Don't fail when stepping and there is no call

Author: timholy

src/commands.jl

@@ -330,6 +330,7 @@ function debug_command(@nospecialize(recurse), frame::Frame, cmd::AbstractString
             pc = maybe_next_call!(recurse, frame, istoplevel)
             (isa(pc, BreakpointRef) || pc === nothing) && return maybe_reset_frame!(recurse, frame, pc, rootistoplevel)
             stmt0 = stmt = pc_expr(frame, pc)
+            isexpr(stmt0, :return) && return maybe_reset_frame!(recurse, frame, nothing, rootistoplevel)
             if isexpr(stmt, :(=))
                 stmt = stmt.args[2]
             end

test/debug.jl

@@ -22,6 +22,8 @@ macro insert_some_calls()
     end)
 end
 
+trivial(x) = x
+
 struct B{T} end
 
 # @testset "Debug" begin
@@ -50,6 +52,11 @@ struct B{T} end
         f22() = string(QuoteNode(:a))
         @test step_through(enter_call(f22)) == ":a"
 
+        frame = enter_call(trivial, 2)
+        @test debug_command(frame, "s") === nothing
+        @test get_return(frame) == 2
+
+        @test step_through(enter_call(trivial, 2)) == 2
         @test step_through(enter_call_expr(:($(+)(1,2.5)))) == 3.5
         @test step_through(enter_call_expr(:($(sin)(1)))) == sin(1)
         @test step_through(enter_call_expr(:($(gcd)(10,20)))) == gcd(10, 20)