fixes

Author: IanButterworth

stdlib/Profile/src/Profile.jl

@@ -97,7 +97,8 @@ function init(; n::Union{Nothing,Integer} = nothing, delay::Union{Nothing,Real}
     n_cur = ccall(:jl_profile_maxlen_data, Csize_t, ())
     if n_cur == 0 && isnothing(n) && isnothing(delay)
         # indicates that the buffer hasn't been initialized at all, so set the default
-        return default_init()
+        default_init()
+        n_cur = ccall(:jl_profile_maxlen_data, Csize_t, ())
     end
     delay_cur = ccall(:jl_profile_delay_nsec, UInt64, ())/10^9
     if n === nothing && delay === nothing
@@ -622,7 +623,7 @@ By default metadata such as threadid and taskid is included. Set `include_meta`
 function fetch(;include_meta = true, limitwarn = true)
     maxlen = maxlen_data()
     if maxlen == 0
-        error("The profile data buffer is not initialized, meaning a profile has not been run yet this session.")
+        error("The profiling data buffer is not initialized. A profile has not been requested this session.")
     end
     len = len_data()
     if limitwarn && is_buffer_full()

stdlib/Profile/test/runtests.jl

@@ -3,7 +3,7 @@
 using Test, Profile, Serialization, Logging
 using Base.StackTraces: StackFrame
 
-@test_throws "The profile data buffer is not initialized, meaning a profile has not been run yet this session." Profile.print()
+@test_throws "The profiling data buffer is not initialized. A profile has not been requested this session." Profile.print()
 
 Profile.clear()
 Profile.init()