From 7454432990b41c48904a2672fa7979cf1d686b97 Mon Sep 17 00:00:00 2001
From: Tim Holy <tim.holy@gmail.com>
Date: Wed, 13 Mar 2019 13:09:17 -0500
Subject: [PATCH] Enclose signatures_at in try/catch (fixes #132)

---
 src/breakpoints.jl  | 9 +++++++--
 test/breakpoints.jl | 7 +++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/breakpoints.jl b/src/breakpoints.jl
index e07c781cedabbe..02176e83508cac 100644
--- a/src/breakpoints.jl
+++ b/src/breakpoints.jl
@@ -203,10 +203,15 @@ end
 Set a breakpoint at the specified file and line number.
 """
 function breakpoint(filename::AbstractString, line::Integer, args...)
-    sigs = signatures_at(filename, line)
+    local sigs
+    try
+        sigs = signatures_at(filename, line)
+    catch
+        sigs = nothing
+    end
     if sigs === nothing
         # TODO: build a Revise-free fallback. Note this won't work well for methods with keywords.
-        error("no signatures found at $filename, $line. Restarting and `using Revise` may fix this problem.")
+        error("no signatures found at $filename, $line.\nRestarting and `using Revise` and the relevant package may fix this problem.")
     end
     for sig in sigs
         method = JuliaInterpreter.whichtt(sig)
diff --git a/test/breakpoints.jl b/test/breakpoints.jl
index 8dce1ae8c83034..01fb7b3ada9df3 100644
--- a/test/breakpoints.jl
+++ b/test/breakpoints.jl
@@ -110,6 +110,13 @@ end
         var = JuliaInterpreter.locals(leaf(frame))
         @test !any(v->v.name == :b, var)
         @test filter(v->v.name == :a, var)[1].value == 2
+    else
+        try
+            breakpoint(pathof(JuliaInterpreter.CodeTracking), 5)
+        catch err
+            @test isa(err, ErrorException)
+            @test occursin("Revise", err.msg)
+        end
     end
 
     # Direct return