Problems with -checkaction=context

[Per Nordlöw]

On Tuesday, 26 March 2019 at 10:47:18 UTC, Per Nordlöw wrote:
> errors as
>
> /home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/../import/object.d(4903,12): Error: cannot implicitly convert expression `buffer` of type `char[]` to `string`

Code compiles when I qualify `_d_assert_fail` as `@trusted` and 
replace its return statement with

     return cast(string)castbuffer;

But then ldmd2 crashes as

/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN4llvm3sys15PrintStackTraceERNS_11raw_ostreamE+0x2a)[0x2d619ca]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN4llvm3sys17RunSignalHandlersEv+0x4c)[0x2d5f94c]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2[0x2d5fab7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12890)[0x7fc9d4f45890]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN25ExpressionSemanticVisitor5visitEP9AssertExp+0x44e)[0xcc67fe]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP12ExpStatement+0x62)[0xb911b2]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0x130)[0xb91b30]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP19TryFinallyStatement+0x3d)[0xbb14fd]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN24StatementSemanticVisitor5visitEP17CompoundStatement+0xc4c)[0xb9264c]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP15FuncDeclaration+0x1832)[0xbc7752]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP17AttribDeclaration+0x7e)[0xbd029e]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP17AttribDeclaration+0x7e)[0xbd029e]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP17AttribDeclaration+0x7e)[0xbd029e]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP20AggregateDeclaration+0x8d)[0xbd036d]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP16TemplateInstance+0x142)[0xbc52a2]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_ZN16Semantic3Visitor5visitEP6Module+0x95)[0xbc5b05]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_Z13mars_mainBodyR5ParamR5ArrayIPKcES5_+0xdf7)[0xc3cbd7]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_Z7cppmainiPPc+0x17d6)[0xe52676]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(void 
rt.dmain2._d_run_main(int, char**, extern (C) int 
function(char[][])*).runAll()+0x50)[0x2fa46a0]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_d_run_main+0x218)[0x2fa44b8]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fc9d41ecb97]
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2(_start+0x29)[0xb51939]
Error: Error executing 
/home/per/.local/ldc2-1.15.0-beta2-linux-x86_64/bin/ldc2: 
Segmentation fault (core dumped)