add faq

Author: Christopher Doris

docs/make.jl

@@ -48,6 +48,7 @@ makedocs(
             "Python to Julia" => "conversion-to-julia.md",
         ],
         "compat.md",
+        "faq.md",
         "pycall.md",
         "releasenotes.md",
     ]

docs/src/faq.md

@@ -0,0 +1,13 @@
+# FAQ & Troubleshooting
+
+## Heap corruption when using PyTorch ([issue 215](https://github.com/cjdoris/PythonCall.jl/issues/215))
+
+On some systems, you may see an error like the following when using `torch` and `juliacall`:
+```text
+Python(65251,0x104cf8580) malloc: Heap corruption detected, free list is damaged at 0x600001c17280
+*** Incorrect guard value: 1903002876
+Python(65251,0x104cf8580) malloc: *** set a breakpoint in malloc_error_break to debug
+[1]    65251 abort      ipython
+```
+
+A solution is to ensure that `juliacall` is imported before `torch`.