(cherry picked from commit 8ebe564)

(cherry picked from commit 64be75f)

(cherry picked from commit fcf9063)

(cherry picked from commit 6723492)

(cherry picked from commit 191f2ae)

(cherry picked from commit fa641c6)

This allows dropping MbedTLS patches which have been upstreamed.
The order in which configuration options are returned has changed, making a test fail:
make the code more robust by giving priority to more specific options over global ones.

(cherry picked from commit d0b5d98)

The var"##" syntax should be disabled in string interpolation.

Disallow `var` syntax in command interpolations

This is special cased for compatibility. A more general fix would be to
make cmd interpolation syntax exactly the same as string interpolation.

(cherry picked from commit 050160c)

(cherry picked from commit cd16f6e)

This function operates on values not on types (though it is a bit of
a trap). Also add a test to catch this bug.

(cherry picked from commit aee3fc2)

…2989)

For types that weren't subtypes of AbstractFloat, we used to try
to LU factorize without pivoting and only use pivoting when it failed.
This caused large numerical errors when computing the LU for element
types which promoted to float like numbers such as most integers.
The behavior was never documented and is error prone. Hence, this
PR removes the behavior.

(cherry picked from commit 5af3c2a)

(cherry picked from commit d1979e3)

(cherry picked from commit 24f1611)

(cherry picked from commit 4c12b7a)

- move the place where --trace-compile outputs precompile statement to a location that catches more cases
- tweak the REPL code to be more amenable to precompilation in light of
- instead of trying to encode all the rules where the precompile emitter
  fails (#28808) just try to precompile and do nothing if it fails.

(cherry picked from commit c0478d8)

(cherry picked from commit 7d65e13)

(cherry picked from commit 56fdb19)

Upgrade `doc/make.jl` to introspect branch/tag names from git info

(cherry picked from commit ad8cf8d)

(cherry picked from commit e6dd72f)

(cherry picked from commit 5c42f10)

Followup to https://github.com/JuliaLang/julia/pull/31724/files#r317686891; instead of widening the index type dynamically based upon the index vector length, just throw an error in the case where the index type cannot hold all the indices in a CSC format. This previously was an OOB access (and likely segfault) in 1.2, so throwing an error here is not a breaking change -- and throwing an error restores type stability, addressing the performance regression flagged in #32985.

(cherry picked from commit 9725fb4)

Fixes #33076
(cherry picked from commit 7bc7904)

We avoid computing axes for tuples -- which is a valuable optimization -- but when we explicitly construct a tuple broadcast with axes pre-set (for, e.g., broadcasted assignment), we need to check that those axes are compatible with the ones inside the broadcasted expression before accepting them.
(cherry picked from commit b5c4e63)

(cherry picked from commit 4bf946a)

* Bump libssh2 to `v1.9.0`, use MbedTLS on all platforms

* Remove patches from source builds

(cherry picked from commit d3250fe)

(cherry picked from commit a9d4eac)

* Fix behavior of Sys.which when passed an empty String argument

* Added test to check for fixed Sys.which behavior with empty string input

* Added test to check that Sys.which returns nothing when passed a blank
string

* Ensure that Sys.which returns a regular file and never a directory

* Moved new Sys.which tests into test/spawn.jl alongside the existing ones

* Remove new which tests from test/sysinfo.jl (they've moved to
test/spawn.jl)

(cherry picked from commit fa235cc)

…ars (#33145)

The static parameters of an outer scope should not be passed along
to inner scopes; it instead needs to be handled by the lookup process
iterating back to enclosing scopes.

(cherry picked from commit 0fc3f03)

(cherry picked from commit 921b4f8)

(cherry picked from commit 4c8cd3b)

…sk_ has the lock. (#33159)

* Fix `assert_havelock(::ReentrantLock)` to assert that the _current-task_ has the lock.

Before this commit, new threads would incorrectly believe that they held
a lock on a Condition when they actually didn't, and would allow illegal
operations, e.g. notify:

```julia
julia> c = Threads.Condition()
Base.GenericCondition{ReentrantLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), ReentrantLock(nothing, Base.GenericCondition{Base.Threads.SpinLock}(Base.InvasiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(Base.Threads.Atomic{Int64}(0))), 0))

julia> lock(c)

julia> fetch(Threads.@Spawn Base.assert_havelock(c))  # This should be an ERROR (the new thread doesn't have the lock)

julia> fetch(Threads.@Spawn notify(c))                # This should be an ERROR (the new thread doesn't have the lock)
0

julia> fetch(Threads.@Spawn wait(c))                  # This error should be caught earlier (in assert_havelock).
ERROR: TaskFailedException:
unlock from wrong thread
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] unlockall(::ReentrantLock) at ./lock.jl:121
 [3] wait(::Base.GenericCondition{ReentrantLock}) at ./condition.jl:105
 [4] (::var"##19#20")() at ./threadingconstructs.jl:113
```

(The same holds for `@async` as `@spawn`.)

After this change, the assertion works correctly:
```
julia> c = Threads.Condition();

julia> lock(c)

julia> fetch(Threads.@Spawn Base.assert_havelock(c))  # This correctly ERRORs
ERROR: TaskFailedException:
concurrency violation detected
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] concurrency_violation() at ./condition.jl:8
 [3] assert_havelock at ./condition.jl:28 [inlined]
 [4] assert_havelock at ./REPL[22]:1 [inlined]
 [5] assert_havelock(::Base.GenericCondition{ReentrantLock}) at ./condition.jl:73
 [6] (::var"##21#22")() at ./threadingconstructs.jl:113
```

Also adds unit test that failed before this commit but now succeeds

* Remove default impl of `assert_havelock`; add `::SpinLock` impl

(cherry picked from commit 784eb57)

(cherry picked from commit 2de79f7)

This reverts commit a7fabc9.

This reverts commit 8d8b3d9.

(cherry picked from commit f71f58e)

(cherry picked from commit 6a20ad7)