crash: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.

[tayloraswift]

Describe the bug

compiling MongoKitten in release mode crashes the compiler (DEVELOPMENT-SNAPSHOT-2022-08-01-a). this is a recent regression; DEVELOPMENT-SNAPSHOT-2022-07-25-a does not crash. this only seems to affect release builds.

swift-frontend: /home/build-user/llvm-project/llvm/include/llvm/Support/Casting.h:269: typename cast_retty<X, Y *>::ret_type llvm::cast(Y *) [X = llvm::CoroAsyncResumeInst, Y = llvm::Value]: Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace.
Stack dump:
0.	While splitting coroutine @"$s11MongoClient0A20SingleConnectionPoolC4next3forAA0aD0CAA0dE7RequestV_tYaKFTf4dn_n"
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x61eb4e3]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x61e922e]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x61eb86f]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x14420)[0x7f7366a9f420]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f7365f1200b]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7f7365ef1859]
/lib/x86_64-linux-gnu/libc.so.6(+0x22729)[0x7f7365ef1729]
/lib/x86_64-linux-gnu/libc.so.6(+0x33fd6)[0x7f7365f02fd6]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3b264ab]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3b210d1]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3aca36d]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x58f0701]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3ac061d]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x58f345b]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3ad61ad]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x58f1f63]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3ac087d]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x5f0c7e4]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3c5c106]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x3ac77ed]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x5f0c7e4]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x96428e]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x96505b]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x979615]
/home/klossy/.swiftenv/versions/DEVELOPMENT-SNAPSHOT-2022-08-01-a/usr/bin/swift-frontend[0x9793f6]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xd6de4)[0x7f73661b2de4]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x8609)[0x7f7366a93609]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x43)[0x7f7365fee133]

Steps To Reproduce
Steps to reproduce the behavior:

1. clone MongoKitten @ 7.1.0
2. compile with swift build -c release

Expected behavior

the build should succeed instead of crashing.

Environment (please fill out the following information)

• OS: ubuntu 20.04

$ swiftenv version
DEVELOPMENT-SNAPSHOT-2022-08-01-a 
$ swift --version
Swift version 5.8-dev (LLVM 07d14852a049e40, Swift 613b3223d9ec5f6)
Target: x86_64-unknown-linux-gnu

[CodaFi]

Looks like a coro splitting problem in LLVM.

CC @aschwaighofer