[SR-13305] Derivative function protocol witness SILGen crash for non-wrt inout parameter #55745
Description
| Previous ID | SR-13305 |
| Radar | None |
| Original Reporter | @dan-zheng |
| Type | Bug |
| Status | Closed |
| Resolution | Done |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | |
| Labels | Bug |
| Assignee | @dan-zheng |
| Priority | Medium |
md5: 5025ef37b09b0ab538d4ba0382ddf907
Issue Description:
import _Differentiation
protocol MyProtocol {
@differentiable(wrt: weight)
func execute(weight: Float, outputs: inout Float)
}
struct Impl: MyProtocol {
func execute(weight: Float, outputs: inout Float) {
outputs = weight
}
}$ swiftc sr-13305.swift
Assertion failed: (!array.empty() && "claiming next from empty array!"), function claimNext, file /Users/danielzheng/swift-bart/swift/lib/SILGen/SILGenPoly.cpp, line 112.
Stack dump:
...
1. Swift version 5.3-dev (LLVM 7bfb26db929c00a, Swift 3263d261f1e42cf)
2. While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "sr-13305.swift")
3. While generating SIL witness table protocol conformance to 'MyProtocol' (at sr-13305.swift:3:1) for type 'Impl' (declared at [sr-13305.swift:8:1 - line:12:1] RangeText="struct Impl: MyProtocol {
func execute(weight: Float, outputs: inout Float) {
outputs = weight
}
")
4. While generating protocol witness thunk SIL function "@AD__$s4main4ImplVAA10MyProtocolA2aDP7execute6weight7outputsySf_SfztFTW_jvp_SUU".
for 'execute(weight:outputs:)' (at sr-13305.swift:9:3)
5. While emitting reabstraction thunk in SIL function "@$sSfIegy_S2fIegyd_TR".
for <<debugloc at "<compiler-generated>":0:0>>0 swift-frontend 0x0000000111aa5105 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1 swift-frontend 0x0000000111aa40b8 llvm::sys::RunSignalHandlers() + 248
2 swift-frontend 0x0000000111aa5706 SignalHandler(int) + 262
3 libsystem_platform.dylib 0x00007fff6a3e15fd _sigtramp + 29
4 libsystem_platform.dylib 000000000000000000 _sigtramp + 18446603338733709856
5 libsystem_c.dylib 0x00007fff6a2b7808 abort + 120
6 libsystem_c.dylib 0x00007fff6a2b6ac6 err + 0
7 swift-frontend 0x000000010be046cd swift::SILResultInfo const& claimNext<swift::SILResultInfo>(llvm::ArrayRef<swift::SILResultInfo>&) + 93
8 swift-frontend 0x000000010be032e0 (anonymous namespace)::ResultPlanner::claimNextInnerResult((anonymous namespace)::ResultPlanner::PlanData&) + 32