From c20285dd3655a9685b52205229e675c797cd4418 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Thu, 7 Feb 2019 12:30:54 +0100
Subject: Fix the undefined opts bug

---
 packages/sol-compiler/CHANGELOG.json        | 4 ++++
 packages/sol-compiler/src/compiler.ts       | 4 ++--
 packages/sol-compiler/test/compiler_test.ts | 3 +++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/packages/sol-compiler/CHANGELOG.json b/packages/sol-compiler/CHANGELOG.json
index dd65f3aed..a0d2250aa 100644
--- a/packages/sol-compiler/CHANGELOG.json
+++ b/packages/sol-compiler/CHANGELOG.json
@@ -5,6 +5,10 @@
             {
                 "note": "Fix a bug when smart recompilation wasn't working because of remappings",
                 "pr": 1575
+            },
+            {
+                "note": "Fix a bug when opts could not be undefined",
+                "pr": "TODO"
             }
         ]
     },
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index c5dea1155..686ba4f82 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -96,12 +96,12 @@ export class Compiler {
      * @return An instance of the Compiler class.
      */
     constructor(opts?: CompilerOptions) {
-        assert.doesConformToSchema('opts', opts, compilerOptionsSchema);
+        const passedOpts = opts || {};
+        assert.doesConformToSchema('opts', passedOpts, compilerOptionsSchema);
         // TODO: Look for config file in parent directories if not found in current directory
         const config: CompilerOptions = fs.existsSync(CONFIG_FILE)
             ? JSON.parse(fs.readFileSync(CONFIG_FILE).toString())
             : {};
-        const passedOpts = opts || {};
         assert.doesConformToSchema('compiler.json', config, compilerOptionsSchema);
         this._contractsDir = path.resolve(passedOpts.contractsDir || config.contractsDir || DEFAULT_CONTRACTS_DIR);
         this._solcVersionIfExists = passedOpts.solcVersion || config.solcVersion;
diff --git a/packages/sol-compiler/test/compiler_test.ts b/packages/sol-compiler/test/compiler_test.ts
index 464aa8bb6..5cc7e41ce 100644
--- a/packages/sol-compiler/test/compiler_test.ts
+++ b/packages/sol-compiler/test/compiler_test.ts
@@ -23,6 +23,9 @@ describe('#Compiler', function(): void {
         contractsDir,
         contracts: constants.contracts,
     };
+    it('should create a Compiler with empty opts', async () => {
+        const _compiler = new Compiler();
+    });
     it('should create an Exchange artifact with the correct unlinked binary', async () => {
         compilerOpts.contracts = ['Exchange'];
 
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