The Microsoft.NETCore.Compilers package produced for the xplat
build was a one-off build on my dev machine. We should move to
a proper build from master with the same version as the desktop
compiler package.

changed logger to log errors from all analyzers not just first analyzer

Update CreateProjectInfo to accept relative analyzer paths

made diagnostic engine to verify span given to diagnostic from analyz…

Use a linear algorithm to find the best candidate

Merging on behalf of @alrz
Thanks for the contribution!

Pass the correct configuration arg

Revert "Merge pull request #18383 from CyrusNajmabadi/fastInitialTagg…ing"

# Conflicts:
#	src/Compilers/CSharp/Portable/Binder/Semantics/Operators/BinaryOperatorOverloadResolution.cs
#	src/Compilers/CSharp/Portable/Binder/Semantics/Operators/UnaryOperatorOverloadResolution.cs

Fix signed build break

This reverts commit 054509fd, reversing
changes made to fc11e8ad.

Correct the reference to the deleted BuildAndTest.proj file to use the build.ps1 script.

Merge master to dev15.6

Add non-test IVT for project system test assemblies

Merge master to dev15.6

Support all roslyn languages in Formatter.FormatAsync(Document)
Fixes #20285

Unify our build logic

Source packages cleanup

Optimize fast path for "Use 'var'" code style

Validating params even if they aren't last
Fixes #18875.

This is to prevent misleading errors like "cannot convert from 'typeA'
to 'typeA'" https://github.com/dotnet/roslyn/issues/18875

* Error CS0503 shows the correct modifier target