: creating archive ../libcrypto.a
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../libcrypto.a(ebcdic.o) has no symbols
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../libcrypto.a(fips_ers.o) has no symbols
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../libcrypto.a(ebcdic.o) has no symbols
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../libcrypto.a(fips_ers.o) has no symbols
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: archive member: ../../libcrypto.a(mem.o) size too large (archive member extends past the end of the file)
[01:02:09] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed
[01:02:09] make[3]: *** [lib] Error 1
[01:02:09] make[2]: *** [subdirs] Error 1
[01:02:09] make[1]: *** [build_crypto] Error 1

[est31]

Backport #41563 as well?

let's see where a retry brings us...

@bors retry

[brson]

@bors r+ p=1

I went ahead and backported the simple openssl build fix.

[bors]

📌 Commit 0566d02 has been approved by brson

[bors]

⌛ Testing commit 0566d02 with merge 2df18ed...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: brson
Pushing 2df18ed to beta...