Assert on dmd/func.d(2641)

[ljmf00]

Compiler bug on ./compiler/druntime/src/rt/monitor_.d

Scan with -f..

core.exception.AssertError@../compiler/dmd/src/dmd/func.d(2641): Assertion failure
----------------
??:? _d_assertp [0x7f894d93a528]
../compiler/dmd/src/dmd/func.d:2641 _ZN15FuncDeclaration8genCfuncEP5ArrayIP9ParameterEP4TypeP10Identifierm [0x5577c02358ca]
../compiler/dmd/src/dmd/statementsem.d:3372 _ZN24StatementSemanticVisitor5visitEP21SynchronizedStatement [0x5577c0292d85]
../compiler/dmd/src/dmd/statement.d:1522 _ZN21SynchronizedStatement6acceptEP7Visitor [0x5577c0284d0d]
../compiler/dmd/src/dmd/statementsem.d:147 _Z17statementSemanticP9StatementP5Scope [0x5577c0286561]
../compiler/dmd/src/dmd/statementsem.d:268 _ZN24StatementSemanticVisitor5visitEP17CompoundStatement [0x5577c0286956]
../compiler/dmd/src/dmd/statement.d:628 _ZN17CompoundStatement6acceptEP7Visitor [0x5577c02830d5]
../compiler/dmd/src/dmd/statementsem.d:147 _Z17statementSemanticP9StatementP5Scope [0x5577c0286561]
../compiler/dmd/src/dmd/semantic3.d:602 _ZN16Semantic3Visitor5visitEP15FuncDeclaration [0x5577c027cecf]
../compiler/dmd/src/dmd/func.d:2833 _ZN15FuncDeclaration6acceptEP7Visitor [0x5577c0235fbd]
../compiler/dmd/src/dmd/semantic3.d:82 _Z9semantic3P7DsymbolP5Scope [0x5577c027b90d]
../compiler/dmd/src/dmd/semantic3.d:1508 _ZN16Semantic3Visitor5visitEP17AttribDeclaration [0x5577c0280866]
../compiler/dmd/src/dmd/parsetimevisitor.d:71 _ZN16ParseTimeVisitorI10ASTCodegenE5visitEP15LinkDeclaration [0x5577c02bb89e]
../compiler/dmd/src/dmd/attrib.d:433 _ZN15LinkDeclaration6acceptEP7Visitor [0x5577c0161ae1]
../compiler/dmd/src/dmd/semantic3.d:82 _Z9semantic3P7DsymbolP5Scope [0x5577c027b90d]
../compiler/dmd/src/dmd/semantic3.d:197 _ZN16Semantic3Visitor5visitEP6Module [0x5577c027bd0e]
../compiler/dmd/src/dmd/dmodule.d:1469 _ZN6Module6acceptEP7Visitor [0x5577c01a4781]
../compiler/dmd/src/dmd/semantic3.d:82 _Z9semantic3P7DsymbolP5Scope [0x5577c027b90d]
../compiler/dmd/src/dmd/frontend.d:439 void dmd.frontend.fullSemantic(dmd.dmodule.Module) [0x5577c010130f]
../source/dmdlint/scanner/app.d:37 void dmdlint.scanner.app.processSourceFile(immutable(char)[]) [0x5577c00314f2]
../source/dmdlint/scanner/app.d:161 _Dmain [0x5577c0031ed5]