Fixes #154

lib/earmark_parser/ast/inline.ex

@@ -270,7 +270,7 @@ defmodule EarmarkParser.Ast.Inline do
     if match = Regex.run(@inline_ial, src) do
       [match, ial] = match
       {context1, ial_attrs} = parse_attrs(context, ial, lnb)
-      new_tags = augment_tag_with_ial(context.value, ial_attrs)
+      new_tags = augment_tag_with_ial(context.value, ial_attrs, match)
       {behead(src, match), lnb, set_value(context1, new_tags), use_linky?}
     end
   end

lib/earmark_parser/helpers/ast_helpers.ex

@@ -25,13 +25,16 @@ defmodule EarmarkParser.Helpers.AstHelpers do
   end
 
   @doc false
-  def augment_tag_with_ial(tags, ial)
-  def augment_tag_with_ial([{t, a, c, m}|tags], atts) do
+  def augment_tag_with_ial(tags, ial, src)
+  def augment_tag_with_ial([{t, a, c, m}|tags], atts, _src) do
     [{t, merge_attrs(a, atts), c, m}|tags]
   end
-  def augment_tag_with_ial([], _atts) do
+  def augment_tag_with_ial([], _atts, _src) do
     []
   end
+  def augment_tag_with_ial([any], _atts, src) do
+    [any <> src]
+  end
 
   @doc false
   def code_classes(language, prefix) do

test/acceptance/regressions/i154_parser_crash_symbolic_input_test.exs

@@ -0,0 +1,32 @@
+defmodule Test.Acceptance.Regressions.I154pArserCrashSymbolicInputTest do
+  use ExUnit.Case
+
+  import Support.Helpers, only: [as_ast: 1]
+  import EarmarkAstDsl
+
+  test "this should not crash" do
+    ast = [ p("[{:}") ]
+    messages = []
+    assert as_ast("\\[{:}") == {:ok, ast, messages}
+  end
+
+  test "this does not crash" do
+    ast = [ p("[{:") ]
+    messages = []
+    assert as_ast("\\[{:") == {:ok, ast, messages}
+  end
+
+  test "nor does this" do
+    ast = [ p("[{:}") ]
+    messages = []
+    assert as_ast("[{:}") == {:ok, ast, messages}
+  end
+
+  test "nor this" do
+    ast = [{"p", [], [{"em", [], ["a"], %{}}], %{}}]
+    messages = []
+    assert as_ast("*a*{:}") == {:ok, ast, messages}
+
+  end
+end
+# SPDX-License-Identifier: Apache-2.0